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

:root {
    --primary-color: #4A9EFF;
    --primary-dark: #3A8EEF;
    --primary-light: #6BB0FF;
    --accent-color: #5AA5FF;
    --dark-bg: #1A1D23;
    --secondary-bg: #21252B;
    --card-bg: #282C34;
    --light-bg: #f8f9fa;
    --text-dark: #2d3436;
    --text-light: #ffffff;
    --text-secondary: #ABB2BF;
    --border-color: #3E4451;
    --success-color: #98C379;
    --warning-color: #E5C07B;
    --error-color: #E06C75;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* ==================== 英雄区域 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    opacity: 0.05;
    z-index: -1;
}

.hero .container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 30px;
    color: var(--text-dark);
    overflow: visible;
}

.title-line {
    display: block;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    overflow: visible;
    opacity: 0;
    transform: translateY(30px) scale(0.9);
    animation: titleFadeInScale 1s ease-out forwards;
}

.title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.title-line:nth-child(2) {
    animation-delay: 0.5s;
}

.hero-subtitle {
    font-size: 20px;
    color: #666;
    margin-bottom: 50px;
    line-height: 1.8;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1s forwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.3s forwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-icon {
    width: 22px;
    height: 22px;
    position: relative;
    z-index: 1;
}

.btn span {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--text-light);
    box-shadow: 0 10px 25px rgba(74, 158, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(74, 158, 255, 0.5);
}

.btn-secondary {
    background: var(--text-dark);
    color: var(--text-light);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    background: #1a1a1a;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: rgba(74, 158, 255, 0.1);
    border-radius: 50px;
    border: 2px solid var(--primary-color);
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.6s forwards, pulse 2s ease-in-out 2.6s infinite;
}

.badge {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.badge-text {
    color: var(--primary-color);
    font-weight: 600;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-arrow {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
    stroke-width: 2;
    animation: scrollBounce 2s ease-in-out infinite;
    cursor: pointer;
    transition: var(--transition);
}

.scroll-arrow:hover {
    color: var(--primary-dark);
    transform: scale(1.1);
}

/* ==================== 功能特性 ==================== */
.features {
    padding: 100px 0;
    background: var(--light-bg);
}

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

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 18px;
    color: #666;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    stroke: white;
    stroke-width: 2;
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.feature-desc {
    color: #666;
    line-height: 1.8;
}

/* ==================== 界面预览 ==================== */
.screenshots {
    padding: 100px 0;
    background: var(--dark-bg);
    overflow: hidden;
}

.screenshots .section-title {
    color: var(--text-light);
}

.screenshots .section-subtitle {
    color: var(--text-secondary);
}

.screenshots-carousel {
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 80px;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
}

.carousel-slide {
    min-width: calc(100% - 160px);
    width: calc(100% - 160px);
    flex-shrink: 0;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.carousel-slide img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.carousel-control:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.carousel-control svg {
    width: 28px;
    height: 28px;
    stroke: white;
    stroke-width: 3;
}

.carousel-control.prev {
    left: 0;
}

.carousel-control.next {
    right: 0;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
}

.carousel-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    padding: 0;
}

.carousel-indicator.active {
    background: var(--primary-color);
    width: 40px;
    border-radius: 6px;
}

.carousel-indicator:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* ==================== 下载区域 ==================== */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
}

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

.download-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
}

.download-desc {
    font-size: 18px;
    margin-bottom: 30px;
    line-height: 1.8;
    opacity: 0.9;
}

.download-features {
    list-style: none;
}

.download-features li {
    font-size: 18px;
    margin-bottom: 15px;
    padding-left: 40px;
    position: relative;
    display: flex;
    align-items: center;
}

.download-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 26px;
    height: 26px;
    background: #10B981;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
    line-height: 1;
}

.download-box {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.download-card {
    text-align: center;
    margin-bottom: 30px;
}

.download-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.download-icon svg {
    width: 40px;
    height: 40px;
    stroke: white;
    stroke-width: 2;
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.download-size {
    opacity: 0.8;
    margin-bottom: 20px;
}

.btn-download {
    background: white;
    color: var(--primary-color);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    display: inline-block;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.download-note {
    margin-top: 15px;
    opacity: 0.8;
    font-size: 14px;
}

.download-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.download-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    text-decoration: none;
    color: white;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(5px);
}

.download-link svg {
    width: 24px;
    height: 24px;
}

/* ==================== 关于 ==================== */
.about {
    padding: 100px 0;
    background: var(--light-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
}

.about-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.about-desc {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    color: #666;
    font-size: 14px;
}

.about-links h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.link-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 25px;
    background: white;
    border-radius: 15px;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.link-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    color: var(--primary-color);
}

.link-card svg {
    width: 32px;
    height: 32px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--dark-bg);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 30px;
}

.footer-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    text-align: center;
}

.footer-brand h3 {
    color: white;
    font-size: 24px;
    font-weight: 700;
    margin: 0;
}

.footer-logo {
    width: 50px;
    height: 50px;
}

.footer-desc {
    opacity: 0.7;
    font-size: 14px;
}

.footer-links-row {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

.footer-link svg {
    width: 18px;
    height: 18px;
}

.footer-link:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 10px;
    opacity: 0.7;
    font-size: 14px;
}

.footer-note {
    font-size: 12px;
}

.footer-icp {
    margin-top: 10px;
    font-size: 12px;
}

.footer-icp a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    stroke: white;
    stroke-width: 2;
}

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

@keyframes titleFadeInScale {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

@keyframes scrollBounce {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(10px);
        opacity: 0.7;
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 968px) {
    .download-content,
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: 20px;
        box-shadow: var(--shadow);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-carousel {
        padding: 0 60px;
    }
    
    .carousel-control {
        width: 50px;
        height: 50px;
    }
    
    .carousel-control svg {
        width: 24px;
        height: 24px;
    }
    
    .link-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-links-row {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .download-title,
    .about-title {
        font-size: 32px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .screenshots-carousel {
        padding: 0 40px;
    }
    
    .carousel-control {
        width: 40px;
        height: 40px;
    }
    
    .carousel-control svg {
        width: 20px;
        height: 20px;
    }
}