/* ============================================
   PeaceHaven 拾光录 - 长安营地官网样式
   日间 / 夜间双主题
   ============================================ */

/* === CSS Variables - Day Theme === */
:root, [data-theme="day"] {
    --bg-primary: #FFF8F0;
    --bg-secondary: #FFF1E6;
    --bg-card: #FFFFFF;
    --bg-card-hover: #FFFAF5;
    --bg-navbar: rgba(255, 248, 240, 0.92);
    --bg-footer: #3D2C1E;

    --text-primary: #3D2C1E;
    --text-secondary: #6B5344;
    --text-muted: #9B8A7D;
    --text-inverse: #FFF8F0;

    --accent-primary: #E8833A;
    --accent-secondary: #F4A460;
    --accent-tertiary: #FFB347;
    --accent-warm: #E8654A;
    --accent-gold: #DAA520;

    --gradient-hero: linear-gradient(135deg, #E8833A 0%, #F4A460 40%, #FFB347 100%);
    --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #FFF5EB 100%);
    --gradient-accent: linear-gradient(135deg, #E8833A, #E8654A);
    --gradient-footer: linear-gradient(180deg, #3D2C1E 0%, #2A1D12 100%);

    --shadow-sm: 0 2px 8px rgba(61, 44, 30, 0.08);
    --shadow-md: 0 4px 20px rgba(61, 44, 30, 0.12);
    --shadow-lg: 0 8px 40px rgba(61, 44, 30, 0.16);
    --shadow-glow: 0 0 30px rgba(232, 131, 58, 0.3);

    --border-color: rgba(232, 131, 58, 0.15);
    --border-card: 1px solid rgba(232, 131, 58, 0.1);

    --particle-color: rgba(232, 131, 58, 0.4);
}

/* === CSS Variables - Night Theme === */
[data-theme="night"] {
    --bg-primary: #1A1420;
    --bg-secondary: #221A2E;
    --bg-card: #2A2038;
    --bg-card-hover: #332845;
    --bg-navbar: rgba(26, 20, 32, 0.95);
    --bg-footer: #0F0A16;

    --text-primary: #F0E6D8;
    --text-secondary: #C8B8A8;
    --text-muted: #8A7A6A;
    --text-inverse: #1A1420;

    --accent-primary: #F4A460;
    --accent-secondary: #E8833A;
    --accent-tertiary: #FFB347;
    --accent-warm: #FF7F50;
    --accent-gold: #FFD700;

    --gradient-hero: linear-gradient(135deg, #2A1D3E 0%, #1A1420 40%, #2A2038 100%);
    --gradient-card: linear-gradient(145deg, #2A2038 0%, #332845 100%);
    --gradient-accent: linear-gradient(135deg, #F4A460, #FF7F50);
    --gradient-footer: linear-gradient(180deg, #0F0A16 0%, #080510 100%);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(244, 164, 96, 0.25);

    --border-color: rgba(244, 164, 96, 0.15);
    --border-card: 1px solid rgba(244, 164, 96, 0.1);

    --particle-color: rgba(244, 164, 96, 0.3);
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

html::-webkit-scrollbar {
    display: none; /* Chrome/Safari/Opera */
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

/* === Navbar === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-navbar);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.4s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.2rem;
}

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

.logo-text {
    font-family: 'Noto Serif SC', serif;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.3rem;
    font-weight: 700;
}

.logo-full {
    /* 默认显示完整名称，移动端隐藏 */
}

@media (max-width: 768px) {
    .logo-full { display: none; }
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-primary);
    background: rgba(232, 131, 58, 0.08);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: rgba(232, 131, 58, 0.1);
    transform: rotate(15deg);
}

[data-theme="day"] .theme-icon-night { display: none; }
[data-theme="night"] .theme-icon-day { display: none; }

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

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

.nav-hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}
.nav-hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero Section === */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-carousel {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.carousel-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0,0,0,0.25) 0%,
        rgba(0,0,0,0.05) 40%,
        rgba(0,0,0,0.35) 100%
    );
}

