/* ============================================================
   CSS Variables — 玻璃态设计系统
   ============================================================ */
:root {
    --color-primary: #4F8CFF;
    --color-primary-dark: #3A7BD5;
    --color-secondary: #7B61FF;
    --color-accent: #00D4FF;
    --color-bg-1: #0B1020;
    --color-bg-2: #121826;
    --color-bg-3: #1E293B;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.45);
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-bg-hover: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.10);
    --glass-border-hover: rgba(79, 140, 255, 0.25);
    --glass-shadow: 0 16px 60px rgba(0, 0, 0, 0.5);
    --glass-shadow-hover: 0 24px 80px rgba(0, 0, 0, 0.6);
    --glass-blur: blur(30px);
    --glass-blur-light: blur(16px);
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --radius-card: 22px;
    --radius-btn: 60px;
    --radius-sm: 12px;
    --transition-smooth: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (prefers-color-scheme: light) {
    :root {
        --color-bg-1: #EBF0F8;
        --color-bg-2: #DDE5F0;
        --color-bg-3: #C8D2E0;
        --color-text-primary: #0B1020;
        --color-text-secondary: rgba(0, 0, 0, 0.65);
        --color-text-muted: rgba(0, 0, 0, 0.45);
        --glass-bg: rgba(255, 255, 255, 0.45);
        --glass-bg-hover: rgba(255, 255, 255, 0.65);
        --glass-border: rgba(255, 255, 255, 0.60);
        --glass-border-hover: rgba(79, 140, 255, 0.30);
        --glass-shadow: 0 16px 60px rgba(0, 0, 0, 0.08);
        --glass-shadow-hover: 0 24px 80px rgba(0, 0, 0, 0.12);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-size: 16px;
}
body {
    font-family: 'Inter', -apple-system, 'SF Pro Display', 'PingFang SC', sans-serif;
    background: var(--color-bg-1);
    color: var(--color-text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background var(--transition-smooth), color var(--transition-smooth);
}

/* ===== 工具类 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-card);
    transition: all var(--transition-smooth);
}
.glass:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: var(--glass-shadow-hover);
}
.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-tag {
    display: inline-block;
    padding: 0.2rem 1.2rem;
    border-radius: 60px;
    background: rgba(79, 140, 255, 0.15);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}
.section-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 0.8rem;
}
.section-desc {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
}
.text-balance {
    text-wrap: balance;
}
.section-padding {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
}
@media (max-width: 768px) {
    .section-padding {
        padding-top: var(--space-lg);
        padding-bottom: var(--space-lg);
    }
}
.highlight {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1.05em;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 2.2rem;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-smooth);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    box-shadow: 0 4px 24px rgba(79, 140, 255, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 40px rgba(79, 140, 255, 0.5);
}
.btn-primary:active {
    transform: scale(0.97);
}
.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: var(--glass-blur-light);
    border: 1px solid var(--glass-border);
    color: var(--color-text-secondary);
}
.btn-ghost:hover {
    background: rgba(79, 140, 255, 0.15);
    color: var(--color-primary);
    transform: translateX(4px);
}
.btn-sm {
    padding: 0.5rem 1.6rem;
    font-size: 0.9rem;
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-secondary);
    border: 1px solid var(--glass-border);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

