:root {
    --bg-color: #fbfbfd;
    --text-main: #1d1d1f;
    --text-muted: #86868b;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.02);
    --primary-gradient: linear-gradient(135deg, #2f80ed, #00c6ff);
    --accent-gradient: linear-gradient(135deg, #3b82f6, #8b5cf6, #ec4899);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro", "SF Pro Display", "SF Pro Text", "HarmonyOS Sans SC", "HarmonyOS Sans", "DingTalk JinBuTi", "OPPO Sans", "MiSans", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-weight: 200;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background animated glows - Premium Light Theme with Soft Colors */
.background-effects {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100%;
    min-height: 100vh;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.glow {
    position: absolute;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.35;
    animation: float 25s infinite alternate ease-in-out;
}

.glow-1 {
    top: -10%;
    left: -15%;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.025), transparent 70%);
    animation-delay: 0s;
}

.glow-2 {
    bottom: 20%;
    right: -15%;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.025), transparent 70%);
    animation-delay: -5s;
}

.glow-3 {
    top: 40%;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(0, 0, 0, 0.02), transparent 70%);
    animation-delay: -10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(4%, 8%) scale(1.08);
    }

    66% {
        transform: translate(-4%, 4%) scale(0.92);
    }

    100% {
        transform: translate(0, -8%) scale(1.04);
    }
}

/* Floating Glass Navbar */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 72px;
    background: rgba(251, 251, 253, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
    display: flex;
    align-items: center;
}

.nav-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo-accent {
    color: var(--text-muted);
    font-weight: 100;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.lang-switcher {
    position: relative;
}

.lang-trigger {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
    padding: 0.45rem 1rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 300;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-family: inherit;
}

.lang-trigger:hover,
.lang-trigger.active {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.05);
}

.dropdown-chevron {
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0.7;
}

.lang-trigger.active .dropdown-chevron {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 0.4rem;
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.02),
        0 1px 3px rgba(0, 0, 0, 0.01);
    display: none;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 88px;
    z-index: 100;
    transform: translateY(10px);
    opacity: 0;
    animation: dropdownFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.lang-dropdown.show {
    display: flex;
}

@keyframes dropdownFadeIn {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.lang-dropdown-item {
    background: none;
    border: none;
    font-size: 0.8rem;
    font-weight: 300;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.4rem 0.5rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.2s ease;
    font-family: inherit;
    white-space: nowrap;
}

.lang-dropdown-item:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-main);
}

.lang-dropdown-item.active {
    background: rgba(0, 0, 0, 0.02);
    color: var(--text-main);
    font-weight: 400;
}

.contact-btn {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1.1rem;
    border-radius: 9999px;
    background: var(--glass-bg);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    font-weight: 500;
}

.contact-btn:hover {
    color: var(--text-main);
    border-color: var(--text-main);
    background: rgba(0, 0, 0, 0.04);
    transform: translateY(-1px);
}

/* Main Container */
.container {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 900px;
    padding: 100px 2rem 4rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Glassmorphism Card Base */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    box-shadow:
        0 6px 20px rgba(0, 0, 0, 0.015),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transform: translateY(20px);
    opacity: 0;
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.studio-card {
    animation-delay: 0.1s;
}

.app-card {
    animation-delay: 0.3s;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-tag {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.02);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Studio Intro Card */
.studio-card {
    padding: 4.5rem 4rem;
    text-align: left;
}

.studio-card .title {
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: -0.5px;
    margin-bottom: 1.5rem;
    line-height: 1.4;
    color: var(--text-main);
}

.studio-card .title span {
    color: var(--text-main);
    font-weight: 500;
}

.studio-card .subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    font-weight: 200;
    line-height: 1.7;
    margin: 0;
}

.studio-meta {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.meta-value {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-main);
    letter-spacing: -0.2px;
}

.meta-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 300;
}

.meta-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

/* App Showcase Card */
.app-card {
    padding: 4.5rem 4rem;
}

.app-card-header {
    display: flex;
    align-items: center;
    gap: 2.2rem;
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
}

.app-icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    box-shadow:
        0 6px 15px rgba(0, 0, 0, 0.03),
        0 1px 3px rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.02);
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    flex-shrink: 0;
}

.app-card:hover .app-icon {
    transform: scale(1.04) rotate(2deg);
}

.app-brand-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.app-tag {
    background: #000000;
    color: #ffffff;
    font-weight: 400;
    letter-spacing: 0.5px;
    padding: 0.2rem 0.7rem;
    margin-bottom: 0.3rem;
}

.app-title {
    font-size: 1.45rem;
    font-weight: 300;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

.app-category {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 200;
}

.rating-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.2rem;
}

.stars {
    color: var(--text-main);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.rating-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 300;
}

.app-body {
    display: flex;
    flex-direction: column;
}

.app-desc {
    font-size: 1.05rem;
    line-height: 1.75;
    color: #3a3a3c;
    margin-bottom: 2.5rem;
}

/* Feature List */
.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
}

.feature-icon {
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.04);
    padding: 0.3rem;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.15rem;
}

.feature-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #48484a;
}

.feature-text strong {
    color: var(--text-main);
    font-weight: 400;
}

/* Call to Action Button */
.cta-container {
    display: flex;
    justify-content: flex-start;
}

.btn {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    color: #ffffff;
    background: #000000;
    padding: 0.75rem 1.8rem;
    border-radius: 9999px;
    font-weight: 400;
    font-size: 0.9rem;
    letter-spacing: 0.2px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.btn:hover {
    transform: translateY(-1.5px);
    background: #1c1c1e;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
}

.apple-store-svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    margin-bottom: 1px;
}

/* Footer Section */
.footer {
    width: 100%;
    max-width: 900px;
    margin: 2rem auto 0 auto;
    padding: 3rem 2rem 4rem 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    z-index: 10;
}

.footer-copyright {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-main);
}

.footer-contact {
    font-size: 0.85rem;
    line-height: 1.5;
}

.footer-contact a {
    color: #2f80ed;
    text-decoration: none;
    font-weight: 400;
    transition: opacity 0.2s ease;
}

.footer-contact a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header {
        height: 64px;
    }

    .nav-container {
        padding: 0 1.25rem;
    }

    .nav-right {
        gap: 0.75rem;
    }

    .lang-trigger {
        font-size: 0.75rem;
        padding: 0.35rem 0.8rem;
    }

    .container {
        padding: 84px 1.25rem 3rem 1.25rem;
        gap: 2rem;
    }

    .studio-card,
    .app-card {
        padding: 3rem 2rem;
        border-radius: 24px;
    }

    .studio-card .title {
        font-size: 1.45rem;
        letter-spacing: -0.3px;
    }

    .studio-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
        margin-top: 2.5rem;
        padding-top: 1.5rem;
    }

    .meta-divider {
        display: none;
    }

    .app-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
        padding-bottom: 1.5rem;
        margin-bottom: 2rem;
    }

    .app-title {
        font-size: 1.25rem;
    }

    .app-icon {
        width: 80px;
        height: 80px;
        border-radius: 18px;
    }

    .feature-list {
        margin-bottom: 2.5rem;
        gap: 1.2rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: 0.75rem 1.8rem;
        font-size: 0.9rem;
    }

    .footer {
        padding: 2rem 1.25rem 3rem 1.25rem;
    }
}