/* Search Box Styles */
.search-box {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    max-width: 500px;
}

.search-box .input-group {
    width: 100%;
}

.search-box .form-control {
    width: 100%;
    height: 50px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0 1.5rem;
    font-size: 1rem;
    background-color: #fff;
}

.search-box .btn-primary {
    width: 100%;
    height: 50px;
    padding: 0 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    border: none;
    color: #fff;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

.search-box .btn-primary:hover {
    background-color: #e55a2b;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 53, 0.3);
}

.search-box .btn-primary:active {
    transform: translateY(0);
}

/* Desktop Styles */
@media (min-width: 769px) {
    .search-box {
        flex-direction: row;
    }

    .search-box .input-group {
        flex: 1;
    }

    .search-box .btn-primary {
        width: auto;
        min-width: 140px;
    }
}

/* Mobile Styles */
@media (max-width: 768px) {
    .search-box {
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .search-box .form-control,
    .search-box .btn-primary {
        height: 40px;
        font-size: 0.95rem;
    }

    .search-box .form-control {
        padding: 0 1rem;
    }

    .search-box .btn-primary {
        padding: 0;
    }
}

/* Small Mobile Devices */
@media (max-width: 576px) {
    .search-box .form-control,
    .search-box .btn-primary {
        height: 38px;
        font-size: 0.9rem;
    }
}

/* Background Patterns */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.03;
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 80' width='80' height='80'%3E%3Cpath fill='%23FF6B35' d='M40 0c22.1 0 40 17.9 40 40S62.1 80 40 80 0 62.1 0 40 17.9 0 40 0zm0 2C19 2 2 19 2 40s17 38 38 38 38-17 38-38S61 2 40 2zm0 4c18.8 0 34 15.2 34 34S58.8 74 40 74 6 58.8 6 40 21.2 6 40 6zm0 2c-17.7 0-32 14.3-32 32s14.3 32 32 32 32-14.3 32-32-14.3-32-32-32z'/%3E%3C/svg%3E") repeat;
}

/* Section Background Patterns */
section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.04;
}

.hero::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath fill='%23FF6B35' d='M30 0a30 30 0 110 60 30 30 0 010-60zm0 5a25 25 0 100 50 25 25 0 000-50zm0 5a20 20 0 110 40 20 20 0 010-40z'/%3E%3C/svg%3E") repeat;
}

.features::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath fill='%23FF6B35' d='M20 0c11 0 20 9 20 20s-9 20-20 20S0 31 0 20 9 0 20 0zm0 5c-8.3 0-15 6.7-15 15s6.7 15 15 15 15-6.7 15-15S28.3 5 20 5z'/%3E%3C/svg%3E") repeat;
}

.about::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50'%3E%3Cpath fill='%23FF6B35' d='M25 0c13.8 0 25 11.2 25 25S38.8 50 25 50 0 38.8 0 25 11.2 0 25 0zm0 3C12.8 3 3 12.8 3 25s9.8 22 22 22 22-9.8 22-22S37.2 3 25 3zm0 3c10.5 0 19 8.5 19 19s-8.5 19-19 19S6 35.5 6 25 14.5 6 25 6z'/%3E%3C/svg%3E") repeat;
}

.gallery::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='45' height='45'%3E%3Cpath fill='%23FF6B35' d='M22.5 0c12.4 0 22.5 10.1 22.5 22.5S34.9 45 22.5 45 0 34.9 0 22.5 10.1 0 22.5 0zm0 4C12.3 4 4 12.3 4 22.5S12.3 41 22.5 41 41 32.7 41 22.5 32.7 4 22.5 4z'/%3E%3C/svg%3E") repeat;
}

.faq::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='35' height='35'%3E%3Cpath fill='%23FF6B35' d='M17.5 0c9.7 0 17.5 7.8 17.5 17.5S27.2 35 17.5 35 0 27.2 0 17.5 7.8 0 17.5 0zm0 3C9.5 3 3 9.5 3 17.5S9.5 32 17.5 32 32 25.5 32 17.5 25.5 3 17.5 3z'/%3E%3C/svg%3E") repeat;
}

/* Ensure content is above patterns */
.container {
    position: relative;
    z-index: 1;
}

/* Add leaf decorations */
.hero::after {
    content: '';
    position: absolute;
    top: 20px;
    right: 20px;
    width: 100px;
    height: 100px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath fill='%2348A14D' d='M50 0c27.6 0 50 22.4 50 50S77.6 100 50 100 0 77.6 0 50 22.4 0 50 0zm0 10c-22.1 0-40 17.9-40 40s17.9 40 40 40 40-17.9 40-40-17.9-40-40-40z'/%3E%3Cpath fill='%2348A14D' d='M50 20c16.6 0 30 13.4 30 30S66.6 80 50 80 20 66.6 20 50s13.4-30 30-30z'/%3E%3C/svg%3E") no-repeat center/contain;
    opacity: 0.1;
    transform: rotate(-15deg);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    body::before {
        opacity: 0.02;
    }

    section::before {
        opacity: 0.03;
    }

    .hero::after {
        width: 60px;
        height: 60px;
        top: 10px;
        right: 10px;
    }
}