/* ===== 导航栏 ===== */
.navbar-glass {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.6rem 0;
    background: rgba(11, 16, 32, 0.5);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-smooth);
}
@media (prefers-color-scheme: light) {
    .navbar-glass {
        background: rgba(235, 240, 248, 0.6);
        border-bottom-color: rgba(0, 0, 0, 0.04);
    }
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    text-decoration: none;
    z-index: 1001;
}
.navbar-brand .brand-icon {
    font-size: 2rem;
    color: var(--color-primary);
}
.nav-collapse {
    display: flex;
    align-items: center;
}
.navbar-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}
.nav-item {
    list-style: none;
}
.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-smooth);
}
.nav-link:hover {
    color: var(--color-primary);
    background: rgba(79, 140, 255, 0.12);
}
.btn-download-nav {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff !important;
    padding: 0.4rem 1.6rem;
    border-radius: var(--radius-btn);
    font-weight: 600;
}
.btn-download-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(79, 140, 255, 0.3);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)) !important;
}
.navbar-toggler {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.3rem;
    z-index: 1001;
    background: transparent;
}
.navbar-toggler span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}
.navbar-toggler[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
.navbar-toggler[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.navbar-toggler[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ===== 移动端菜单 ===== */
@media (max-width: 768px) {
    .navbar-toggler {
        display: flex;
    }
    .nav-collapse {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(11, 16, 32, 0.85);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        border-radius: 0 0 var(--radius-card) var(--radius-card);
        border: 1px solid var(--glass-border);
        border-top: none;
        padding: 1rem 1.5rem;
        margin-top: 0.5rem;
        box-shadow: var(--glass-shadow);
        z-index: 999;
    }
    @media (prefers-color-scheme: light) {
        .nav-collapse {
            background: rgba(235, 240, 248, 0.9);
        }
    }
    .nav-collapse.open {
        display: block;
    }
    .navbar-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 0.3rem;
        width: 100%;
    }
    .nav-link {
        padding: 0.8rem 1rem;
        text-align: center;
        font-size: 1.05rem;
        border-radius: var(--radius-sm);
    }
    .btn-download-nav {
        text-align: center;
        margin-top: 0.3rem;
        background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
        color: #fff !important;
    }
}

/* ===== Hero ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
    overflow: hidden;
}
.aurora-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: floatOrb 14s infinite alternate ease-in-out;
}
.orb-1 {
    width: 40vw;
    height: 40vw;
    background: var(--color-primary);
    top: -15%;
    left: -10%;
    opacity: 0.12;
}
.orb-2 {
    width: 30vw;
    height: 30vw;
    background: var(--color-secondary);
    bottom: -10%;
    right: -5%;
    opacity: 0.15;
    animation-delay: -5s;
}
.orb-3 {
    width: 20vw;
    height: 20vw;
    background: var(--color-accent);
    top: 40%;
    left: 40%;
    opacity: 0.08;
    animation-delay: -9s;
}
@keyframes floatOrb {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(40px, -40px) scale(1.15);
    }
}
.hero-container {
    position: relative;
    z-index: 1;
    width: 100%;
}
.hero-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.hero-title {
    font-size: clamp(2.6rem, 6vw, 4.2rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.05;
    margin-bottom: 1rem;
}
.hero-desc {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 90%;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
}
.hero-tags .tag {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 1rem 0.25rem 0.7rem;
    border-radius: var(--radius-btn);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur-light);
    border: 1px solid var(--glass-border);
}
.hero-tags .tag .material-symbols-outlined {
    font-size: 1.1rem;
    color: var(--color-primary);
}
.hero-preview-card {
    padding: 1.5rem;
    max-width: 400px;
    margin: 0 auto;
}
.preview-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}
.preview-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-text-muted);
}
.preview-header .dot:nth-child(1) {
    background: #ea4335;
}
.preview-header .dot:nth-child(2) {
    background: #fbbc04;
}
.preview-header .dot:nth-child(3) {
    background: #34a853;
}
.preview-title {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--color-text-muted);
}
.preview-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--glass-border);
}
.preview-item:last-child {
    border-bottom: none;
}
.preview-item .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--glass-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--color-primary);
    flex-shrink: 0;
}
.preview-item .content {
    flex: 1;
    min-width: 0;
}
.preview-item .content .name {
    font-weight: 600;
    font-size: 0.85rem;
}
.preview-item .content .msg {
    font-size: 0.78rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.preview-item .time {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

