/* ========== 基础设置 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --bg: #fff;
    --surface: #fff;
    --surface-alt: #f7f9fc;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #0b6bff;
    --border: #e9eef6;
    --stage-hl: rgba(15, 23, 42, .04);
    --feat-bottom-crop: clamp(6px, .7vw, 10px);
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    background: linear-gradient(180deg, #f3f7ff 0%, #ffffff 60%);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

img {
    max-width: 100%;
    display: block;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px 0;
}

/* ========== 顶部导航 ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: saturate(120%) blur(8px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 16px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.brand-name {
    font-weight: 800;
    font-size: 18px;
    color: var(--primary);
}

.main-nav {
    display: flex;
    gap: 24px;
    justify-self: end;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.main-nav a {
    color: #1f2937;
    text-decoration: none;
    font-weight: 600;
    opacity: .92;
    transition: color .2s, opacity .2s;
}

.main-nav a:hover {
    color: var(--primary);
    opacity: 1;
}

.lang-switch {
    display: flex;
    gap: 6px;
}

.lang-switch button {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 8px;
    transition: background .2s;
}

.lang-switch button.active,
.lang-switch button:hover {
    background: #eaf2ff;
}

/* 小屏：导航换行并居中 */
@media (max-width:760px) {
    .header-inner {
        grid-template-columns: 1fr auto;
        row-gap: 8px;
    }

    .main-nav {
        grid-column: 1 / span 2;
        justify-self: center;
        flex-wrap: wrap;
        gap: 12px;
    }
}

/* ========== Hero ========== */
.hero-landing {
    padding: 46px 0 18px;
    text-align: center;
}

.hero-inner {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    font-size: .92rem;
    color: var(--primary);
    background: #f7f9fc;
    border: 1px solid #eef2f7;
    padding: 6px 10px;
    border-radius: 999px;
}

.hero-title {
    margin: 10px 0 8px;
    font-size: clamp(34px, 5.2vw, 56px);
    line-height: 1.15;
}

.hero-sub {
    font-size: 1.08rem;
    color: var(--muted);
    margin: 6px 0 18px;
}

.hero-visual {
    margin-top: clamp(20px, 4vh, 48px);
    width: clamp(720px, 86vw, 960px);
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    --glow-y-shift: -15%;
}

.hero-gallery {
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 24px 60px rgba(16, 24, 40, .12), 0 8px 24px rgba(16, 24, 40, .08);
    position: relative;
}

.hero-gallery .shot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(450px circle at var(--mx, 50%) calc(var(--my, 50%) + var(--glow-y-shift, -8%)), rgba(0, 122, 255, .14), transparent 55%);
    pointer-events: none;
    z-index: 0;
}

/* ========== 按钮组件 ========== */
.platforms {
    display: grid;
    gap: 12px;
    max-width: 680px;
    margin-bottom: clamp(16px, 3.5vh, 40px);
    grid-template-columns: repeat(3, minmax(160px, 1fr));
}

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    padding: 0 14px;
    border-radius: 12px;
    font-weight: 700;
    font-size: .95rem;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1;
    border: 0;
    outline: 0;
    width: 100%;
    transition: box-shadow .18s, background .18s, transform .18s, color .18s;
    -webkit-tap-highlight-color: transparent;
}

/* 平台图标：mask + currentColor */
.btn .icon {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    display: inline-block;
    background: currentColor;
    -webkit-mask: center/contain no-repeat;
    mask: center/contain no-repeat;
    flex: 0 0 18px;
}

.icon.os-win {
    -webkit-mask-image: url(assets/images/icons/windows.svg);
    mask-image: url(assets/images/icons/windows.svg);
}

.icon.os-linux {
    -webkit-mask-image: url(assets/images/icons/linux.svg);
    mask-image: url(assets/images/icons/linux.svg);
}

.icon.os-android {
    -webkit-mask-image: url(assets/images/icons/android.svg);
    mask-image: url(assets/images/icons/android.svg);
}

.icon.os-harmony {
    -webkit-mask-image: url(assets/images/icons/harmony.svg);
    mask-image: url(assets/images/icons/harmony.svg);
}

/* mac 与 iOS 共用 apple.svg */
.icon.os-mac,
.icon.os-ios {
    -webkit-mask-image: url(assets/images/icons/apple.svg);
    mask-image: url(assets/images/icons/apple.svg);
}

.btn-primary {
    background: linear-gradient(180deg, #0e6bff 0%, #0a59ff 100%);
    color: #fff;
    box-shadow: 0 6px 18px rgba(11, 107, 255, .18);
    padding: 0 18px;
}