[data-theme="night"] .slide-overlay {
    background: linear-gradient(
        180deg,
        rgba(10,5,20,0.45) 0%,
        rgba(10,5,20,0.15) 40%,
        rgba(10,5,20,0.5) 100%
    );
}

.carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    pointer-events: none;
}

.carousel-btn {
    pointer-events: all;
    width: 48px;
    height: 48px;
    border: 2px solid rgba(255,255,255,0.5);
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.8);
    transform: scale(1.1);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: 0 24px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    letter-spacing: 2px;
    margin-bottom: 24px;
    animation: fadeInDown 0.8s ease 0.2s both;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.hero-title {
    margin-bottom: 20px;
    animation: fadeInDown 0.8s ease 0.4s both;
}

.title-en {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 4px;
    text-shadow:
        0 0 1px rgba(255,200,120,0.6),
        0 1px 6px rgba(0,0,0,0.35);
    line-height: 1.2;
    -webkit-text-stroke: 0.3px rgba(255,220,160,0.3);
}

.title-cn {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 8px;
    margin-top: 8px;
    opacity: 0.9;
    text-shadow: 0 0 1px rgba(255,200,120,0.5), 0 1px 4px rgba(0,0,0,0.3);
}

.hero-slogan {
    font-size: 1.1rem;
    letter-spacing: 3px;
    opacity: 0.9;
    margin-bottom: 36px;
    text-shadow: 0 0 1px rgba(255,200,120,0.5), 0 1px 4px rgba(0,0,0,0.3);
    animation: fadeInDown 0.8s ease 0.6s both;
}

.hero-cta {
    display: inline-block;
    padding: 14px 36px;
    background: var(--gradient-accent);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 2px;
    box-shadow: 0 4px 20px rgba(232, 131, 58, 0.4);
    border: 1px solid rgba(255,220,160,0.25);
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease 0.8s both;
    text-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(232, 131, 58, 0.5);
}

/* === Section Common === */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 4px;
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    margin: 0 auto;
    border-radius: 3px;
}

/* === About Section === */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-lead {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.stat-item {
    text-align: center;
    padding: 16px 8px;
    background: var(--bg-card);
    border-radius: 12px;
    border: var(--border-card);
    box-shadow: var(--shadow-sm);
}

.stat-number {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.about-img-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-img-wrapper img {
    width: 100%;
    border-radius: 16px;
    transition: transform 0.6s ease;
}

.about-img-wrapper:hover img {
    transform: scale(1.05);
}

.about-img-frame {
    position: absolute;
    inset: 12px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 12px;
    pointer-events: none;
}

/* === Team Section === */
.team {
    background: var(--bg-primary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.team-card {
    position: relative;
    background: var(--gradient-card);
    border-radius: 20px;
    padding: 36px 24px 28px;
    text-align: center;
    border: var(--border-card);
    overflow: hidden;
    transition: all 0.4s ease;
    cursor: default;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.team-card:hover .card-glow {
    opacity: 0.06;
}

.card-border {
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary), var(--accent-warm));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.team-card:hover .card-border {
    opacity: 1;
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-avatar {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 16px;
}

.card-avatar img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-ring {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 3px solid transparent;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: ringRotate 4s linear infinite;
}

.card-role {
    display: inline-block;
    padding: 4px 16px;
    background: var(--gradient-accent);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.card-name {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.card-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 16px;
    line-height: 1.6;
}

.card-tags {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 12px;
    background: rgba(232, 131, 58, 0.08);
    color: var(--accent-primary);
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

/* === Activities Section === */
.activities {
    background: var(--bg-secondary);
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.activity-card {
    display: block;
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: var(--border-card);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
}

.activity-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.activity-img {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.activity-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.activity-date-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient-accent);
    color: white;
    padding: 8px 12px;
    border-radius: 12px;
    text-align: center;
    line-height: 1.2;
    box-shadow: 0 4px 12px rgba(232, 131, 58, 0.3);
}

