/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4c1d95;
    --primary-light: #7c3aed;
    --primary-dark: #3b0764;
    --bg-white: #ffffff;
    --bg-light: #fafafa;
    --bg-gray: #f3f4f6;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --border: #e5e7eb;
    --border-dark: #d1d5db;
}

body {
    font-family: 'Noto Sans SC', 'Courier New', Consolas, sans-serif;
    background: var(--bg-light);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    background: url('Background-02.png') center center / cover fixed;
    min-height: 100vh;
    position: relative;
    padding-top: 60px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--primary);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.nav-logo {
    font-size: 20px;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: 4px;
    font-family: 'Courier New', monospace;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 20px;
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

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

.nav-link.active {
    color: var(--primary);
    border: 2px solid var(--primary);
    background: rgba(76, 29, 149, 0.05);
}

/* 语言切换按钮 */
.lang-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 2px solid var(--primary);
    background: var(--bg-white);
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s ease;
    margin-left: 16px;
}

.lang-switch:hover {
    background: var(--primary);
    color: var(--bg-white);
}

.lang-switch span {
    font-family: 'Noto Sans SC', sans-serif;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s ease;
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--primary);
    padding: 16px;
    z-index: 999;
    flex-direction: column;
    gap: 8px;
}

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

.mobile-link {
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.mobile-link:hover,
.mobile-link.active {
    color: var(--primary);
    border-left-color: var(--primary);
    background: rgba(76, 29, 149, 0.05);
}

.mobile-link.lang {
    margin-top: 8px;
    border: 2px solid var(--primary);
    border-left: 2px solid var(--primary);
    text-align: center;
    color: var(--primary);
}

.mobile-link.lang:hover {
    background: var(--primary);
    color: var(--bg-white);
}

/* 通用Section样式 */
.section {
    min-height: 100vh;
    padding: 40px 16px;
    background: rgba(255, 255, 255, 0.92);
}

.section-header {
    text-align: center;
    margin-bottom: 32px;
}

.section-title {
    font-size: 28px;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-bottom: 8px;
    font-family: 'Courier New', monospace;
}

.section-desc {
    font-size: 14px;
    color: var(--text-gray);
    letter-spacing: 2px;
}

/* Home Section */
.home-section {
    padding-top: 20px;
}

.hero-banner {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto 32px;
    aspect-ratio: 16/9;
    overflow: hidden;
    border: 3px solid var(--primary);
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(76, 29, 149, 0.85) 0%, rgba(59, 7, 100, 0.9) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    text-align: center;
    padding: 20px;
}

.event-badge {
    display: inline-block;
    background: var(--bg-white);
    color: var(--primary);
    padding: 6px 16px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 16px;
    font-family: 'Courier New', monospace;
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    color: var(--bg-white);
    letter-spacing: 8px;
    margin-bottom: 8px;
    text-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 4px;
    font-family: 'Courier New', monospace;
    margin-bottom: 16px;
}

.hero-date {
    font-size: 16px;
    color: var(--bg-white);
    font-weight: 600;
    letter-spacing: 2px;
    padding: 8px 20px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    display: inline-block;
}

/* 倒计时 */
.countdown-wrapper {
    max-width: 500px;
    margin: 0 auto 32px;
    background: var(--bg-white);
    border: 2px solid var(--border);
    border-top: 4px solid var(--primary);
    padding: 24px;
    position: relative;
}

.countdown-label {
    position: absolute;
    top: -12px;
    left: 20px;
    background: var(--bg-white);
    padding: 0 12px;
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 3px;
    font-family: 'Courier New', monospace;
}

.countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
}

.time-box {
    background: var(--bg-gray);
    padding: 16px 20px;
    min-width: 70px;
    text-align: center;
    border: 2px solid var(--border);
}

.time-number {
    display: block;
    font-size: 32px;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Courier New', monospace;
}

.time-label {
    display: block;
    font-size: 10px;
    color: var(--text-gray);
    margin-top: 4px;
    letter-spacing: 1px;
    font-weight: 600;
}

.time-separator {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

/* 信息卡片 */
.info-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 500px;
    margin: 0 auto 32px;
}

.info-card {
    background: var(--bg-white);
    border: 2px solid var(--border);
    border-left: 4px solid var(--primary);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
}

.info-card:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.info-icon {
    font-size: 24px;
}

.info-text h3 {
    font-size: 12px;
    color: var(--primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.info-text p {
    font-size: 14px;
    color: var(--text-dark);
}

/* CTA */
.cta-section {
    text-align: center;
    padding: 20px 0;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--primary);
    color: var(--bg-white);
    border: none;
    padding: 16px 48px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 2px;
    transition: all 0.2s ease;
    box-shadow: 4px 4px 0 var(--primary-dark);
}

