/* ===== 基础变量与重置 ===== */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    --bg-dark: #0f0f23;
    --bg-card: #1a1a3e;
    --bg-card-hover: #222252;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(99, 102, 241, 0.2);
    --border-accent: rgba(245, 158, 11, 0.3);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-hero: linear-gradient(180deg, #0f0f23 0%, #1a1a3e 40%, #0f0f23 100%);
    --gradient-card: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
    --shadow-glow-accent: 0 0 30px rgba(245, 158, 11, 0.3);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled,
.navbar.has-bg {
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    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: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.15);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: 120px 24px 80px;
}

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

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 9, 30, 0.6) 0%, rgba(15, 15, 45, 0.75) 50%, rgba(10, 9, 30, 0.9) 100%);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--primary);
    border-radius: 50%;
    animation: float 6s infinite ease-in-out;
    opacity: 0;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0; }
    20% { opacity: 1; }
    50% { transform: translateY(-100px) scale(1.5); }
    80% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    overflow: visible;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 6px 20px;
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease;
}

.badge-glow {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(99, 102, 241, 0); }
}

.hero-title {
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.title-line {
    display: block;
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: 0.05em;
}

.title-sub {
    display: block;
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-weight: 400;
    color: var(--accent);
    margin-top: 8px;
    letter-spacing: 0.15em;
}

.hero-desc {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meta-item svg {
    width: 18px;
    height: 18px;
    color: var(--primary-light);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* 下载按钮包装器（用于二维码弹窗定位） */
.btn-download-wrapper {
    position: relative;
    display: inline-flex;
}

/* 二维码弹窗 */
.qr-popup {
    position: absolute;
    top: calc(100% + 16px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-md);
    padding: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: 9999;
    pointer-events: none;
}

.btn-download-wrapper:hover .qr-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.qr-popup-inner {
    text-align: center;
}

.qr-popup-inner canvas,
.qr-popup-inner img {
    display: block;
    width: 160px;
    height: 160px;
    border-radius: 8px;
}

.qr-popup-inner p {
    margin-top: 12px;
    color: #1a1a3e;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-primary);
    color: white;
    padding: 14px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.5);
}

.btn-primary svg {
    width: 20px;
    height: 20px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    padding: 14px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.05rem;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-secondary svg {
    width: 18px;
    height: 18px;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

.hero-scroll svg {
    width: 24px;
    height: 24px;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-8px); }
}

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

/* ===== 通用 Section 样式 ===== */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 500px;
    margin: 0 auto;
}

.section-header.light .section-title {
    -webkit-text-fill-color: white;
    background: none;
}

.section-header.light .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

/* ===== 游戏简介 ===== */
.intro {
    background: var(--bg-dark);
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.intro-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
    transition: transform 0.5s ease;
}

.intro-image:hover img {
    transform: scale(1.05);
}

.image-border {
    position: absolute;
    inset: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    pointer-events: none;
}

.intro-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1rem;
    line-height: 1.8;
}

.intro-lead {
    font-size: 1.2rem !important;
    color: var(--text-primary) !important;
    font-weight: 600;
    margin-bottom: 20px !important;
}

.intro-stats {
    display: flex;
    gap: 32px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== 特色玩法 ===== */
.features {
    background: var(--bg-card);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    position: relative;
}

.feature-card {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--shadow-glow);
    background: var(--bg-card-hover);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-card);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary-light);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== 上线福利 ===== */
.welfare {
    background: var(--bg-dark);
}

.welfare-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.welfare-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.welfare-card:hover {
    transform: translateY(-2px);
    border-color: rgba(245, 158, 11, 0.3);
    box-shadow: var(--shadow-glow-accent);
}

.welfare-card.highlight {
    border-color: var(--border-accent);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(239, 68, 68, 0.04) 100%);
}

.welfare-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--gradient-accent);
    color: white;
    padding: 2px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.welfare-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.welfare-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.welfare-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== 游戏截图 ===== */
.screenshots {
    background: var(--bg-card);
}

.screenshot-gallery {
    max-width: 900px;
    margin: 0 auto;
}

.screenshot-main {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 16/9;
}

.screenshot-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.screenshot-thumbs {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 4px 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.screenshot-thumbs::-webkit-scrollbar {
    display: none;
}

.thumb {
    flex-shrink: 0;
    width: 120px;
    height: 68px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    opacity: 0.5;
}

.thumb:hover {
    opacity: 0.8;
}

.thumb.active {
    opacity: 1;
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

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

/* ===== 游戏攻略 ===== */
.guide {
    background: var(--bg-dark);
}

.guide-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.guide-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 36px;
    text-align: center;
    transition: var(--transition);
}

.guide-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: var(--shadow-glow);
}

.guide-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--gradient-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}

.guide-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary-light);
}

.guide-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.guide-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.guide-link {
    display: inline-block;
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.guide-link:hover {
    color: var(--accent);
}

/* ===== 下载区域 ===== */
.download {
    position: relative;
    background: linear-gradient(135deg, #1e1b4b 0%, #0f0f23 50%, #1a0f2e 100%);
    overflow: hidden;
}

.download-overlay {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 30%, rgba(99, 102, 241, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 70%, rgba(245, 158, 11, 0.15) 0%, transparent 50%);
}

.download-content {
    position: relative;
    z-index: 1;
    max-width: 500px;
    margin: 0 auto;
}

.download-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.download-qr {
    margin-bottom: 32px;
    text-align: center;
}

.download-qr canvas,
.download-qr img {
    display: block;
    width: 160px;
    height: 160px;
    margin: 0 auto;
    border-radius: var(--radius-sm);
    background: white;
    padding: 8px;
}

.qr-tip {
    margin-top: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.download-icon-app {
    width: 72px;
    height: 72px;
    margin: 0 auto 16px;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.download-icon-app img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.download-info h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 4px;
}

.download-ver {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.download-type {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    margin-bottom: 32px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-download svg {
    width: 22px;
    height: 22px;
}

.btn-download.ios {
    background: white;
    color: #1a1a3e;
}

.btn-download.ios:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
}

.btn-download.android {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-download.android:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.footer {
    background: #0a0a1a;
    border-top: 1px solid var(--border);
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 64px;
    margin-bottom: 40px;
}

.footer-brand {
    text-align: left;
}

.footer-brand img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.footer-brand h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary-light);
}

.footer-friends {
    padding-top: 32px;
    border-top: 1px solid var(--border);
    margin-bottom: 32px;
}

.footer-friends h4 {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-align: center;
}

.friends-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.friends-links a {
    display: inline-block;
    padding: 6px 14px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 50px;
    transition: var(--transition);
}

.friends-links a:hover {
    color: var(--primary-light);
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.1);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.6);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ===== 动画可见 ===== */
.animate-visible {
    animation: fadeInUp 0.6s ease both;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .intro-image {
        max-width: 500px;
        margin: 0 auto;
    }

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

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

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(15, 15, 35, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-meta {
        gap: 16px;
    }

    .meta-item {
        font-size: 0.8rem;
    }

    section {
        padding: 64px 0;
    }

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

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

    .guide-content {
        grid-template-columns: 1fr;
    }

    .screenshot-thumbs {
        gap: 8px;
    }

    .thumb {
        width: 80px;
        height: 48px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .download-card {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary,
    .hero-buttons .btn-download-wrapper {
        width: 100%;
        max-width: 280px;
    }

    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        justify-content: center;
    }

    .hero-buttons .btn-download-wrapper .btn-primary {
        width: 100%;
        max-width: none;
    }

    .intro-stats {
        justify-content: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .back-to-top {
        bottom: 16px;
        right: 16px;
    }
}