.date-month {
    display: block;
    font-size: 0.65rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.date-day {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
}

.activity-info {
    padding: 20px;
}

.activity-period {
    font-size: 0.72rem;
    color: var(--accent-primary);
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.activity-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.activity-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.activity-view-count {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.activity-view-count .eye-icon {
    font-size: 0.95rem;
    opacity: 0.7;
}

.activities-more {
    text-align: center;
    margin-top: 40px;
}

.btn-more {
    display: inline-block;
    padding: 12px 32px;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.btn-more:hover {
    background: var(--gradient-accent);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* === Benefits Section === */
.benefits {
    background: var(--bg-primary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.benefit-card {
    background: var(--gradient-card);
    border: var(--border-card);
    border-radius: 20px;
    padding: 36px 24px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.benefit-card:hover::before {
    transform: scaleX(1);
}

.benefit-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.benefit-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.benefit-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.benefit-highlight {
    display: inline-block;
    padding: 4px 16px;
    background: rgba(232, 131, 58, 0.1);
    color: var(--accent-primary);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
}

/* === Footer === */
.footer {
    background: var(--gradient-footer);
    color: var(--text-inverse);
    position: relative;
    padding-top: 40px;
    margin-top: 60px;
}

[data-theme="night"] .footer {
    color: #C8B8A8;
}

.footer-wave {
    position: absolute;
    top: -60px;
    left: 0;
    right: 0;
    color: var(--bg-footer);
    line-height: 0;
}

.footer-wave svg {
    width: 100%;
    height: 60px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.footer-logo .logo-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-secondary);
}

.footer-logo .logo-icon {
    width: 72px;
    height: 72px;
}

.footer-motto {
    font-size: 0.9rem;
    opacity: 0.7;
    line-height: 1.8;
    font-style: italic;
}

.footer-links h4,
.footer-contact h4 {
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--accent-secondary);
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    font-size: 0.85rem;
    opacity: 0.7;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--accent-tertiary);
    padding-left: 4px;
}

.footer-contact p {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-bottom: 8px;
}

.footer-contact strong {
    color: var(--accent-tertiary);
}

.footer-bottom {
    text-align: center;
    padding: 28px 0;
}

.footer-slogan {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.1rem;
    letter-spacing: 3px;
    margin-bottom: 12px;
    color: var(--accent-secondary);
    opacity: 0.9;
}

.footer-copyright {
    font-size: 0.75rem;
    opacity: 0.5;
}

.footer-icp {
    font-size: 0.7rem;
    opacity: 0.4;
    margin-top: 4px;
}

.footer-icp a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer-icp a:hover {
    opacity: 1;
    text-decoration: underline;
}

/* === Scroll Progress Dots === */
.scroll-dots {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 998;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: center;
}

.scroll-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
    opacity: 0.25;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.scroll-dot::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 1.5px solid var(--accent-primary);
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-dot.active {
    opacity: 1;
    transform: scale(1.3);
    box-shadow: 0 0 12px var(--accent-primary);
}

.scroll-dot.active::before {
    opacity: 1;
    transform: scale(1);
}

.scroll-dot:hover {
    opacity: 0.7;
    transform: scale(1.15);
}

.scroll-dot.active:hover {
    opacity: 1;
    transform: scale(1.3);
}

/* Tooltip for scroll dots */
.scroll-dot::after {
    content: attr(title);
    position: absolute;
    right: calc(100% + 14px);
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    padding: 4px 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.72rem;
    font-weight: 500;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.scroll-dot:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

/* === Back to Top === */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

/* === Particle Canvas === */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* === Animations === */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50% { transform: rotate(45deg) translateY(8px); }
}

@keyframes ringRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Fade-in on scroll */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }
.fade-in:nth-child(5) { transition-delay: 0.4s; }
.fade-in:nth-child(6) { transition-delay: 0.5s; }

/* === Responsive === */
@media (max-width: 1024px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-content {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    html { font-size: 15px; }