:root {
    --primary-color: #FF6B35;
    --secondary-color: #2EC4B6;
    --text-color: #333333;
    --light-color: #FFFFFF;
    --background-color: #F8F9FA;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Base Styles */
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
    padding-top: 76px; /* 为固定导航栏留出空间 */
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
}

h1 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }
p { font-size: clamp(1rem, 1.2vw, 1.125rem); }

/* Header and Navigation */
.header {
    background: var(--light-color);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    height: 76px;
    display: flex;
    align-items: center;
}

.navbar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    margin: 0;
    padding: 0;
}

.navbar-brand h1 {
    color: var(--primary-color);
    margin: 0;
    font-weight: 800;
    transition: var(--transition);
    text-align: center;
}

.navbar-toggler {
    border: none;
    padding: 0.5rem;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.navbar-toggler:focus {
    box-shadow: none;
    outline: none;
}

.navbar-collapse {
    flex-grow: 0;
}

.navbar-nav {
    display: flex;
    align-items: center;
    margin-left: 2rem;
}

.nav-item {
    display: flex;
    align-items: center;
    margin: 0 0.5rem;
}

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    border-radius: 8px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(255, 107, 53, 0.1);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .header {
        height: 62px;
    }

    .navbar {
        padding: 0.5rem 1rem;
    }

    .navbar-brand h1 {
        font-size: 1.25rem;
    }

    .navbar-toggler {
        padding: 0.25rem;
    }

    .navbar-collapse {
        position: absolute;
        top: 62px;
        left: 0;
        right: 0;
        background: var(--light-color);
        padding: 0.5rem 0;
        border-radius: 0 0 var(--border-radius) var(--border-radius);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .navbar-nav {
        margin: 0;
        padding: 0.5rem 0;
    }

    .nav-item {
        margin: 0;
        width: 100%;
    }

    .nav-link {
        padding: 0.75rem 1.5rem;
        justify-content: center;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

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

/* Small Mobile Devices */
@media (max-width: 576px) {
    .navbar-brand h1 {
        font-size: 1.1rem;
    }

    .navbar {
        padding: 0.5rem;
    }
}

/* Sections Common Styles */
section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-color);
    opacity: 0.8;
    max-width: 800px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    padding: 120px 0 100px;
    background: linear-gradient(135deg, #FFF6E9, #FFE5D9);
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-image {
    position: relative;
    z-index: 1;
}

.hero-image img {
    max-width: 60%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Mobile Styles */
@media (max-width: 768px) {
    .hero {
        padding: 80px 0 60px;
        text-align: center;
    }

    .hero-content {
        margin-bottom: 2rem;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-text {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .hero-image {
        margin-top: 2rem; /* 添加上方间距 */
        padding: 0 1rem; /* 添加左右内边距 */
    }

    .hero-image img {
        max-width: 80%;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .feature-item {
        padding: 1rem;
    }

    .feature-number {
        font-size: 1.5rem;
    }
}

/* Small Mobile Devices */
@media (max-width: 576px) {
    .hero {
        padding: 70px 0 50px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-text {
        font-size: 1rem;
    }

    .hero-image {
        margin-top: 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .feature-item {
        padding: 0.75rem;
    }

    .feature-number {
        font-size: 1.25rem;
    }

    .search-box {
        gap: 0.5rem;
        margin-bottom: 1rem;
    }

    .search-box .form-control,
    .search-box .btn-primary {
        height: 36px;
        font-size: 0.85rem;
    }

    .search-box .btn-primary {
        padding: 0 0.75rem;
    }
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    position: relative;
}

.features::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath fill='%232EC4B6' d='M30 0c16.6 0 30 13.4 30 30S46.6 60 30 60 0 46.6 0 30 13.4 0 30 0zm0 4c14.4 0 26 11.6 26 26S44.4 56 30 56 4 44.4 4 30 15.6 4 30 4zm0 4c12.2 0 22 9.8 22 22s-9.8 22-22 22S8 42.2 8 30 17.8 8 30 8z'/%3E%3C/svg%3E") repeat;
    opacity: 0.03;
}

.feature-card {
    background: var(--light-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    height: 100%;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Gallery Section */
.gallery {
    padding: 100px 0;
    background: linear-gradient(135deg, #e8f5e8, #f0f8f0);
    position: relative;
}

