body {
    margin: 0;
    font-family: "Segoe UI", sans-serif;
    background: #0a0a0f;
    color: #fff;
}

/* 导航 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 10;
}

.logo {
    font-size: 20px;
    font-weight: bold;
}

.navbar nav a {
    margin: 0 15px;
    color: #ccc;
    text-decoration: none;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 语言切换 */
.lang-switch {
    display: flex;
    gap: 4px;
}

.lang-btn {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.45);
    text-decoration: none;
    transition: all 0.2s;
}

.lang-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.lang-btn.active {
    color: #6a5cff;
    background: rgba(106, 92, 255, 0.12);
}

/* 按钮 */
.btn {
    padding: 10px 18px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.primary {
    background: linear-gradient(45deg, #6a5cff, #00d4ff);
    color: white;
}

.secondary {
    background: #222;
    color: #aaa;
}

.ghost {
    background: transparent;
    border: 1px solid #444;
    color: #ccc;
}

/* ============ Hero ============ */
.hero {
    height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 星空画布 */
#starfield {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

/* 标题 */
.hero h1 {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    margin: 0;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, #a78bfa 0%, #6a5cff 30%, #00d4ff 70%, #67e8f9 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 24px rgba(106, 92, 255, 0.5));
}

.hero p {
    font-size: clamp(16px, 2.5vw, 22px);
    color: rgba(255, 255, 255, 0.6);
    margin-top: 16px;
    font-weight: 300;
    letter-spacing: 0.05em;
}

/* 特性标签 */
.feature-tags {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 32px;
    flex-wrap: wrap;
}

.tag {
    padding: 8px 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    animation: float 4s ease-in-out infinite;
}

.tag:nth-child(2) { animation-delay: 0.5s; }
.tag:nth-child(3) { animation-delay: 1s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.download-buttons {
    margin-top: 36px;
    display: flex;
    gap: 16px;
    justify-content: center;
}

.download-buttons .btn {
    padding: 14px 28px;
    font-size: 15px;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-indicator span {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
    letter-spacing: 0.1em;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid rgba(255, 255, 255, 0.3);
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    transform: rotate(45deg);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.3; }
    50% { transform: rotate(45deg) translateY(6px); opacity: 0.8; }
}

/* ============ 卡片 ============ */
.characters {
    padding: 60px;
}

.card-grid {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.card {
    width: 300px;
    border-radius: 12px;
    overflow: hidden;
    background: #111;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-10px);
}

.card img {
    width: 100%;
}

.card-info {
    padding: 15px;
}

/* ============ 会员 ============ */
.pricing {
    padding: 60px;
    text-align: center;
}

.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.plan {
    padding: 30px;
    background: #111;
    border-radius: 12px;
    min-width: 180px;
    flex: 1;
    max-width: 240px;
}

.plan h3 {
    margin: 0 0 8px;
    font-size: 22px;
}

.plan p {
    color: #999;
    margin: 0 0 16px;
    font-size: 14px;
}

.plan span {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}

.highlight {
    border: 2px solid #6a5cff;
    position: relative;
}

.highlight::before {
    content: attr(data-badge);
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(45deg, #6a5cff, #00d4ff);
    color: #fff;
    font-size: 12px;
    padding: 3px 16px;
    border-radius: 10px;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    /* 导航 */
    .navbar {
        padding: 12px 16px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .logo {
        font-size: 16px;
    }

    .navbar nav {
        display: none;
    }

    .nav-right {
        gap: 8px;
    }

    .lang-btn {
        padding: 3px 6px;
        font-size: 11px;
    }

    .auth {
        display: flex;
        gap: 6px;
    }

    .auth .btn {
        padding: 6px 14px;
        font-size: 12px;
    }

    /* 会员 */
    .pricing {
        padding: 40px 20px;
    }

    .pricing-grid {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .plan {
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
    }

    .plan span {
        font-size: 24px;
    }

    /* 卡片 */
    .characters {
        padding: 40px 20px;
    }

    .card {
        width: 100%;
        max-width: 340px;
    }

    /* 下载按钮 */
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-buttons .btn.primary {
        display: none;
    }
}

/* ============ Footer ============ */
footer {
    text-align: center;
    padding: 20px;
    color: #666;
}