    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-navbar);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px 24px;
        gap: 4px;
        transform: translateY(-200%);
        transition: transform 0.4s ease;
        border-bottom: 1px solid var(--border-color);
        z-index: 999;
    }

    .nav-links.open {
        transform: translateY(0);
    }

    .nav-hamburger {
        display: flex;
    }

    .title-en { font-size: 2.6rem; }
    .title-cn { font-size: 1.3rem; }
    .hero-slogan { font-size: 0.95rem; }

    /* Mobile Hero: 文字与轮播分割布局 */
    .hero {
        height: auto;
        min-height: auto;
        flex-direction: column;
        overflow: visible;
    }

    .hero-content {
        position: relative;
        z-index: 2;
        width: 100%;
        padding: 100px 24px 48px;
        background: var(--bg-primary);
        color: var(--text-primary);
        order: 1;
    }

    .hero-badge {
        background: rgba(232, 131, 58, 0.1);
        border-color: var(--border-color);
        color: var(--accent-primary);
        text-shadow: none;
        backdrop-filter: none;
    }

    .title-en {
        font-size: 2.6rem;
        color: var(--text-primary);
        text-shadow:
            0 0 1px rgba(232,131,58,0.4),
            0 1px 3px rgba(0,0,0,0.08);
    }

    .title-cn {
        font-size: 1.3rem;
        color: var(--text-secondary);
        text-shadow: none;
    }

    .hero-slogan {
        font-size: 0.95rem;
        color: var(--text-secondary);
        text-shadow: none;
    }

    .hero-carousel {
        position: relative;
        width: 100%;
        height: 56.25vw;
        max-height: none;
        min-height: 200px;
        order: 2;
        flex-shrink: 0;
    }

    .carousel-slide {
        background-size: cover;
        background-position: center;
    }

    .slide-overlay {
        background: rgba(0,0,0,0.1);
    }

    .carousel-controls {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .section { padding: 70px 0; }
    .section-title { font-size: 1.8rem; }
    .section-header { margin-bottom: 40px; }

    .footer {
        padding-top: 0;
        margin-top: 30px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .activities-grid {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 28px;
        text-align: center;
    }

    .footer-logo { justify-content: center; }
}

@media (max-width: 480px) {
    html { font-size: 14px; }

    .title-en { font-size: 2rem; }
    .title-cn { font-size: 1.1rem; letter-spacing: 4px; }

    .hero-content { padding: 90px 16px 36px; }
    .hero-carousel { height: 56.25vw; min-height: 180px; }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .carousel-btn { width: 38px; height: 38px; font-size: 1rem; }

    .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }

    .scroll-dots { right: 10px; gap: 10px; }
    .scroll-dot { width: 8px; height: 8px; }
    .scroll-dot::after { display: none; }
}

/* ============================================
   Login Modal & User Area
   ============================================ */

/* User Area in Navbar */
.user-logged, .user-not-logged {
    display: flex;
    align-items: center;
    margin-left: 12px;
    position: relative;
}

.btn-login {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1px solid var(--accent-primary);
    background: transparent;
    color: var(--accent-primary);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s;
}

.btn-login:hover {
    background: var(--accent-primary);
    color: #fff;
}

/* User Nickname Button (logged in state) */
.user-nickname-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.25s;
    user-select: none;
}

.user-avatar-small {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    transition: opacity 0.3s;
    flex-shrink: 0;
}

.user-nickname-btn:hover {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
}

.user-nickname-btn:hover .user-nickname-text,
.user-nickname-btn:hover .user-dropdown-arrow {
    color: #fff;
}

.user-nickname-text {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-dropdown-arrow {
    font-size: 0.7rem;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.user-dropdown-arrow.open {
    transform: rotate(180deg);
}

/* User Dropdown */
.user-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    min-width: 180px;
    background: var(--bg-card);
    border: var(--border-card);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s;
    z-index: 1000;
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.dropdown-avatar-img {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 8px;
    display: block;
    border: 2px solid var(--border-color);
    transition: opacity 0.3s;
}

