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

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #333;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Navigation - 青春活力渐变导航栏 */
.navbar {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
    padding: 0 40px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(26, 26, 46, 0.3);
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-text {
    color: white;
    font-size: 24px;
    font-weight: bold;
    letter-spacing: 3px;
}

.logo-underline {
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, #FF6B6B, #FF8E53);
    margin-top: 2px;
    border-radius: 2px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-link {
    color: white;
    font-size: 14px;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #FF8E53;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #FF6B6B, #FF8E53);
    border-radius: 2px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-btn {
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.6);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    transition: all 0.3s;
}

.lang-btn:hover {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    border-color: transparent;
    color: white;
}

.search-icon {
    color: white;
    cursor: pointer;
    transition: color 0.3s;
}

.search-icon:hover {
    color: #06D6A0;
}

/* Search Overlay */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.97);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.search-overlay.active {
    opacity: 1;
    visibility: visible;
}
.search-popup {
    width: 600px;
    max-width: 90vw;
    position: relative;
}
.search-input-wrap {
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 2px solid #FF8E53;
    padding-bottom: 12px;
}
.search-input-wrap svg {
    color: rgba(255,255,255,0.5);
    flex-shrink: 0;
}
.search-input-wrap input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: white;
    font-size: 22px;
    padding: 8px 0;
}
.search-input-wrap input::placeholder {
    color: rgba(255,255,255,0.35);
}
.search-close {
    position: absolute;
    top: -50px;
    right: 0;
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    font-size: 36px;
    background: none;
    border: none;
    line-height: 1;
    transition: color 0.3s;
}
.search-close:hover {
    color: #FF6B6B;
}
.search-submit-btn {
    margin-top: 18px;
    padding: 12px 36px;
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-end;
}
.search-submit-btn:hover {
    background: linear-gradient(135deg, #FF8E53, #FF6B6B);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

/* Hero Section - 科技感渐变背景 */
.hero {
    margin-top: 70px;
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 20%, #0F3460 40%, #4A00E0 70%, #7B2CBF 100%);
    background-image: url('shenzhen-skyline.jpg');
    background-size: cover;
    background-position: center;
    min-height: 550px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 150px;

}

/* City skyline silhouette */
.skyline {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 3px;
    opacity: 0.3;
}

.building {
    background: linear-gradient(to top, #1A1A2E, #4A00E0);
    width: 20px;
    border-radius: 2px 2px 0 0;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 900px;
    padding: 0 20px;
}

.hero h1 {
    color: #00B4D8;
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero p {
    color: #FF6B6B;
    font-size: 18px;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #00A8E8 0%, #00B4D8 50%, #06D6A0 100%);
    color: white;
    padding: 14px 32px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #00B4D8 0%, #06D6A0 50%, #00A8E8 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(6, 214, 160, 0.4);
}

.btn-secondary {
    background-color: #1a2b78;
    color: white;
    padding: 14px 32px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.6);
    transition: all 0.3s;
    cursor: pointer;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: white;
    backdrop-filter: blur(10px);
}

/* Stats Section - 活力渐变数据区 */
.stats {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 30%, #0F3460 60%, #4A00E0 100%);
    padding: 60px 20px;
}

.stats-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.stat-item {
    color: white;
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 50%, #FFB347 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
}

/* Browse Exhibitions Section */
.browse-section {
    background-color: #FAFAFA;
    padding: 80px 20px;
}

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

.section-header {
    margin-bottom: 40px;
    position: relative;
    padding-left: 15px;
}

.section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #FF6B6B, #FF8E53);
    border-radius: 2px;
}

.section-title {
    font-size: 32px;
    color: #1A1A2E;
    margin-left: 15px;
}

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

.browse-card {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.browse-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(74, 0, 224, 0.2);
}

.card-popular {
    background: linear-gradient(135deg, #1A1A2E 0%, #4A00E0 100%);
    background-image: url('exhibition-center.jpg');
    background-size: cover;
    background-position: center;
}

.card-large {
    background: linear-gradient(135deg, #16213E 0%, #0F3460 50%, #4A00E0 100%);
    background-image: url('convention-center.jpg');
    background-size: cover;
    background-position: center;
}

.card-more {
    background: linear-gradient(135deg, #0F3460 0%, #7B2CBF 50%, #A855F7 100%);
    background-image: url('shenzhen-futian.jpg');
    background-size: cover;
    background-position: center;
}

.city-silhouette {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 5px;
    opacity: 0.2;
}

.card-content h3 {
    color: white;
    font-size: 20px;
    margin-bottom: 15px;
    position: relative;
    z-index: 5;
}

.btn-card {
    display: inline-block;
    background: linear-gradient(135deg, #00A8E8, #00B4D8);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
    z-index: 5;
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

.btn-card:hover {
    background: linear-gradient(135deg, #00B4D8, #06D6A0);
    box-shadow: 0 6px 20px rgba(6, 214, 160, 0.4);
}

