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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Microsoft YaHei", "PingFang SC", sans-serif;
    background: #000;
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.nav-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px;
    height: 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 500;
}

.nav-logo img {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

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

.nav-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 1px;
    transition: all 0.3s;
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 80px 24px 40px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, #1a1a2e 0%, #000 70%);
    z-index: -1;
}

.hero-content {
    max-width: 680px;
}

.hero-title {
    font-size: clamp(48px, 10vw, 80px);
    font-weight: 600;
    letter-spacing: -0.02em;
    background: linear-gradient(180deg, #fff 0%, #a8a8a8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(24px, 4vw, 32px);
    font-weight: 400;
    color: #86868b;
    margin-top: 8px;
}

.hero-desc {
    font-size: 17px;
    color: #86868b;
    margin-top: 16px;
    letter-spacing: 0.5px;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #0071e3;
    color: #fff;
    padding: 16px 32px;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    margin-top: 32px;
    transition: all 0.3s;
}

.hero-btn:hover {
    background: #0077ED;
    transform: scale(1.02);
}

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

.hero-version {
    font-size: 14px;
    color: #86868b;
    margin-top: 12px;
}

.hero-scroll-hint {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: #86868b;
    font-size: 12px;
    animation: float 2s ease-in-out infinite;
}

.hero-scroll-hint svg {
    width: 20px;
    height: 20px;
}

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

/* 通用区块样式 */
.section-header {
    text-align: center;
    padding: 80px 24px 60px;
}

.section-title {
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 20px;
    color: #86868b;
    margin-top: 8px;
}

/* 特性卡片 */
.features-section {
    background: #101014;
}

.features-grid {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px 80px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: #fff;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 15px;
    color: #86868b;
    line-height: 1.5;
}

/* AI 区域 */
.ai-section {
    background: linear-gradient(180deg, #101014 0%, #1d1d1f 100%);
    padding: 80px 24px;
}

.ai-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(102, 126, 234, 0.2);
    color: #a78bfa;
    padding: 8px 16px;
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.ai-badge svg {
    width: 16px;
    height: 16px;
}

.ai-title {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.ai-desc {
    font-size: 18px;
    color: #86868b;
    margin-top: 12px;
}

.ai-models {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
}

.ai-model {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 16px 24px;
    text-align: center;
    transition: all 0.3s;
}

.ai-model:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.02);
}

.model-name {
    display: block;
    font-size: 16px;
    font-weight: 600;
}

.model-desc {
    display: block;
    font-size: 13px;
    color: #86868b;
    margin-top: 4px;
}

.ai-features-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-top: 40px;
}

.ai-feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    color: #86868b;
}

.check-icon {
    color: #34c759;
    font-weight: 600;
}

/* 工具列表 */
.tools-section {
    background: #101014;
}

.tools-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #86868b;
    border: none;
    padding: 12px 24px;
    border-radius: 980px;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.tab-btn.active {
    background: #fff;
    color: #000;
}

.tools-grid {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px 80px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.tool-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 28px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: default;
    opacity: 1;
    transform: translateY(0);
}

.tool-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.tool-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.tool-icon svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

.tool-card h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.tool-card p {
    font-size: 13px;
    color: #86868b;
}

/* 安全区域 */
.security-section {
    background: #1d1d1f;
    padding: 80px 24px;
}

.security-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.security-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #34c759 0%, #30d158 100%);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.security-icon svg {
    width: 40px;
    height: 40px;
    color: #fff;
}

.security-content h2 {
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 600;
}

.security-content p {
    font-size: 18px;
    color: #86868b;
    margin-top: 12px;
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.security-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* 下载区域 */
.download-section {
    background: #101014;
    padding: 80px 24px;
}

.download-content {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.download-icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    margin-bottom: 24px;
}

.download-content h2 {
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 600;
}

.download-content > p {
    font-size: 18px;
    color: #86868b;
    margin-top: 8px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #0071e3;
    color: #fff;
    padding: 16px 32px;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    margin-top: 28px;
    transition: all 0.3s;
}

.download-btn:hover {
    background: #0077ED;
    transform: scale(1.02);
}

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

.download-size {
    display: block;
    font-size: 14px;
    color: #86868b;
    margin-top: 12px;
}

.download-password {
    display: inline-block;
    font-size: 16px;
    color: #ff6b6b;
    font-weight: 600;
    margin-top: 8px;
    padding: 6px 16px;
    background: rgba(255, 107, 107, 0.15);
    border-radius: 20px;
}

/* 截图区域 */
.screenshots-section {
    background: #000;
}

.screenshots-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px 80px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.screenshot-img {
    max-width: 280px;
    width: 100%;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s;
}

.screenshot-img:hover {
    transform: scale(1.02);
}

/* 底部 */
.footer {
    background: #1d1d1f;
    padding: 40px 24px;
}

.footer-content {
    max-width: 1024px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 20px;
}

.footer-brand img {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

.footer-icp {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    color: #86868b;
    flex-wrap: wrap;
}

.emblem {
    width: 20px;
    height: 20px;
}

.footer-icp a {
    color: #86868b;
    transition: color 0.3s;
}

.footer-icp a:hover {
    color: #fff;
}

/* 滚动动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-menu-btn {
        display: flex;
    }

    .hero-scroll-hint {
        display: none;
    }

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

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

    .ai-models {
        flex-direction: column;
        align-items: center;
    }

    .ai-model {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
}