.btn-ghost {
    background: #fff;
    color: #3b495c;
    border: 1px solid var(--border) !important;
    box-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 1px rgba(16, 24, 40, .04);
}

/* 悬停动效仅在有鼠标设备启用 */
@media (hover:hover) {
    .btn-primary:hover {
        transform: translateY(-1px);
        box-shadow: 0 10px 26px rgba(11, 107, 255, .22);
    }

    .btn-ghost:hover {
        background: #fafcff;
        border-color: #e6eef8 !important;
        color: var(--primary);
    }
}

/* 键盘可见焦点 */
.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(11, 107, 255, .28), 0 6px 18px rgba(11, 107, 255, .18);
    outline: none;
}

/* “即将推出”贴纸：右侧垂直居中，不遮挡文本 */
.btn-soon {
    cursor: not-allowed;
    padding-right: clamp(56px, 9vw, 92px);
}

.btn .soon-tag {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    line-height: 1;
    color: #5f6b7a;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    pointer-events: none;
}

.btn.reco {
    box-shadow: 0 0 0 3px rgba(11, 107, 255, .18), 0 10px 24px rgba(11, 107, 255, .18);
}

/* ========== 通用组件 ========== */
.section {
    margin: 64px 0;
}

.section-title {
    text-align: center;
    font-size: 28px;
    margin: 0 0 16px;
}

/* ========== 功能卡片 ========== */
.features .feature-split-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-top: 22px;
}

.feature-split {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    align-items: center;
    background: #fff;
    border-radius: 24px;
    overflow: hidden;
    padding: clamp(28px, 3.8vw, 44px);
    gap: clamp(24px, 3vw, 36px);
    box-shadow: 0 8px 24px rgba(16, 24, 40, .06);
}

.feature-split.reverse {
    grid-template-columns: 1fr 1.15fr;
}

.feature-split.reverse .feature-media {
    order: 1;
}

.feature-split.reverse .feature-content {
    order: 2;
}

.feature-content {
    order: 1;
    min-width: 0;
    padding-left: clamp(24px, 4vw, 48px);
    padding-right: clamp(12px, 2.4vw, 28px);
}

.feature-content h3 {
    font-size: 1.45rem;
    line-height: 1.25;
    margin: 4px 0 12px;
    color: #0b6bff;
}

.feature-content p {
    margin: 0 0 14px;
    line-height: 1.75;
    color: #3a4758;
}

.feature-bullets {
    margin-top: 12px;
    padding-left: 18px;
    color: #2f3a48;
    font-size: .82rem;
    line-height: 1.6;
}

.feature-bullets li {
    margin: 8px 0;
}

.feature-media {
    order: 2;
    position: relative;
    border-radius: 18px;
    overflow: visible;
}

/* ========== 视图切换 Tabs ========== */
.view-tabs {
    position: absolute;
    top: clamp(14px, 1.8vw, 22px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: inline-flex;
    gap: 6px;
    padding: 6px;
    border-radius: 12px;
    background: rgba(255, 255, 255, .82);
    backdrop-filter: saturate(120%) blur(6px);
    border: 1px solid var(--border);
    box-shadow: 0 4px 16px rgba(16, 24, 40, .08);
    max-width: 92%;
    justify-content: center;
    flex-wrap: wrap;
    row-gap: 6px;
}

.view-tabs .tab {
    appearance: none;
    border: 0;
    padding: 6px 10px;
    border-radius: 9px;
    font-size: 12px;
    line-height: 1;
    background: transparent;
    color: #334155;
    cursor: pointer;
    transition: all .2s;
}

.view-tabs .tab.active {
    background: #eaf2ff;
    color: var(--primary);
    font-weight: 700;
}

.view-tabs .tab:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* AI 场景 tabs 在图片外部上方排列（多语言安全） */
.feature-split.reverse .feature-media:has(.view-tabs [data-ai-scene]) {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-media .view-tabs:has([data-ai-scene]) {
    position: static;
    left: auto;
    transform: none;
    margin: 0 auto;
    max-width: 100%;
    justify-content: center;
    order: -1;
}

.feature-split.reverse .feature-media:has(.view-tabs [data-ai-scene]) .feature-view-stage {
    order: 1;
}