.gallery::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50'%3E%3Cpath fill='%2348A14D' d='M25 0c13.8 0 25 11.2 25 25S38.8 50 25 50 0 38.8 0 25 11.2 0 25 0zm0 3C12.8 3 3 12.8 3 25s9.8 22 22 22 22-9.8 22-22S37.2 3 25 3zm0 3c10.5 0 19 8.5 19 19s-8.5 19-19 19S6 35.5 6 25 14.5 6 25 6z'/%3E%3C/svg%3E") repeat;
    opacity: 0.04;
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.gallery-item:hover {
    transform: translateY(-10px);
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 2rem 1.5rem;
    color: var(--light-color);
    transform: translateY(100%);
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h4 {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
}

.gallery-overlay p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .gallery-item {
        margin-bottom: 20px;
    }

    .gallery-item img {
        height: 250px;
    }
}

/* About Section */
.about {
    padding: 100px 0;
    background: linear-gradient(135deg, #fff, #f8f9fa);
    position: relative;
}

.about::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='70' height='70'%3E%3Cpath fill='%23FF6B35' d='M35 0c19.3 0 35 15.7 35 35S54.3 70 35 70 0 54.3 0 35 15.7 0 35 0zm0 4c17.1 0 31 13.9 31 31S52.1 66 35 66 4 52.1 4 35 17.9 4 35 4zm0 4c14.9 0 27 12.1 27 27S49.9 62 35 62 8 49.9 8 35 20.1 8 35 8z'/%3E%3C/svg%3E") repeat;
    opacity: 0.02;
}

.about-video {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-color);
    text-decoration: none;
    transition: var(--transition);
}

.video-play-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--secondary-color);
}

.about-feature {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.about-feature:hover {
    transform: translateX(10px);
}

/* Live Stream Section */
.livestream {
    padding: 100px 0;
    background: linear-gradient(135deg, #FFF6E9, #FFE5D9);
    position: relative;
}

.livestream::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cpath fill='%23FF6B35' d='M20 0c11 0 20 9 20 20s-9 20-20 20S0 31 0 20 9 0 20 0zm0 5c-8.3 0-15 6.7-15 15s6.7 15 15 15 15-6.7 15-15S28.3 5 20 5z'/%3E%3C/svg%3E") repeat;
}

.livestream-container {
    background: var(--light-color);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.livestream-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--light-color);
    padding: 1.5rem 2rem;
    text-align: center;
    position: relative;
}

.livestream-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    margin-bottom: 0.5rem;
    backdrop-filter: blur(10px);
}

.live-indicator {
    width: 10px;
    height: 10px;
    background: #ff4444;
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: livePulse 2s ease-in-out infinite;
}

.live-text {
    font-size: 0.9rem;
    font-weight: 600;
}

.livestream-header h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

@keyframes livePulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

.livestream-player {
    position: relative;
    width: 100%;
    background: #000;
    aspect-ratio: 9/16;
    max-height: 100vh;
    overflow: hidden;
    margin: 0 auto;
    max-width: 480px;
}

.livestream-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.livestream-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.livestream-overlay:hover {
    background: rgba(0, 0, 0, 0.6);
}

.play-button {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
}

.play-button:hover {
    transform: scale(1.1);
    background: var(--secondary-color);
}

.play-button svg {
    width: 40px;
    height: 40px;
    color: var(--light-color);
    margin-left: 5px;
}

.overlay-text {
    text-align: center;
    color: var(--light-color);
}

.overlay-text h4 {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.overlay-text p {
    margin: 0;
    font-size: 1rem;
    opacity: 0.9;
}

.livestream-info {
    padding: 2rem;
    background: var(--light-color);
}

.livestream-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: #fff;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .livestream {
        padding: 60px 0;
    }

    .livestream-header {
        padding: 1rem;
    }

    .livestream-header h3 {
        font-size: 1.25rem;
    }

    .livestream-player {
        aspect-ratio: 9/16;
        max-height: 100vh;
        max-width: 360px;
    }

    .play-button {
        width: 60px;
        height: 60px;
    }

    .play-button svg {
        width: 30px;
        height: 30px;
    }

    .overlay-text h4 {
        font-size: 1.25rem;
    }

    .overlay-text p {
        font-size: 0.9rem;
    }

    .livestream-info {
        padding: 1.5rem;
    }

    .livestream-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stat-item {
        flex-direction: row;
        text-align: left;
        padding: 1rem;
    }

    .stat-icon {
        margin-bottom: 0;
        margin-right: 1rem;
        font-size: 1.5rem;
    }

    .stat-content {
        flex: 1;
    }

    .stat-value {
        font-size: 1.25rem;
    }
}

/* Loading Spinner */
.loading-spinner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 20;
    color: white;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

