/* ==================== CSS Variables ==================== */
:root {
    /* 禅意东方配色 */
    --color-ink-dark: #2c3e50;
    --color-ink-light: #546e7a;
    --color-bamboo: #7cb342;
    --color-lotus: #ec9ec0;
    --color-mist: #eceff1;
    --color-paper: #fafafa;
    --color-accent: #4db6ac;
    --color-zen-gray: #9e9e9e;
    --color-white: #ffffff;
    
    /* 字体 */
    --font-serif-zh: 'Noto Serif SC', 'Source Han Serif CN', serif;
    --font-sans-zh: 'Noto Sans SC', sans-serif;
    --font-serif-en: 'Crimson Text', 'Playfair Display', serif;
    --font-sans-en: 'Inter', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 其他 */
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

/* ==================== Global Styles ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans-zh), var(--font-sans-en);
    color: var(--color-ink-dark);
    background-color: var(--color-paper);
    line-height: 1.8;
    overflow-x: hidden;
}

/* 中文环境使用衬线字体 */
html[lang="zh-CN"] body {
    font-family: var(--font-serif-zh), var(--font-sans-zh);
}

html[lang="en"] body {
    font-family: var(--font-sans-en), var(--font-serif-en);
}

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

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

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

/* ==================== Navigation ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-ink-dark);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

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

.nav-link {
    color: var(--color-ink-light);
    font-size: 0.95rem;
    font-weight: 400;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-accent);
    background-color: var(--color-mist);
}

.lang-toggle {
    background: var(--color-mist);
    border: 1px solid var(--color-zen-gray);
    color: var(--color-ink-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.lang-toggle:hover {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-mist) 0%, var(--color-paper) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#heroCanvas {
    width: 100%;
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.zen-circle {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    border: 3px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0.3;
    animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.5;
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 300;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
    line-height: 1.3;
}

html[lang="zh-CN"] .hero-title {
    font-family: var(--font-serif-zh);
    font-weight: 400;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-ink-light);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

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

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-ink-dark);
    border-color: var(--color-ink-light);
}

.btn-secondary:hover {
    background: var(--color-ink-dark);
    color: var(--color-white);
    border-color: var(--color-ink-dark);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-zen-gray);
    font-size: 0.85rem;
    z-index: 2;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-zen-gray);
    border-bottom: 2px solid var(--color-zen-gray);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% {
        transform: rotate(45deg) translateY(0);
    }
    50% {
        transform: rotate(45deg) translateY(10px);
    }
}

/* ==================== Sections ==================== */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.03em;
}

html[lang="zh-CN"] .section-title {
    font-family: var(--font-serif-zh);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-ink-light);
    max-width: 700px;
    margin: 0 auto;
}

.title-decoration {
    margin-top: var(--spacing-sm);
}

.decoration-icon {
    width: 40px;
    height: 40px;
    opacity: 0.6;
    margin: 0 auto;
}

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

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

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

.subsection-title {
    font-size: 1.8rem;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--color-ink-light);
    margin-bottom: var(--spacing-md);
}

/* ==================== Positioning Section ==================== */
.positioning-section {
    background: linear-gradient(135deg, var(--color-mist) 0%, var(--color-white) 100%);
}

.positioning-card {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.positioning-icon {
    margin-bottom: var(--spacing-md);
}

.bamboo-decoration {
    width: 60px;
    height: 60px;
    opacity: 0.7;
    margin: 0 auto;
}

.positioning-title {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.positioning-text {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--color-ink-light);
}

/* ==================== Team Section ==================== */
.team-section {
    background: var(--color-white);
}

.team-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.team-content p {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--color-ink-light);
}

/* ==================== Mission Section ==================== */
.mission-section {
    background: var(--color-paper);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 1100px;
    margin: 0 auto;
}

.mission-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.mission-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.mission-card-title {
    font-size: 1.5rem;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.mission-motto {
    font-size: 1.2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.mission-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-ink-light);
}

.values-list {
    list-style: none;
    text-align: left;
}

.values-list li {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-ink-light);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
}

.values-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 1.5rem;
    line-height: 1.3;
}

/* ==================== Services Section ==================== */
.services-section {
    background: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-paper);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    transition: var(--transition);
    text-align: center;
}

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

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.3rem;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.service-desc {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-ink-light);
}

/* ==================== Why Us Section ==================== */
.why-us-section {
    background: var(--color-mist);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.why-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.why-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.why-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.why-card h3 {
    font-size: 1.1rem;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.why-card p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-ink-light);
}

/* ==================== Ethics Section ==================== */
.ethics-section {
    background: var(--color-white);
}

.ethics-content {
    max-width: 800px;
    margin: 0 auto;
}

.ethics-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.ethics-list li {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-ink-dark);
    padding: var(--spacing-md);
    background: var(--color-mist);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
}

/* ==================== CTA Section ==================== */
.cta-section {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-bamboo) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-content {
    max-width: 900px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.cta-text {
    font-size: 1.2rem;
    line-height: 2;
    margin-bottom: var(--spacing-md);
}

.cta-quote {
    font-size: 1.3rem;
    font-style: italic;
    margin: var(--spacing-lg) 0;
    opacity: 0.95;
}

.cta-motto {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.cta-actions .btn-primary {
    background: var(--color-white);
    color: var(--color-accent);
    font-size: 1.1rem;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.cta-actions .btn-primary:hover {
    background: var(--color-paper);
    transform: scale(1.05);
}

/* ==================== Footer ==================== */
.footer {
    background: var(--color-ink-dark);
    color: var(--color-mist);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.footer-logo {
    width: 50px;
    height: 50px;
}

.footer-tagline {
    font-size: 0.95rem;
    color: var(--color-zen-gray);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
    font-weight: 500;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section a {
    color: var(--color-zen-gray);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-zen-gray);
    font-size: 0.9rem;
}