/* ========== 舞台容器 ========== */
.feature-view-stage {
    width: 100%;
    aspect-ratio: 11/10;
    border-radius: 14px 0 0 14px;
    overflow: hidden;
    background: linear-gradient(180deg, #ffffff, #fbfdff);
    box-shadow: inset 0 1px 0 var(--stage-hl), inset 1px 0 0 var(--stage-hl), inset 0 -1px 0 var(--stage-hl),
        0 14px 36px rgba(16, 24, 40, .10), 0 6px 16px rgba(16, 24, 40, .06);
    display: grid;
    place-items: center;
    padding-top: clamp(8px, 1vw, 14px);
    padding-left: clamp(10px, 1.2vw, 16px);
}

.features .feature-split.reverse .feature-media .feature-view-stage {
    border-radius: 0 14px 14px 0 !important;
    box-shadow: inset 0 1px 0 var(--stage-hl), inset -1px 0 0 var(--stage-hl), inset 0 -1px 0 var(--stage-hl),
        0 14px 36px rgba(16, 24, 40, .10), 0 6px 16px rgba(16, 24, 40, .06) !important;
    padding-right: clamp(10px, 1.2vw, 16px);
    padding-left: 0;
}

/* ========== 媒体图片样式 ========== */
.feature-shot--views {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    -webkit-clip-path: inset(0 0 var(--feat-bottom-crop) 0);
    clip-path: inset(0 0 var(--feat-bottom-crop) 0);
}

.features .feature-split .feature-media :is(img, video) {
    border-radius: 14px 0 0 14px !important;
    -webkit-clip-path: inset(0 0 var(--feat-bottom-crop) 0) !important;
    clip-path: inset(0 0 var(--feat-bottom-crop) 0) !important;
    box-shadow: 0 14px 36px rgba(16, 24, 40, .10), 0 6px 16px rgba(16, 24, 40, .06);
}

.features .feature-split.reverse .feature-media :is(img, video) {
    border-radius: 0 14px 14px 0 !important;
}

.features .feature-split .feature-media .feature-view-stage :is(img, video) {
    box-shadow: none !important;
}

/* 视频舞台（卡片3） */
.features .feature-view-stage:has(video),
.features .feature-split-list>article.feature-split:nth-of-type(3) .feature-view-stage {
    box-shadow: 0 14px 36px rgba(16, 24, 40, .10), 0 6px 16px rgba(16, 24, 40, .06) !important;
    aspect-ratio: 1280 / 1200 !important;
}

.features .feature-split .feature-media video {
    outline: 0 !important;
    border: 0 !important;
    box-shadow: none !important;
    pointer-events: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    -webkit-user-drag: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* 卡片1：AI 场景舞台更贴图比例，四角圆角 */
.features .feature-split-list>article.feature-split:nth-of-type(1) .feature-view-stage {
    aspect-ratio: 888 / 1110 !important;
    max-width: 400px;
    margin: 0 auto;
    border-radius: 14px !important;
    box-shadow: inset 0 1px 0 var(--stage-hl), inset 1px 0 0 var(--stage-hl), inset -1px 0 0 var(--stage-hl),
        inset 0 -1px 0 var(--stage-hl), 0 14px 36px rgba(16, 24, 40, .10), 0 6px 16px rgba(16, 24, 40, .06) !important;
}

.features .feature-split-list>article.feature-split:nth-of-type(1) .feature-media :is(img, video) {
    border-radius: 14px !important;
}

/* ========== 更多功能卡片 ========== */
.more-features .mini-feature-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 18px;
}

.mini-card {
    background: linear-gradient(180deg, #ffffff, #fbfdff);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    min-height: 148px;
    box-shadow: 0 8px 24px rgba(16, 24, 40, .06);
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: transform .2s ease, box-shadow .2s ease;
}

.mini-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(16, 24, 40, .12);
}

.mini-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef5ff;
    color: #0b6bff;
    font-size: 20px;
}

.mini-card h3 {
    font-size: 1.06rem;
    margin: 4px 0;
}

.mini-card p {
    margin: 0;
    color: #516070;
}

/* ========== 用户评价 ========== */
.reviews {
    margin: 72px 0 120px;
}

.review-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.review-card {
    background: linear-gradient(180deg, #ffffff, #fbfdff);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(16, 24, 40, .06);
    padding: 16px;
    height: 180px;
    display: grid;
    grid-template-columns: 44px 1fr;
    grid-template-rows: auto 1fr;
    column-gap: 12px;
    row-gap: 10px;
    align-items: center;
    transition: transform .15s ease, box-shadow .15s ease;
}

.review-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(16, 24, 40, .08);
}

.review-avatar {
    grid-column: 1;
    grid-row: 1;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 2px 6px rgba(0, 0, 0, .06);
}