/* ===== 功能卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.feature-card {
    padding: 2rem;
    transition: all var(--transition-smooth);
}
.feature-card:hover {
    transform: translateY(-6px);
}
.feature-card .icon-box {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: rgba(79, 140, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}
.feature-card .icon-box .material-symbols-outlined {
    font-size: 2rem;
    color: var(--color-primary);
}
.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}
.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}
.feature-card .card-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.15rem 0.9rem 0.15rem 0.6rem;
    border-radius: var(--radius-btn);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(79, 140, 255, 0.12);
    margin-top: 1rem;
}
.feature-card .card-tag .material-symbols-outlined {
    font-size: 1rem;
}

/* ===== 场景卡片 ===== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.scenario-card {
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all var(--transition-smooth);
}
.scenario-card:hover {
    transform: translateY(-4px);
}
.scenario-card .emoji-big {
    font-size: 2.8rem;
    display: block;
    margin-bottom: 0.8rem;
}
.scenario-card h4 {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.2rem;
}
.scenario-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===== 截图 ===== */
.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
}
.screenshot-item {
    padding: 1.5rem;
    aspect-ratio: 4/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-smooth);
    cursor: default;
}
.screenshot-item:hover {
    transform: scale(1.03);
}
.screenshot-item .placeholder-icon {
    font-size: 2.8rem;
    color: var(--color-primary);
    opacity: 0.5;
}

/* ===== 下载 ===== */
.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.download-card {
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all var(--transition-smooth);
}
.download-card:hover {
    transform: translateY(-4px);
}
.download-card .icon-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(79, 140, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}
.download-card .icon-circle .material-symbols-outlined {
    font-size: 2.8rem;
    color: var(--color-primary);
}
.download-card h4 {
    font-weight: 700;
    font-size: 1.2rem;
}
.download-card .store-text {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.faq-item {
    padding: 0 0.2rem;
    overflow: hidden;
    transition: all var(--transition-smooth);
    cursor: pointer;
}
.faq-item .faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    font-size: 1.05rem;
    user-select: none;
    transition: color var(--transition-smooth);
}
.faq-item .faq-question:hover {
    color: var(--color-primary);
}
.faq-item .faq-question .material-symbols-outlined {
    transition: transform var(--transition-bounce);
    color: var(--color-text-muted);
}
.faq-item.active .faq-question .material-symbols-outlined {
    transform: rotate(180deg);
}
.faq-item .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s ease;
    padding: 0 1.5rem;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 1.5rem 1.2rem;
}
.faq-item .faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ===== 用户评价 ===== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.testimonial-card {
    padding: 1.8rem;
    transition: all var(--transition-smooth);
}
.testimonial-card:hover {
    transform: translateY(-4px);
}
.testimonial-card .stars {
    color: #fbbc04;
    font-size: 1rem;
    letter-spacing: 0.1rem;
    margin-bottom: 0.5rem;
}
.testimonial-card blockquote {
    font-size: 0.95rem;
    line-height: 1.8;
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}
.testimonial-card .author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.testimonial-card .author .avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(79, 140, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--color-primary);
}
.testimonial-card .author .info .name {
    font-weight: 600;
    font-size: 0.9rem;
}
.testimonial-card .author .info .role {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ===== 版本 ===== */
.version-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2.5rem;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(52, 168, 83, 0.2);
    color: #34a853;
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.2rem 1rem 0.2rem 0.7rem;
    border-radius: var(--radius-btn);
}
.version-badge .material-symbols-outlined {
    font-size: 1rem;
}

