/*! nju.atlas - home.css (首页专用) */

/* ========== 首页容器 ========== */
#homePage,
#homePage.active-page {
    position: relative;
    width: 100%;
    max-width: none;
    min-height: calc(100vh - var(--atlas-topbar));
    padding-bottom: var(--atlas-bottombar);
    background: linear-gradient(180deg, #fefdfe 0%, #f8f6fa 30%, #f3eff8 100%) !important;
}
:root[data-theme="dark"] #homePage,
:root[data-theme="dark"] #homePage.active-page {
    background: linear-gradient(180deg, #14101e 0%, #1a1528 40%, #0f0f18 100%) !important;
}
#homePage::before {
    content: "";
    display: block;
    position: absolute;
    top: -180px;
    left: 50%;
    transform: translateX(-50%);
    width: min(900px, 100%);
    height: 500px;
    background: radial-gradient(ellipse at 50% 40%, rgba(168,85,247,0.08) 0%, rgba(168,85,247,0.03) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
:root[data-theme="dark"] #homePage::before {
    background: radial-gradient(ellipse at 50% 40%, rgba(168,85,247,0.12) 0%, rgba(107,33,165,0.05) 40%, transparent 70%);
}

/* ========== 粒子画布 ========== */
.home-particles {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========== 移动端图片网格（仅在移动端显示） ========== */
.home-mobile-grid {
    display: none;
}
@media (max-width: 768px) {
    .home-mobile-grid {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        grid-template-rows: repeat(7, 1fr);
        height: 50vh;
        min-height: 280px;
        -webkit-mask-image: linear-gradient(to bottom, black 30%, transparent 100%);
        mask-image: linear-gradient(to bottom, black 30%, transparent 100%);
    }
    .home-mobile-grid .mg-cell {
        background-size: cover;
        background-position: center;
    }
}

/* ========== Hero 区域（双栏布局） ========== */
.home-hero {
    display: flex;
    width: 100%;
    height: calc(100vh - var(--atlas-topbar) - 110px);
    min-height: 580px;
    padding: 0 0 0 40px;
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
    z-index: 2;
}

/* 左侧品牌区 */
.home-brand {
    flex: 0 0 auto;
    min-width: 340px;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 8vh 24px 0;
}
.home-brand-inner {
    position: relative;
    z-index: 1;
    text-align: left;
    padding: 30px 10px;
    max-width: clamp(460px, 70vw, 1300px);
}
.home-brand-kicker {
    margin: 0 0 8px;
    font-size: 0.7rem;
    font-weight: 750;
    letter-spacing: 0.17em;
    color: var(--text-tertiary);
}
.home-brand-title {
    margin: 0 0 14px;
    line-height: 1;
}
/* 首页品牌艺术字：与顶栏一致的遮罩上色。
   注意：宽度必须基于视口（vw），不能用 100%，因为父级 .home-brand-inner
   是收缩到内容宽度的弹性项，100% 会塌缩到文字宽度导致艺术字无法放大。 */
.home-brand-logo {
    display: block;
    width: min(100%, 1280px);
    aspect-ratio: 513 / 122;
    height: auto;
    background-color: var(--primary);
    -webkit-mask: url('../image/brand-logo.png') no-repeat left center / contain;
    mask: url('../image/brand-logo.png') no-repeat left center / contain;
    transition: background-color 0.3s ease;
}
@media (min-width: 769px) {
    .home-brand-logo {
        width: min(42vw, 760px);
    }
}

.home-brand-sub {
    margin: 0 0 26px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.home-brand-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.home-brand-btn {
    padding: 10px 22px;
    border-radius: var(--btn-radius);
    font-size: 0.84rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: none;
}
/* 两个按钮平时均为透明描边，仅在点击（按下）时实化填充 */
.home-brand-btn.primary,
.home-brand-btn.secondary {
    background: transparent;
    color: var(--atlas-ink);
    border: 1.5px solid var(--btn-border);
}
.home-brand-btn.primary:hover,
.home-brand-btn.secondary:hover {
    border-color: var(--btn-primary-bg);
    color: var(--btn-primary-bg);
    background: transparent;
}
.home-brand-btn.primary:active,
.home-brand-btn.secondary:active {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-fg);
    border-color: var(--btn-primary-bg);
    filter: none;
}

/* 右侧卡片区 */
.home-card-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 10px 14px 10px 0;
    box-sizing: border-box;
}
.home-card-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.home-card-row {
    display: flex;
    gap: 6px;
    justify-content: flex-end;
}