.btn-card-orange {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
}

.btn-card-orange:hover {
    background: linear-gradient(135deg, #FF8E53, #FFB347);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
}

/* Upcoming Exhibitions Section */
.upcoming-section {
    background-color: #F8FAFC;
    padding: 80px 20px;
}

.upcoming-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.view-all-link {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.view-all-link:hover {
    background: linear-gradient(135deg, #FF8E53, #FFB347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.upcoming-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.exhibition-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.exhibition-item {
    background: white;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.3s;
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.exhibition-item:hover {
    box-shadow: 0 8px 30px rgba(74, 0, 224, 0.12);
    transform: translateX(5px);
    border-color: rgba(0, 168, 232, 0.2);
}

.date-box {
    background: linear-gradient(135deg, #00A8E8, #00B4D8);
    color: white;
    padding: 10px 15px;
    border-radius: 12px;
    text-align: center;
    min-width: 70px;
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.25);
}

.date-month {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.date-day {
    font-size: 24px;
    font-weight: bold;
}

.exhibition-info {
    flex: 1;
}

.category-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.1), rgba(124, 58, 237, 0.15));
    color: #7C3AED;
    padding: 3px 10px;
    border-radius:9px;
    font-size: 12px;
    margin-bottom: 5px;
}

.category-tag.industrial {
    background: linear-gradient(135deg, rgba(0, 168, 232, 0.1), rgba(0, 180, 216, 0.15));
    color: #00A8E8;
}

.category-tag.medical {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.1), rgba(6, 214, 160, 0.15));
    color: #06D6A0;
}

.category-tag.manufacturing {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(255, 142, 83, 0.15));
    color: #FF6B6B;
}

.category-tag.electronics {
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.1), rgba(251, 146, 60, 0.15));
    color: #FB923C;
}

.category-tag.consumer {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.1), rgba(168, 85, 247, 0.15));
    color: #A855F7;
}

.exhibition-name {
    font-size: 13px;
    font-weight: 400;
    color: #555;
    line-height: 1.5;
}

.btn-calendar {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.25);
}

.btn-calendar:hover {
    background: linear-gradient(135deg, #FF8E53, #FFB347);
    box-shadow: 0 6px 18px rgba(255, 142, 83, 0.35);
}

.exhibition-visual {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 30%, #4A00E0 70%, #7B2CBF 100%);
    background-image: url('convention-center.jpg');
    background-size: cover;
    background-position: center;
    border-radius: 16px;
    min-height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(74, 0, 224, 0.2);
}

.exhibition-visual::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(6, 214, 160, 0.1) 0%, transparent 50%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.visual-title {
    color: #00A8E8;
    font-size: 28px;
    font-weight: bold;
    text-align: center;
    position: relative;
    z-index: 5;
}

.visual-subtitle {
    color: #00B4D8;
    font-size: 16px;
    margin-top: 10px;
    position: relative;
    z-index: 5;
}

.btn-load-more {
    display: block;
    margin: 40px auto 0;
    background: linear-gradient(135deg, #00A8E8, #00B4D8);
    color: white;
    padding: 12px 40px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);    width: 160px;
}

.btn-load-more:hover {
    background: linear-gradient(135deg, #00B4D8, #06D6A0);
    box-shadow: 0 6px 25px rgba(6, 214, 160, 0.4);
}

/* News Section - 深色活力渐变 */
.news-section {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 30%, #0F3460 60%, #4A00E0 100%);
    padding: 80px 20px;
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.news-header .section-title {
    color: white;
}

.view-all-white {
    color: white;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.view-all-white:hover {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.news-card {
    background-color: white;
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.news-image {
    height: 180px;
    background: linear-gradient(135deg, #1A1A2E, #4A00E0);
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

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

.news-image::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
}

.news-content {
    padding: 20px;
}

.news-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.15), rgba(255, 142, 83, 0.2));
    color: #FF6B6B;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 10px;
}

.news-tag.events {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.15), rgba(6, 214, 160, 0.2));
    color: #06D6A0;
}

.news-tag.global {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.15), rgba(168, 85, 247, 0.2));
    color: #A855F7;
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    color: #1A1A2E;
    margin-bottom: 10px;
    line-height: 1.4;
}

.news-meta {
    color: #888;
    font-size: 12px;
}

/* Policy Section */
.policy-section {
    background-color: #FAFAFA;
    padding: 80px 20px;
}

.policy-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.policy-box {
    background-color: white;
    border-radius: 16px;
    padding: 30px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.policy-box:hover {
    box-shadow: 0 10px 40px rgba(74, 0, 224, 0.1);
    border-color: rgba(0, 168, 232, 0.2);
}

.policy-box-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.policy-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.policy-icon-blue {
    background: linear-gradient(135deg, #00A8E8, #00B4D8);
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

.policy-icon-orange {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.policy-icon svg {
    width: 28px;
    height: 28px;
    fill: white;
}

.policy-box h3 {
    font-size: 20px;
    color: #1A1A2E;
}

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

.policy-item {
    padding: 15px 0;
    border-bottom: 1px solid #F0F0F0;
}

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

.policy-item a {
    color: #444;
    font-size: 14px;
    transition: color 0.3s;
}