.dropdown-nickname {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.dropdown-role {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
}

.dropdown-logout {
    color: var(--accent-warm);
}

/* Nickname Setup Modal */
.nickname-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s;
}

.nickname-modal-overlay.show {
    opacity: 1;
}

.nickname-modal {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 32px;
    width: 90%;
    max-width: 380px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.nickname-modal h2 {
    margin: 0 0 8px;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.nickname-modal p {
    margin: 0 0 20px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.nickname-modal input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

.nickname-modal input:focus {
    border-color: var(--accent-primary);
}

.nickname-modal .btn-nickname-submit {
    margin-top: 16px;
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: var(--gradient-accent);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.nickname-modal .btn-nickname-submit:hover {
    opacity: 0.9;
}

.nickname-modal .nickname-message {
    margin-top: 12px;
    font-size: 0.85rem;
    min-height: 1.2em;
}

.nickname-modal .nickname-message.msg-error {
    color: var(--accent-warm);
}

.nickname-modal .nickname-message.msg-success {
    color: var(--accent-primary);
}

/* Camp Autocomplete */
.camp-autocomplete-wrapper {
    position: relative;
    margin-top: 12px;
}

.camp-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 10px 10px;
    max-height: 160px;
    overflow-y: auto;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.camp-suggestion-item {
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s;
}

.camp-suggestion-item:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
}

.dropdown-campname {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Login Modal Overlay */
.login-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.login-modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.login-modal {
    background: var(--bg-card);
    border-radius: 20px;
    width: 420px;
    max-width: 92vw;
    box-shadow: var(--shadow-lg);
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: transform 0.3s;
    overflow: hidden;
}

.login-modal-overlay.show .login-modal {
    transform: translateY(0) scale(1);
}

.login-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    z-index: 1;
}

.login-close:hover {
    background: var(--accent-warm);
    color: #fff;
}

.login-modal-header {
    padding: 32px 32px 0;
    text-align: center;
}

.login-modal-header h2 {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.login-modal-header p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.login-modal-body {
    padding: 28px 32px 32px;
}

.login-field {
    margin-bottom: 18px;
}

.login-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.login-field input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.login-field input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(232, 131, 58, 0.1);
}

.code-input-wrapper {
    display: flex;
    gap: 10px;
}

.code-input-wrapper input {
    flex: 1;
}

.btn-send-code {
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid var(--accent-primary);
    background: transparent;
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.btn-send-code:hover:not(:disabled) {
    background: var(--accent-primary);
    color: #fff;
}

.btn-send-code:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--text-muted);
    color: var(--text-muted);
}

.login-agreement {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 20px;
    font-size: 0.82rem;
}

.agreement-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    color: var(--text-secondary);
}

.agreement-label input[type="checkbox"] {
    accent-color: var(--accent-primary);
    width: 15px;
    height: 15px;
}

.agreement-link {
    color: var(--accent-primary);
    text-decoration: none;
}

.agreement-link:hover {
    text-decoration: underline;
}

.btn-login-submit {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: 12px;
    background: var(--gradient-accent);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
}

.btn-login-submit:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-login-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-message {
    text-align: center;
    font-size: 0.88rem;
    margin-top: 14px;
    min-height: 20px;
}

.msg-success { color: #4CAF50; }
.msg-error { color: #F44336; }

/* Mobile adjustments for login */
@media (max-width: 768px) {
    .user-logged, .user-not-logged {
        margin-left: 8px;
    }

    .btn-login {
        padding: 6px 14px;
        font-size: 0.82rem;
    }

    .user-avatar-btn {
        width: 32px;
        height: 32px;
    }

    .user-avatar-small {
        display: none;
    }

    .login-modal {
        width: 100%;
        max-width: 100vw;
        border-radius: 20px 20px 0 0;
        position: fixed;
        bottom: 0;
    }

    .login-modal-overlay {
        align-items: flex-end;
    }

    .login-modal-header { padding: 24px 24px 0; }
    .login-modal-body { padding: 20px 24px 32px; }
}