/* ========== 3D 翻转卡片 ========== */
.home-flip-card {
    width: 107px;
    height: 107px;
    flex: 0 0 107px;
    cursor: pointer;
    perspective: 600px;
    opacity: 0;
    transform: translateY(12px);
    will-change: opacity, transform;
}
.home-flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.4s ease;
    transform-style: preserve-3d;
}
.home-flip-card:hover .home-flip-inner,
.home-flip-card.flipped .home-flip-inner {
    transform: rotateY(180deg);
}
.home-flip-front,
.home-flip-back {
    position: absolute;
    inset: 0;
    border-radius: 6px;
    overflow: hidden;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}
.home-flip-front {
    background: var(--atlas-card);
    border: 1px solid var(--atlas-line);
}
.home-flip-back {
    transform: rotateY(180deg);
    background-size: cover;
    background-position: center;
}

/* 入场动画 */
.home-flip-card.enter {
    animation-name: homeCardUpFade;
    animation-duration: 260ms;
    animation-timing-function: cubic-bezier(.2, .9, .3, 1);
    animation-fill-mode: forwards;
}
@keyframes homeCardUpFade {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
    .home-flip-card,
    .home-flip-card.enter {
        animation: none !important;
        transition: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ========== 首次打开站点：分层左入淡入 ========== */
#homePage {
    --home-intro-slide: -52px;
    --home-intro-slide-first: -120px;
}

html.home-intro-pending #homePage .home-intro-layer,
#homePage.home-intro .home-intro-layer {
    opacity: 0;
    transform: translate3d(var(--home-intro-slide), 0, 0);
}

/* 第一层：更大位移 + 分段淡入，让浅入过程更明显 */
html.home-intro-pending #homePage .home-mobile-grid.home-intro-layer,
html.home-intro-pending #homePage .home-brand.home-intro-layer,
#homePage.home-intro .home-mobile-grid.home-intro-layer,
#homePage.home-intro .home-brand.home-intro-layer {
    transform: translate3d(var(--home-intro-slide-first), 0, 0);
}

#homePage.home-intro .home-intro-layer.is-in {
    will-change: transform, opacity;
    backface-visibility: hidden;
    animation: homeLayerSlideIn 0.65s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

html.home-intro-pending #homePage .home-mobile-grid.is-in,
#homePage.home-intro .home-mobile-grid.is-in,
html.home-intro-pending #homePage .home-brand.is-in,
#homePage.home-intro .home-brand.is-in {
    animation:
        homeLayerFirstMove 0.78s cubic-bezier(0.22, 1, 0.36, 1) forwards,
        homeLayerFirstFade 0.95s cubic-bezier(0.33, 0, 0.2, 1) forwards;
}

/* 动画结束后锁定最终态，避免移除 intro 类时回弹闪烁 */
#homePage.home-intro .home-intro-layer.is-in.home-intro-layer--done {
    opacity: 1;
    transform: none;
    animation: none;
    will-change: auto;
}

@keyframes homeLayerSlideIn {
    from { opacity: 0; transform: translate3d(var(--home-intro-slide), 0, 0); }
    to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

/* 位移与透明度分离：曲线插值更顺滑，淡入略慢于滑动 */
@keyframes homeLayerFirstMove {
    from { transform: translate3d(var(--home-intro-slide-first), 0, 0); }
    to   { transform: translate3d(0, 0, 0); }
}
@keyframes homeLayerFirstFade {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* 移动端：图片网格 → Hero → 功能卡片 */
@media (max-width: 768px) {
    html.home-intro-pending #homePage .home-brand.home-intro-layer,
    html.home-intro-pending #homePage .home-card-area.home-intro-layer,
    #homePage.home-intro .home-brand.home-intro-layer,
    #homePage.home-intro .home-card-area.home-intro-layer {
        opacity: 1;
        transform: none;
        animation: none !important;
    }
    html.home-intro-pending #homePage .home-mobile-grid.is-in,
    #homePage.home-intro .home-mobile-grid.is-in { animation-delay: 0ms; }
    html.home-intro-pending #homePage .home-hero.is-in,
    #homePage.home-intro .home-hero.is-in { animation-delay: 120ms; }
    html.home-intro-pending #homePage .home-features.is-in,
    #homePage.home-intro .home-features.is-in { animation-delay: 240ms; }
}