.policy-item a:hover {
    background: linear-gradient(135deg, #00A8E8, #06D6A0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-download {
    display: inline-block;
    background: linear-gradient(135deg, #00A8E8, #00B4D8);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 14px;
    margin-top: 20px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

.btn-download:hover {
    background: linear-gradient(135deg, #00B4D8, #06D6A0);
    box-shadow: 0 6px 20px rgba(6, 214, 160, 0.4);
}

.btn-view-all {
    display: inline-block;
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    margin-top: 20px;
    transition: all 0.3s;
}

.btn-view-all:hover {
    background: linear-gradient(135deg, #FF8E53, #FFB347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Footer - 深色渐变底栏 */
.footer {
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
    padding: 60px 20px 30px;
    color: white;
}

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

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1.5fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    font-size: 24px;
    margin-bottom: 15px;
    letter-spacing: 3px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.footer-column h4 {
    font-size: 14px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: white;
}

.footer-contact h4 {
    font-size: 14px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    margin-bottom: 8px;
}

.subscribe-form {
    margin-top: 20px;
}

.subscribe-form input {
    width: 100%;
    padding: 10px 15px;
    border: none;
    border-radius: 20px;
    margin-bottom: 10px;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: all 0.3s;
}

.subscribe-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.subscribe-form input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 2px rgba(0, 168, 232, 0.3);
}

.subscribe-form button {
    width: 100%;
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.subscribe-form button:hover {
    background: linear-gradient(135deg, #FF8E53, #FFB347);
    box-shadow: 0 6px 20px rgba(255, 142, 83, 0.4);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Navigation Overlay */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
    z-index: 999;
    padding-top: 80px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.mobile-nav.active {
    display: flex;
    flex-direction: column;
    opacity: 1;
    visibility: visible;
}

.mobile-nav a {
    color: white;
    font-size: 18px;
    padding: 15px 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.3s;
}

.mobile-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 1024px) {
    .cards-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .upcoming-content {
        grid-template-columns: 1fr;
    }
    
    .policy-content {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .cards-grid, .news-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .navbar {
        padding: 0 20px;
    }

    .navbar .nav-links {
        display: none;
    }

    .navbar .nav-right {
        display: flex;
        align-items: center;
        gap: 15px;
    }

    /* Hero Section Mobile */
    .hero {
        min-height: 400px;
        padding: 40px 15px;
    }

    .hero h1 {
        font-size: 24px !important;
        margin-bottom: 15px;
    }

    .hero p {
        font-size: 14px;
        margin-bottom: 25px;
    }

    .hero-buttons {
        flex-direction: column !important;
        gap: 12px;
    }

    .btn-primary, .btn-secondary {
        padding: 12px 24px;
        font-size: 14px;
    }

    /* Stats Section Mobile */
    .stats {
        padding: 40px 15px;
    }

    .stats-container {
        flex-direction: column;
        gap: 30px;
    }

    .stat-number {
        font-size: 36px;
    }

    .stat-label {
        font-size: 14px;
    }

    /* Browse Section Mobile */
    .browse-section {
        padding: 50px 15px;
    }

    .section-title {
        font-size: 24px;
    }

    .cards-grid {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }

    .browse-card {
        min-height: 200px;
    }

    /* Upcoming Exhibitions Mobile */
    .upcoming-section {
        padding: 50px 15px;
    }

    .upcoming-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .upcoming-content {
        grid-template-columns: 1fr !important;
        gap: 30px;
    }

    .exhibition-list {
        gap: 15px;
    }

    .exhibition-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 15px;
    }

    .exhibition-visual {
        min-height: 250px;
    }

    .visual-title {
        font-size: 22px;
    }

    .btn-calendar {
        width: 100%;
        text-align: center;
    }

    /* News Section Mobile */
    .news-section {
        padding: 50px 15px;
    }

    .news-grid {
        grid-template-columns: 1fr !important;
    }

    .news-image {
        height: 160px;
    }

    /* Policy Section Mobile */
    .policy-section {
        padding: 50px 15px;
    }

    .policy-content {
        grid-template-columns: 1fr !important;
    }

    /* Footer Mobile */
    .footer {
        padding: 40px 15px 20px;
    }

    .footer-main {
        grid-template-columns: 1fr !important;
        gap: 30px;
    }

    .footer-links {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }

    .footer-brand h3 {
        font-size: 20px;
    }

    .subscribe-form input,
    .subscribe-form button {
        padding: 10px 15px;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 20px !important;
    }

    .section-title {
        font-size: 20px;
    }

    .stat-number {
        font-size: 32px;
    }

    .browse-card {
        min-height: 180px;
        padding: 20px;
    }

    .card-content h3 {
        font-size: 16px;
    }

    .news-title {
        font-size: 14px;
    }

    .policy-box {
        padding: 20px;
    }

    .policy-box h3 {
        font-size: 18px;
    }
}