/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 渐变配色 */
    --primary: #ff2e63;
    --primary-dark: #e91e63;
    --secondary: #08d9d6;
    --accent: #f9a826;
    --dark: #252a34;
    --darker: #1a1d24;
    --gray: #a0a4b0;
    --light: #f5f5f7;
    --white: #ffffff;
    
    /* 渐变色彩 */
    --gradient-main: linear-gradient(135deg, #ff2e63 0%, #08d9d6 100%);
    --gradient-warm: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    --gradient-cool: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.18);
    --shadow-glow: 0 0 40px rgba(255, 46, 99, 0.3);
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 字体 */
    --font-main: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
}

body {
    font-family: var(--font-main);
    background: var(--darker);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 通用工具类 */
.gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 加载动画 ===== */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--darker);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.8s ease;
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

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

.skate-icon {
    font-size: 64px;
    margin-bottom: 20px;
    display: inline-block;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

.loading-text {
    font-size: 32px;
    font-weight: 900;
    letter-spacing: 4px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
}

.loading-bar-fill {
    height: 100%;
    background: var(--gradient-main);
    border-radius: 2px;
    animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
    0% {
        width: 0%;
    }
    50% {
        width: 100%;
    }
    100% {
        width: 100%;
    }
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(26, 29, 36, 0.9);
    backdrop-filter: blur(20px);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 15px 50px;
    background: rgba(26, 29, 36, 0.95);
    box-shadow: var(--shadow-md);
}

.logo {
    font-size: 24px;
    font-weight: 900;
    letter-spacing: 3px;
}

.logo-main {
    color: var(--white);
}

.logo-accent {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 40px;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--secondary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

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

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.85);
    transform: scale(1.05);
    animation: slowZoom 20s ease-in-out infinite alternate;
}

@keyframes slowZoom {
    0% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1.15);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(26, 29, 36, 0.7) 50%,
        var(--darker) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
    max-width: 1200px;
    width: 100%;
}

.hero-tagline {
    font-size: 18px;
    font-weight: 600;
    color: var(--secondary);
    letter-spacing: 8px;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: clamp(60px, 10vw, 120px);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
}

.title-line {
    display: block;
    color: var(--white);
    letter-spacing: 5px;
    animation: fadeInUp 1s ease;
}

.title-line.gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    display: block;
    font-size: 24px;
    font-weight: 400;
    color: var(--gray);
    margin-top: 20px;
    letter-spacing: 2px;
    animation: fadeInUp 1.2s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-desc {
    font-size: 18px;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto 40px;
    animation: fadeInUp 1.4s ease;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    animation: fadeInUp 1.6s ease;
}

.btn {
    padding: 16px 40px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-main);
    color: var(--white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(255, 46, 99, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--secondary);
    color: var(--secondary);
}

.hero-stats {
    display: flex;
    gap: 80px;
    justify-content: center;
    animation: fadeInUp 1.8s ease;
}

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

.stat-num {
    font-size: 48px;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
    letter-spacing: 2px;
}

/* ===== 通用 Section 样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
    padding: 0 20px;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    letter-spacing: 4px;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== 板类介绍 ===== */
.culture-section {
    padding: 120px 50px;
    background: var(--darker);
}

.boards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.board-card {
    background: var(--dark);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.board-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.board-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease;
}

.board-card:hover .board-image {
    transform: scale(1.05);
}

.board-info {
    padding: 30px;
}

.board-info h3 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--white);
}

.board-info p {
    font-size: 15px;
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.7;
}

.board-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.feature-tag {
    padding: 8px 16px;
    background: rgba(255, 46, 99, 0.1);
    border: 1px solid rgba(255, 46, 99, 0.2);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

.board-scene {
    font-size: 14px;
    color: var(--secondary);
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 500;
}

/* ===== 天地遨游轮播 ===== */
.journey-section {
    padding: 120px 50px;
    background: linear-gradient(180deg, var(--darker) 0%, var(--dark) 50%, var(--darker) 100%);
}

.journey-carousel {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.carousel-main {
    position: relative;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.scene-container {
    position: relative;
    height: 600px;
}

.scene {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease;
}

.scene.active {
    opacity: 1;
    visibility: visible;
}

.scene-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.8);
    animation: sceneZoom 8s ease-in-out infinite alternate;
}

@keyframes sceneZoom {
    0% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1.15);
    }
}

.scene-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        rgba(26, 29, 36, 0.85) 0%,
        rgba(26, 29, 36, 0.3) 60%,
        transparent 100%
    );
}

.scene-content {
    position: absolute;
    left: 60px;
    bottom: 60px;
    max-width: 500px;
    color: white;
    z-index: 10;
}

.scene-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    letter-spacing: 4px;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.scene-title {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.scene-quote {
    font-size: 20px;
    font-style: italic;
    color: var(--accent);
    margin-bottom: 25px;
    font-weight: 500;
}