/* ===== Footer ===== */
.footer-glass {
    padding: 2.5rem 0;
    margin-top: 3rem;
    border-top: 1px solid var(--glass-border);
    background: rgba(11, 16, 32, 0.3);
    backdrop-filter: blur(16px);
}
@media (prefers-color-scheme: light) {
    .footer-glass {
        background: rgba(235, 240, 248, 0.4);
    }
}
.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-smooth);
}
.footer-links a:hover {
    color: var(--color-primary);
}
.footer-lang {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ===== Modal ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
}
.modal-overlay.active {
    display: flex;
}
.modal-glass {
    max-width: 580px;
    width: 90%;
    padding: 0;
    overflow: hidden;
    animation: modalIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.8rem;
    border-bottom: 1px solid var(--glass-border);
}
.modal-header h5 {
    font-weight: 700;
    font-size: 1.2rem;
}
.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 0 0.3rem;
    transition: color var(--transition-smooth);
}
.modal-close:hover {
    color: #fff;
}
.modal-body {
    padding: 1.8rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 0.98rem;
}
.modal-body a {
    color: var(--color-primary);
    text-decoration: underline;
}
.modal-footer {
    padding: 1rem 1.8rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: flex-end;
}

/* ===== 非官网提示条（可关闭） ===== */
.disclaimer-bar {
    background: rgba(11, 16, 32, 0.65);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.6rem 0;
    position: relative;
    z-index: 999;
    font-size: 0.9rem;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.disclaimer-bar.hidden {
    display: none;
}

@media (prefers-color-scheme: light) {
    .disclaimer-bar {
        background: rgba(235, 240, 248, 0.75);
        border-bottom-color: rgba(0, 0, 0, 0.06);
    }
}

.disclaimer-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.disclaimer-icon {
    color: #fbbf24;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.disclaimer-text {
    color: var(--color-text-secondary);
    text-align: center;
    flex: 1;
}

.disclaimer-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-smooth);
    flex-shrink: 0;
    line-height: 1;
}

.disclaimer-close:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 480px) {
    .disclaimer-bar {
        font-size: 0.8rem;
        padding: 0.4rem 0;
    }
    .disclaimer-inner {
        gap: 0.4rem;
    }
    .disclaimer-icon {
        font-size: 1.2rem;
    }
    .disclaimer-close {
        font-size: 1rem;
    }
}

/* ===== AOS ===== */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
[data-aos].aos-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero-row {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-desc {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-tags {
        justify-content: center;
    }
    .hero-preview-card {
        max-width: 100%;
        margin-top: 1.5rem;
    }
    .features-grid,
    .scenarios-grid,
    .download-grid,
    .testimonials-grid {
        grid-template-columns: 1fr 1fr;
    }
    .screenshot-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .features-grid,
    .scenarios-grid,
    .download-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    .screenshot-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.8rem;
    }
    .version-wrapper {
        flex-direction: column;
        text-align: center;
        padding: 1.8rem;
    }
    .footer-container {
        flex-direction: column;
        text-align: center;
        gap: 0.8rem;
    }
    .footer-links {
        justify-content: center;
    }
    .hero-section {
        padding: 5rem 0 2rem;
    }
    .hero-title {
        font-size: 2.2rem;
    }
}
@media (max-width: 480px) {
    .screenshot-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.6rem;
    }
    .screenshot-item {
        padding: 1rem;
        font-size: 0.75rem;
    }
    .screenshot-item .placeholder-icon {
        font-size: 2rem;
    }
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    .hero-tags .tag {
        font-size: 0.7rem;
        padding: 0.15rem 0.7rem 0.15rem 0.5rem;
    }
    .modal-glass {
        width: 95%;
        margin: 0.5rem;
    }
    .modal-header {
        padding: 1rem 1.2rem;
    }
    .modal-body {
        padding: 1.2rem;
        font-size: 0.9rem;
    }
}

/* ===== 无障碍 & 打印 ===== */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}
@media print {
    .navbar-glass {
        position: static;
        background: #fff !important;
        backdrop-filter: none !important;
    }
    .glass {
        background: #fff !important;
        backdrop-filter: none !important;
        box-shadow: none !important;
        border-color: #ddd !important;
    }
    .aurora-bg {
        display: none !important;
    }
    .btn {
        background: #eee !important;
        color: #333 !important;
        box-shadow: none !important;
    }
    .modal-overlay {
        display: none !important;
    }
}