.review-head {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.review-name {
    font-weight: 800;
    color: #111827;
    font-size: 1.02rem;
}

.review-job {
    font-size: .92rem;
    color: #7a8799;
}

.review-text {
    grid-column: 1 / span 2;
    grid-row: 2;
    margin: 0;
    color: #334155;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
}

/* ========== 页脚 ========== */
footer {
    border-top: 1px solid var(--border);
    background: transparent;
    margin-top: 40px;
}

.footer-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 22px 20px;
    display: grid;
    grid-template-columns: 1.2fr .8fr .8fr;
    gap: 16px;
    align-items: flex-start;
}

.footer-about .logo {
    font-weight: 800;
    font-size: 20px;
    color: #0b6bff;
}

.foot-desc {
    color: #516070;
    margin: 8px 0;
}

.foot-mail {
    color: #0b6bff;
    text-decoration: none;
    font-weight: 700;
}

.foot-links {
    display: flex;
    gap: 18px;
    align-items: center;
}

.foot-links a {
    color: #0b6bff;
    text-decoration: none;
    font-weight: 600;
    transition: text-decoration .2s;
}

.foot-links a:hover {
    text-decoration: underline;
}

.foot-meta {
    display: flex;
    gap: 16px;
    color: #6b7280;
    align-items: center;
}

/* ========== 可访问性与动效偏好 ========== */
@media (prefers-reduced-motion:reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* ========== 响应式 ========== */
@media (min-width:1200px) {

    .feature-split,
    .feature-split.reverse {
        grid-template-columns: 560px 560px !important;
        justify-content: center;
    }
}

@media (min-width:900px) {
    .hero-gallery {
        aspect-ratio: 4/3;
        min-height: 460px;
    }
}

@media (min-width:1400px) {
    .hero-gallery {
        min-height: 500px;
    }
}

@media (max-width:1100px) {
    .main-nav {
        gap: 16px;
    }
}

@media (max-width:900px) {
    .platforms {
        grid-template-columns: repeat(2, minmax(160px, 1fr));
    }

    .more-features .mini-feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-wrap {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .review-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .feature-split {
        grid-template-columns: 1fr !important;
    }

    .feature-content {
        padding-left: 16px;
        padding-right: 16px;
    }

    /* 卡片1 舞台在窄屏放宽 */
    .features .feature-split-list>article.feature-split:nth-of-type(1) .feature-view-stage {
        max-width: 100%;
        aspect-ratio: 888 / 1110 !important;
    }
}

@media (max-width:520px) {
    .hero-visual {
        --glow-y-shift: -5%;
    }

    .hero-gallery {
        aspect-ratio: 4/3;
        min-height: 280px;
    }

    .platforms {
        grid-template-columns: repeat(2, minmax(130px, 1fr));
    }

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

    .feature-view-stage {
        padding-top: 6px;
        padding-left: 8px;
    }

    /* 视图切换 tabs 默认位置收紧 */
    .features .feature-split .feature-media .view-tabs {
        top: 12px !important;
    }

    /* AI 场景 tabs 依旧外部静态布局 */
    .feature-media .view-tabs:has([data-ai-scene]) {
        position: static !important;
        top: auto !important;
        margin: 0 auto 12px;
    }

    .features .feature-split-list>article.feature-split:nth-of-type(1) .feature-view-stage {
        max-width: 100%;
        padding-right: 8px;
    }
}

/* 极小屏贴纸安全边距 */
@media (max-width:360px) {
    .btn-soon {
        padding-right: 64px;
    }

    .btn .soon-tag {
        right: 8px;
        font-size: 11px;
        padding: 3px 8px;
    }
}

/* ========== 深色模式（可选） ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1220;
        --surface: #0f172a;
        --surface-alt: #111827;
        --text: #e5e7eb;
        --muted: #9aa4b2;
        --border: #1f2937;
        --stage-hl: rgba(255, 255, 255, .06);
    }

    body {
        background: linear-gradient(180deg, #0b1220 0%, #0f172a 60%);
    }

    .site-header {
        background: rgba(15, 23, 42, .8);
        border-bottom-color: var(--border);
    }

    .hero-badge {
        background: var(--surface);
        border-color: var(--border);
    }

    .btn-ghost {
        background: var(--surface);
        color: #e5e7eb;
        border-color: var(--border) !important;
    }

    .feature-split,
    .mini-card,
    .review-card {
        background: linear-gradient(180deg, var(--surface), #0b1220);
        border-color: var(--border);
    }
}