.scene-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    margin-bottom: 30px;
}

.scene-boards {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.board-chip {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    backdrop-filter: blur(10px);
}

/* 轮播箭头 */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--white);
    font-size: 32px;
    cursor: pointer;
    z-index: 20;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.carousel-arrow:hover {
    background: var(--primary);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-glow);
}

.arrow-left {
    left: 30px;
}

.arrow-right {
    right: 30px;
}

/* 指示器 */
.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 30px;
}

.indicator {
    width: 50px;
    height: 4px;
    border: none;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--gradient-main);
    width: 80px;
}

/* ===== 文化理念区域 ===== */
.philosophy-section {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.philosophy-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.7);
}

.philosophy-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        var(--darker) 0%,
        transparent 30%,
        transparent 70%,
        var(--darker) 100%
    );
}

.philosophy-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1200px;
    padding: 0 20px;
}

.philosophy-tag {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    letter-spacing: 4px;
    margin-bottom: 20px;
}

.philosophy-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 900;
    margin-bottom: 30px;
    background: linear-gradient(135deg, #fff 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.philosophy-text {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 800px;
    margin: 0 auto 60px;
    line-height: 1.8;
}

.philosophy-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--white);
}

.feature-item p {
    font-size: 14px;
    color: var(--gray);
}

/* ===== 技巧教程区域 ===== */
.tutorial-section {
    padding: 120px 50px;
    background: var(--darker);
}

.tutorial-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 14px 30px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.1);
    background: transparent;
    color: var(--gray);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--gradient-main);
    color: var(--white);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.tab-btn:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.tutorial-card {
    background: var(--dark);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tutorial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary);
}

.tutorial-image {
    width: 100%;
    height: 220px;
    background-size: cover;
    background-position: center;
}

.tutorial-info {
    padding: 25px;
}

.tutorial-info h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--white);
}

.tutorial-info p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.difficulty {
    font-size: 14px;
    color: var(--accent);
    font-weight: 600;
}

/* ===== 画廊区域 ===== */
.gallery-section {
    padding: 120px 50px;
    background: linear-gradient(180deg, var(--darker) 0%, var(--dark) 100%);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 1;
    cursor: pointer;
    transition: var(--transition);
}

.gallery-item.big {
    grid-column: span 2;
    aspect-ratio: 2.05;
}

.gallery-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease;
}

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 40%,
        rgba(26, 29, 36, 0.95) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay h4 {
    font-size: 24px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 8px;
    transform: translateY(20px);
    transition: transform 0.3s ease 0.1s;
}

.gallery-item:hover .gallery-overlay h4 {
    transform: translateY(0);
}

.gallery-overlay p {
    font-size: 14px;
    color: var(--gray);
    transform: translateY(20px);
    transition: transform 0.3s ease 0.2s;
}

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

/* ===== 社区互动区域 ===== */
.community-section {
    padding: 120px 50px;
    background: var(--dark);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.community-item {
    background: var(--darker);
    border-radius: 25px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.community-item h3 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 30px;
    color: var(--white);
}

/* 留言板 */
.message-board {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.message-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message-form input,
.message-form textarea {
    width: 100%;
    padding: 15px 20px;
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: var(--white);
    font-family: var(--font-main);
    font-size: 15px;
    transition: var(--transition);
}

.message-form textarea {
    min-height: 100px;
    resize: vertical;
}

.message-form input:focus,
.message-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 46, 99, 0.1);
}

.message-form input::placeholder,
.message-form textarea::placeholder {
    color: var(--gray);
}

#send-message {
    padding: 14px 30px;
    background: var(--gradient-main);
    border: none;
    border-radius: 12px;
    color: var(--white);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

#send-message:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.message-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-height: 400px;
    overflow-y: auto;
}

.message-list::-webkit-scrollbar {
    width: 6px;
}

.message-list::-webkit-scrollbar-track {
    background: transparent;
}

.message-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.message-item {
    background: var(--dark);
    padding: 20px;
    border-radius: 15px;
    border-left: 3px solid var(--primary);
}

.message-user {
    font-size: 16px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.message-text {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 10px;
}

.message-time {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

/* 活动列表 */
.event-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.event-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--dark);
    border-radius: 15px;
    transition: var(--transition);
    border-left: 3px solid var(--secondary);
}

.event-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.event-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.event-details h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
}

.event-location,
.event-time {
    font-size: 14px;
    color: var(--secondary);
    margin-bottom: 5px;
    font-weight: 500;
}

.event-desc {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    margin-top: 10px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--darker);
    padding: 80px 50px 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    max-width: 1400px;
    margin: 0 auto 50px;
}