.cta-button:hover {
    background: var(--primary-light);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--primary-dark);
}

.cta-button:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--primary-dark);
}

.btn-arrow {
    font-size: 18px;
    transition: transform 0.2s ease;
}

.cta-button:hover .btn-arrow {
    transform: translateX(4px);
}

.cta-hint {
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-gray);
}

.highlight {
    color: var(--primary);
    font-weight: 700;
}

/* Agenda Section */
.agenda-section {
    background: rgba(250, 250, 250, 0.95);
}

.date-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.date-tab {
    background: var(--bg-white);
    border: 2px solid var(--border);
    padding: 12px 24px;
    cursor: pointer;
    font-weight: 700;
    font-size: 13px;
    color: var(--text-gray);
    letter-spacing: 1px;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.date-tab span {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-light);
}

.date-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.date-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--bg-white);
}

.date-tab.active span {
    color: rgba(255, 255, 255, 0.8);
}

/* 日程表 */
.schedule-container {
    max-width: 600px;
    margin: 0 auto 40px;
}

.schedule-day {
    display: none;
}

.schedule-day.active {
    display: block;
}

.schedule-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--bg-white);
    border: 2px solid var(--border);
    border-left: 4px solid var(--primary);
    margin-bottom: 12px;
    transition: all 0.2s ease;
}

.schedule-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.schedule-time {
    font-size: 18px;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Courier New', monospace;
    min-width: 60px;
}

.schedule-content h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.schedule-content p {
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.schedule-tag {
    display: inline-block;
    background: rgba(76, 29, 149, 0.1);
    color: var(--primary);
    padding: 4px 10px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 嘉宾 */
.speakers-section {
    max-width: 600px;
    margin: 0 auto;
}

.sub-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-align: center;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.speaker-card {
    background: var(--bg-white);
    border: 2px solid var(--border);
    padding: 24px 16px;
    text-align: center;
    transition: all 0.2s ease;
}

.speaker-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.speaker-avatar {
    width: 64px;
    height: 64px;
    margin: 0 auto 12px;
    border: 2px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-placeholder {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary);
}

.speaker-card h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.speaker-card p {
    font-size: 12px;
    color: var(--text-gray);
}

/* Location Section */
.location-section {
    background: rgba(255, 255, 255, 0.95);
}

.location-info {
    max-width: 600px;
    margin: 0 auto 32px;
}

.location-detail {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-white);
    border: 2px solid var(--border);
    border-left: 4px solid var(--primary);
    margin-bottom: 12px;
    transition: all 0.2s ease;
}

.location-detail:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.location-icon {
    font-size: 24px;
}

.location-text h3 {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.location-text p {
    font-size: 14px;
    color: var(--text-dark);
}

/* 地图容器 */
.map-container {
    max-width: 800px;
    margin: 0 auto 24px;
    border: 3px solid var(--primary);
    background: var(--bg-white);
}

.map-frame {
    width: 100%;
    height: 350px;
    background: var(--bg-gray);
}

/* 导航按钮 */
.nav-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 1px;
    transition: all 0.2s ease;
    border: 2px solid var(--primary);
    background: var(--primary);
    color: var(--bg-white);
}

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

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

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

/* Footer */
.footer {
    background: var(--primary-dark);
    padding: 40px 24px;
    text-align: center;
    border-top: 4px solid var(--primary);
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
}

.footer-contact {
    font-size: 16px;
    color: var(--bg-white);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.copyright {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 1px;
    font-family: 'Courier New', monospace;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.schedule-item,
.info-card,
.speaker-card,
.location-detail {
    animation: fadeInUp 0.4s ease-out both;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 32px;
        letter-spacing: 4px;
    }
    
    .hero-subtitle {
        font-size: 12px;
    }
    
    .countdown {
        gap: 8px;
    }
    
    .time-box {
        min-width: 55px;
        padding: 12px 14px;
    }
    
    .time-number {
        font-size: 24px;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
    
    .speakers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .schedule-item {
        flex-direction: column;
        gap: 8px;
    }
    
    .schedule-time {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 30px 12px;
    }
    
    .section-title {
        font-size: 22px;
        letter-spacing: 3px;
    }
    
    .hero-banner {
        aspect-ratio: 4/3;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .time-box {
        min-width: 48px;
        padding: 10px 10px;
    }
    
    .time-number {
        font-size: 20px;
    }
    
    .time-separator {
        font-size: 20px;
    }
    
    .cta-button {
        padding: 14px 36px;
        font-size: 14px;
    }
    
    .date-tabs {
        gap: 8px;
    }
    
    .date-tab {
        padding: 10px 16px;
        font-size: 12px;
    }
    
    .speakers-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .map-frame {
        height: 280px;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 锚点偏移修正 */
.section {
    scroll-margin-top: 60px;
}