/* 桌面端：品牌区 → 卡片墙 → 功能卡片 */
@media (min-width: 769px) {
    html.home-intro-pending #homePage .home-mobile-grid.home-intro-layer,
    html.home-intro-pending #homePage .home-hero.home-intro-layer,
    #homePage.home-intro .home-mobile-grid.home-intro-layer,
    #homePage.home-intro .home-hero.home-intro-layer {
        opacity: 1;
        transform: none;
        animation: none !important;
    }
    html.home-intro-pending #homePage .home-brand.is-in,
    #homePage.home-intro .home-brand.is-in { animation-delay: 0ms; }
    html.home-intro-pending #homePage .home-card-area.is-in,
    #homePage.home-intro .home-card-area.is-in { animation-delay: 120ms; }
    html.home-intro-pending #homePage .home-features.is-in,
    #homePage.home-intro .home-features.is-in { animation-delay: 240ms; }
}

@media (prefers-reduced-motion: reduce) {
    html.home-intro-pending #homePage .home-intro-layer,
    #homePage.home-intro .home-intro-layer,
    #homePage.home-intro .home-intro-layer.is-in {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ========== 底部功能卡片（四列） ========== */
.home-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px 16px;
    box-sizing: border-box;
    position: relative;
    z-index: 2;
}
.home-feat-card {
    padding: 12px 16px;
    border-radius: 12px;
    background: var(--atlas-card);
    border: 1px solid var(--atlas-line);
    cursor: pointer;
    transition: all 0.25s ease;
}
.home-feat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--atlas-shadow-strong);
}
.home-feat-num {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--atlas-purple);
    background: rgba(124,58,237,0.08);
    padding: 2px 8px;
    border-radius: 999px;
    margin-bottom: 6px;
}
.home-feat-card h3 {
    margin: 0 0 4px;
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--atlas-ink);
}
.home-feat-card p {
    margin: 0;
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

/* ========== 暗色模式调整 ========== */
:root[data-theme="dark"] .home-brand-kicker {
    color: rgba(255,255,255,0.5);
}
:root[data-theme="dark"] .home-brand-logo {
    filter: drop-shadow(0 8px 28px rgba(0, 0, 0, 0.35));
}
:root[data-theme="dark"] .home-brand-sub {
    color: rgba(255,255,255,0.6);
}
:root[data-theme="dark"] .home-brand-btn.primary,
:root[data-theme="dark"] .home-brand-btn.secondary {
    background: transparent;
    color: rgba(255,255,255,0.8);
    border-color: rgba(255,255,255,0.25);
}
:root[data-theme="dark"] .home-brand-btn.primary:hover,
:root[data-theme="dark"] .home-brand-btn.secondary:hover {
    border-color: var(--btn-primary-bg);
    color: var(--btn-primary-bg);
    background: transparent;
}
:root[data-theme="dark"] .home-brand-btn.primary:active,
:root[data-theme="dark"] .home-brand-btn.secondary:active {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-fg);
    border-color: var(--btn-primary-bg);
}
:root[data-theme="dark"] .home-flip-front {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.07);
}
:root[data-theme="dark"] .home-feat-card {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.07);
}
:root[data-theme="dark"] .home-feat-card h3 {
    color: #e8e4f0;
}
:root[data-theme="dark"] .home-feat-card p {
    color: rgba(255,255,255,0.5);
}
:root[data-theme="dark"] .home-feat-num {
    color: #a78bfa;
    background: rgba(167,139,250,0.12);
}

/* ========== 移动端首页适配 ========== */
@media (max-width: 768px) {
    .home-particles { display: none; }
    .home-hero {
        flex-direction: column;
        height: auto;
        min-height: auto;
        max-height: none;
        padding: 0;
        gap: 0;
        overflow: visible;
    }
    .home-brand {
        flex: none;
        width: 100%;
        text-align: center;
        margin-top: -18vh;
        position: relative;
        z-index: 3;
    }
    .home-brand-inner {
        text-align: center;
        padding: 10px 0;
        max-width: none;
    }
    .home-brand-title { font-size: 2.6rem; }
    .home-brand-actions { justify-content: center; }
    .home-card-area { display: none !important; }
    .home-features {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        padding: 20px 16px 24px;
        position: relative;
        z-index: 3;
    }
    .home-feat-card { padding: 14px 15px; }
    .home-feat-card h3 { font-size: 0.84rem; }
    .home-feat-card p { font-size: 0.7rem; }
}