.footer-main p {
    font-size: 15px;
    color: var(--gray);
    margin-top: 20px;
    line-height: 1.8;
    max-width: 400px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 3px;
}

.footer-logo span:first-child {
    color: var(--white);
}

.footer-links-group h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 25px;
    letter-spacing: 1px;
}

.footer-links-group a {
    display: block;
    font-size: 14px;
    color: var(--gray);
    text-decoration: none;
    margin-bottom: 15px;
    transition: var(--transition);
}

.footer-links-group a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom span {
    font-size: 14px;
    color: var(--gray);
}

/* ===== 滚动渐入动画类（优化性能） ===== */
.fade-in-init {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 渐变色背景（取代外部图片，彻底解决卡顿） ===== */

/* Hero 首页背景 - 深色渐变 */
.hero-image-home {
    background: linear-gradient(135deg, #1a1d24 0%, #2d3561 30%, #ff2e63 70%, #ff9a9e 100%);
}

/* 板类介绍 - 4个不同渐变 */
.board-image-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.board-image-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}
.board-image-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}
.board-image-4 {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

/* 天地遨游轮播 - 4个场景渐变 */
.scene-image-1 {
    background: linear-gradient(135deg, #e0eafc 0%, #cfdef3 50%, #667eea 100%);
}
.scene-image-2 {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 50%, #ff9a9e 100%);
}
.scene-image-3 {
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
}
.scene-image-4 {
    background: linear-gradient(135deg, #a8e063 0%, #56ab2f 50%, #2e8b57 100%);
}

/* 理念区域背景 */
.philosophy-bg-1 {
    background: linear-gradient(180deg, #1a1d24 0%, #2d3561 50%, #ff2e63 100%);
}

/* 教程区域 - 9个渐变 */
.tutorial-image-1 {
    background: linear-gradient(135deg, #c471f5 0%, #fa71cd 100%);
}
.tutorial-image-2 {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}
.tutorial-image-3 {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
}
.tutorial-image-4 {
    background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%);
}
.tutorial-image-5 {
    background: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%);
}
.tutorial-image-6 {
    background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%);
}
.tutorial-image-7 {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}
.tutorial-image-8 {
    background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
}
.tutorial-image-9 {
    background: linear-gradient(135deg, #ff6e7f 0%, #bfe9ff 100%);
}

/* 画廊区域 - 6个渐变 */
.gallery-image-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.gallery-image-2 {
    background: linear-gradient(135deg, #2af598 0%, #009efd 100%);
}
.gallery-image-3 {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}
.gallery-image-4 {
    background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
}
.gallery-image-5 {
    background: linear-gradient(135deg, #fccb90 0%, #d57eeb 100%);
}
.gallery-image-6 {
    background: linear-gradient(135deg, #ff6e7f 0%, #bfe9ff 100%);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .navbar {
        padding: 15px 30px;
    }

    .nav-links {
        gap: 25px;
    }

    .hero-stats {
        gap: 50px;
    }

    .culture-section,
    .journey-section,
    .tutorial-section,
    .gallery-section,
    .community-section {
        padding: 80px 30px;
    }

    .scene-content {
        left: 40px;
        bottom: 40px;
        max-width: 400px;
    }

    .scene-title {
        font-size: 36px;
    }

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

    .gallery-item.big {
        grid-column: span 2;
    }

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

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 15px 20px;
        gap: 15px;
    }

    .nav-links {
        gap: 20px;
    }

    .nav-links a {
        font-size: 14px;
    }

    .hero-title {
        font-size: 60px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

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

    .section-title {
        font-size: 36px;
    }

    .scene-container {
        height: 500px;
    }

    .scene-content {
        left: 30px;
        bottom: 30px;
        right: 30px;
    }

    .scene-title {
        font-size: 28px;
    }

    .scene-quote {
        font-size: 16px;
    }

    .scene-desc {
        font-size: 14px;
    }

    .carousel-arrow {
        width: 45px;
        height: 45px;
        font-size: 24px;
    }

    .arrow-left {
        left: 15px;
    }

    .arrow-right {
        right: 15px;
    }

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

    .gallery-item.big {
        grid-column: span 1;
        aspect-ratio: 1;
    }

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

    .footer {
        padding: 60px 20px 20px;
    }

    .philosophy-section {
        height: 500px;
    }

    .philosophy-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-title {
        font-size: 48px;
        letter-spacing: 2px;
    }

    .title-sub {
        font-size: 18px;
    }

    .boards-grid,
    .tutorial-grid {
        grid-template-columns: 1fr;
    }

    .tutorial-tabs {
        flex-direction: column;
        width: 100%;
    }

    .tab-btn {
        width: 100%;
    }

    .philosophy-features {
        grid-template-columns: 1fr;
    }

    .indicator {
        width: 30px;
    }

    .indicator.active {
        width: 50px;
    }
}