.loading-spinner p {
    margin: 0;
    font-size: 1rem;
    opacity: 0.9;
}

/* Small Mobile Devices */
@media (max-width: 576px) {
    .livestream {
        padding: 40px 0;
    }

    .livestream-player {
        aspect-ratio: 9/16;
        max-height: 100vh;
        max-width: 300px;
    }

    .play-button {
        width: 50px;
        height: 50px;
    }

    .play-button svg {
        width: 25px;
        height: 25px;
    }

    .overlay-text h4 {
        font-size: 1.1rem;
    }

    .overlay-text p {
        font-size: 0.8rem;
    }

    .livestream-info {
        padding: 1rem;
    }

    .spinner {
        width: 40px;
        height: 40px;
        border-width: 3px;
    }

    .loading-spinner p {
        font-size: 0.9rem;
    }
}

/* FAQ Section */
.faq {
    padding: 100px 0;
    background: linear-gradient(135deg, #f0f8ff, #e6f3ff);
    position: relative;
}

.faq::before {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='45' height='45'%3E%3Cpath fill='%23217EA7' d='M22.5 0c12.4 0 22.5 10.1 22.5 22.5S34.9 45 22.5 45 0 34.9 0 22.5 10.1 0 22.5 0zm0 3C11.7 3 3 11.7 3 22.5S11.7 42 22.5 42 42 33.3 42 22.5 33.3 3 22.5 3zm0 3c9.1 0 16.5 7.4 16.5 16.5S31.6 39 22.5 39 6 31.6 6 22.5 13.4 6 22.5 6z'/%3E%3C/svg%3E") repeat;
    opacity: 0.03;
}

.faq .section-header {
    margin-bottom: 50px;
}

.accordion-item {
    border: none;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.accordion-button {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    border: none;
    background-color: #fff;
    color: var(--text-color);
    position: relative;
    display: flex;
    align-items: center;
}

.accordion-button:not(.collapsed) {
    color: var(--primary-color);
    background-color: #fff;
    box-shadow: none;
}

.accordion-button::after {
    background-size: 1rem;
    transition: var(--transition);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: rgba(0, 0, 0, 0.1);
}

.accordion-button .bi-question-circle {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-right: 1rem;
}

.accordion-body {
    padding: 1.25rem 1.5rem;
    background-color: #fff;
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.6;
}

/* FAQ Mobile Styles */
@media (max-width: 768px) {
    .faq {
        padding: 60px 0;
    }

    .faq .section-header {
        margin-bottom: 30px;
    }

    .accordion-button {
        padding: 1rem 1.25rem;
        font-size: 0.95rem;
    }

    .accordion-body {
        padding: 1rem 1.25rem;
        font-size: 0.9rem;
    }

    .accordion-button .bi-question-circle {
        font-size: 1.1rem;
    }
}

/* Small Mobile Devices */
@media (max-width: 576px) {
    .accordion-button {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }

    .accordion-body {
        padding: 0.875rem 1rem;
    }
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: var(--light-color);
    padding: 3rem 0 2rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: 100px 0 80px;
    }

    .feature-card {
        margin-bottom: 1rem;
    }

    .about-video {
        margin-bottom: 2rem;
    }
}

/* Animations */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.hero-image img {
    animation: float 4s ease-in-out infinite;
}

/* Modal Styles */
.modal-content {
    border-radius: var(--border-radius);
    overflow: hidden;
}

.modal-body {
    padding: 0;
}

/* Loading Animation */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--light-color);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid var(--background-color);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scroll Behavior */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 76px; /* 与header高度相匹配 */
}

/* Sections Padding */
section {
    padding: 100px 0;
    position: relative;
    background: var(--light-color);
}

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

@media (max-width: 768px) {
    body {
        padding-top: 62px; /* 移动端导航栏较小 */
    }

    .header {
        height: 62px;
    }

    html {
        scroll-padding-top: 62px;
    }

    section {
        padding: 80px 0;
    }

    .hero {
        padding: 100px 0 80px;
    }
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-color);
    opacity: 0.8;
    max-width: 800px;
    margin: 0 auto;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    section {
        padding: 80px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero {
        padding: 100px 0 80px;
    }

    .navbar-brand h1 {
        font-size: 1.5rem;
    }

    .navbar-collapse {
        background: var(--light-color);
        padding: 1rem;
        border-radius: var(--border-radius);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        margin-top: 0.5rem;
    }

    .nav-item {
        margin: 0.5rem 0;
    }

    .nav-link {
        text-align: center;
        padding: 0.75rem 1rem;
    }
}

/* Container Adjustments */
.container {
    padding-left: 30px;
    padding-right: 30px;
}

@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}