/* CSS Reset & Variables for 徐洸紀文化協會 */
:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.75);
    --bg-card-hover: rgba(47, 63, 86, 0.85);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(217, 119, 6, 0.4);
    
    /* 台灣傳統與原民美學色彩系 */
    --primary: #d97706; /* 溫暖琥珀金 */
    --primary-hover: #b45309;
    --secondary: #059669; /* 山林翡翠綠 */
    --accent-red: #dc2626; /* 硃砂紅 / 原民紋飾紅 */
    --accent-terracotta: #c2410c; /* 陶土紅 */

    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    --text-dim: #94a3b8;

    --font-title: 'Noto Serif TC', serif;
    --font-main: 'Noto Sans TC', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
}

body {
    overflow-x: hidden;
    background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, var(--bg-dark) 60%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, #fbbf24 0%, #f97316 50%, #ef4444 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-terracotta) 100%);
    color: #fff;
    box-shadow: 0 4px 20px rgba(217, 119, 6, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(217, 119, 6, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border-color: var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);
}

.site-header.scrolled {
    padding: 12px 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: #fff;
}

.brand-logo-img {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    object-fit: contain;
    background: transparent;
    filter: drop-shadow(0 4px 12px rgba(217, 119, 6, 0.5));
    transition: var(--transition);
}

.brand-logo:hover .brand-logo-img {
    transform: scale(1.08);
}

.logo-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), var(--accent-terracotta));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

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

.logo-text {
    font-family: var(--font-title);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
}

.logo-subtext {
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background-color: #fff;
    transition: var(--transition);
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, rgba(217, 119, 6, 0.25) 0%, rgba(5, 150, 105, 0.15) 50%, transparent 70%);
    filter: blur(90px);
    pointer-events: none;
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(251, 191, 36, 0.12) 1px, transparent 1px);
    background-size: 36px 36px;
    opacity: 0.3;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 920px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border-radius: var(--radius-full);
    background: rgba(217, 119, 6, 0.12);
    border: 1px solid rgba(217, 119, 6, 0.35);
    color: #fef08a;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.4; }
    50% { opacity: 1; }
    100% { opacity: 0.4; }
}

.hero-title {
    font-family: var(--font-title);
    font-size: 3.6rem;
    font-weight: 900;
    line-height: 1.25;
    letter-spacing: -0.5px;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 80px;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

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

.stat-number {
    display: inline-block;
    font-family: var(--font-title);
    font-size: 2.8rem;
    font-weight: 900;
    color: #fff;
}

.stat-plus {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Section Header */
.section-header {
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.section-title {
    font-family: var(--font-title);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
}

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

/* About Tabs */
.about-tabs {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(16px);
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
    color: #fff;
    background: rgba(217, 119, 6, 0.2);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.value-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.value-card h3 {
    font-family: var(--font-title);
    margin-bottom: 12px;
    font-size: 1.25rem;
}

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

.vision-box {
    text-align: center;
    padding: 40px;
}

.vision-quote {
    font-family: var(--font-title);
    font-size: 1.5rem;
    font-weight: 600;
    font-style: italic;
    color: #fef08a;
    margin-bottom: 20px;
}

.vision-author {
    color: var(--primary);
    font-weight: 600;
}

/* Timeline */
.timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 20px;
}

.timeline-item {
    padding: 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.timeline-year {
    font-family: var(--font-title);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.timeline-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Cultural Pillars / Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(16px);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: 0 15px 35px rgba(217, 119, 6, 0.25);
}

.service-card.highlighted {
    background: linear-gradient(180deg, rgba(217, 119, 6, 0.15) 0%, var(--bg-card) 100%);
    border-color: rgba(217, 119, 6, 0.4);
}

.popular-tag {
    position: absolute;
    top: -14px;
    right: 30px;
    background: linear-gradient(135deg, var(--primary), var(--accent-terracotta));
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: var(--radius-full);
}

.service-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: rgba(217, 119, 6, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 24px;
}

.service-icon {
    width: 32px;
    height: 32px;
}

.service-card h3 {
    font-family: var(--font-title);
    font-size: 1.35rem;
    margin-bottom: 16px;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.service-list {
    list-style: none;
}

.service-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.service-list li svg {
    color: var(--secondary);
    flex-shrink: 0;
}

/* Showcase Case Studies */
.case-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 8px 20px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

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

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(16px);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.25);
}

.case-image {
    height: 200px;
    position: relative;
    overflow: hidden;
}

.case-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-img {
    transform: scale(1.08);
}

.case-image-gradient {
    width: 100%;
    height: 100%;
}

.gradient-culture-1 { background: linear-gradient(135deg, #7c2d12, #d97706); }
.gradient-culture-2 { background: linear-gradient(135deg, #064e3b, #047857); }
.gradient-culture-3 { background: linear-gradient(135deg, #581c87, #c026d3); }

.case-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

.case-content {
    padding: 24px;
}

.case-content h3 {
    font-family: var(--font-title);
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.case-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.case-tags {
    display: flex;
    gap: 8px;
}

.case-tags span {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-dim);
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

/* Team */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.team-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    backdrop-filter: blur(16px);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-6px);
}

.team-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 3px;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
}

.team-card h3 {
    font-family: var(--font-title);
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.team-role {
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.team-bio {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* FAQ */
.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    backdrop-filter: blur(16px);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.05rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 24px 20px;
}

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info h2 {
    font-family: var(--font-title);
    font-size: 2.2rem;
    font-weight: 800;
    margin-top: 8px;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 40px;
}

.info-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.info-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: rgba(217, 119, 6, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.info-item h4 {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 4px;
}

.info-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.contact-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(16px);
    position: relative;
}

.contact-form-card h3 {
    font-family: var(--font-title);
    font-size: 1.4rem;
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.2);
}

.form-group select option {
    background-color: var(--bg-dark);
    color: #fff;
}

.form-success-msg {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.form-success-msg.show {
    display: block;
    animation: fadeIn 0.4s ease;
}

.success-icon {
    width: 60px;
    height: 60px;
    background: var(--secondary);
    color: #fff;
    font-size: 2rem;
    font-weight: bold;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

/* Footer */
.site-footer {
    background: #080d19;
    border-top: 1px solid var(--border-color);
    padding-top: 80px;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 60px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 16px 0 24px;
    max-width: 360px;
}

.cloudflare-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(246, 130, 31, 0.1);
    border: 1px solid rgba(246, 130, 31, 0.3);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    color: #fdba74;
    font-size: 0.85rem;
}

.footer-links h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 20px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* Responsive RWD */
@media (max-width: 992px) {
    .hero-title { font-size: 2.8rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .services-grid, .cases-grid, .team-grid { grid-template-columns: repeat(2, 1fr); }
    .values-grid, .timeline { grid-template-columns: 1fr; }
    .contact-wrapper { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.96);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        transform: translateY(-150%);
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-title { font-size: 2.2rem; }
    .stats-grid { grid-template-columns: 1fr; }
    .services-grid, .cases-grid, .team-grid { grid-template-columns: 1fr; }
}