/* ----- Reset / Base ----- */
*, *::before, *::after {
    box-sizing: border-box
}

html:focus-within {
    scroll-behavior: smooth
}

body {
    margin: 0;
    line-height: 1.6;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, -apple-system, "Apple Color Emoji", "Segoe UI Emoji";
    -webkit-font-smoothing: antialiased
}

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

a {
    color: inherit;
    text-decoration: none
}

/* ----- Theme tokens ----- */
:root {
    --bg: #0b1020;
    --panel: #0f172a;
    --panel-2: #121a31;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --brand: #a3e635;
    --brand-2: #22d3ee;
    --ring: #a3e63544;
    --card: #0e1530;
    --shadow: 0 8px 24px rgba(2, 6, 23, .35);
    --border: #1f2a44;
    --code: #0a0f1e
}

.light {
    --bg: #ffffff;
    --panel: #f8fafc;
    --panel-2: #eef2f7;
    --text: #0f172a;
    --muted: #475569;
    --brand: #3b82f6;
    --brand-2: #22c55e;
    --ring: #3b82f655;
    --card: #ffffff;
    --shadow: 0 8px 24px rgba(15, 23, 42, .12);
    --border: #e5e7eb;
    --code: #0f172a
}

body {
    background: var(--bg);
    color: var(--text)
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px
}

/* ===== Glass–matte tokens ===== */
:root {
    --glass-bg: color-mix(in oklab, var(--panel) 55%, transparent);
    --glass-border: #ffffff22;
    --glass-highlight: #ffffff26;
    --glass-shadow: 0 8px 24px rgba(2, 6, 23, .25);
}

.light {
    --glass-border: #0f172a22;
    --glass-highlight: #ffffff3a;
}

/* ===== Avatars ===== */
.avatar img,
img.avatar {
    width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 4/3;
    border-bottom: 1px solid var(--border);
    display: block;
}

/* glass–matte avatar placeholder */
.avatar.placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    position: relative;
    background: linear-gradient(180deg, var(--glass-bg), color-mix(in oklab, var(--panel-2) 85%, transparent));
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow) inset 0 1px 0 var(--glass-highlight);
    backdrop-filter: blur(10px) saturate(120%);
    -webkit-backdrop-filter: blur(10px) saturate(120%);
}

.avatar.placeholder::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, .12), rgba(255, 255, 255, 0) 40%);
    pointer-events: none;
}

/* ===== Project cover (NEW, for project cards & gallery) ===== */
.project-cover {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-bottom: 1px solid var(--border);
    display: block;
}

.project-cover.placeholder {
    position: relative;
    background: linear-gradient(180deg, var(--glass-bg), color-mix(in oklab, var(--panel-2) 85%, transparent));
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow) inset 0 1px 0 var(--glass-highlight);
    backdrop-filter: blur(10px) saturate(120%);
    -webkit-backdrop-filter: blur(10px) saturate(120%);
}

/* ----- Header / Nav ----- */
header.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
    background: color-mix(in oklab, var(--panel) 90%, transparent);
    border-bottom: 1px solid var(--border)
}

.nav {
    display: flex;
    align-items: center;
    gap: 16px;
    justify-content: space-between;
    padding: 14px 0
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700
}

.brand svg {
    width: 28px;
    height: 28px
}

.nav-links-inline {
    display: flex;
    gap: 8px;
    flex-wrap: wrap
}

/* FIX: 给桌面端导航加类名 */
.nav-links-inline a {
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid transparent;
    color: var(--muted)
}

.nav-links-inline a.active, .nav-links-inline a:hover {
    color: var(--text);
    border-color: var(--border);
    background: var(--panel-2)
}

.controls {
    display: flex;
    gap: 8px;
    align-items: center;
    padding-right: max(10px, env(safe-area-inset-right));
}

/* FIX: 右侧安全留白 */
.btn, button, .chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 10px 14px;
    background: var(--panel);
    color: var(--text);
    cursor: pointer
}

.btn.primary {
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    color: #0b1020;
    border: 0
}

.btn.ghost {
    background: transparent
}

.btn:focus-visible {
    outline: 2px solid var(--ring);
    outline-offset: 2px
}

/* 移动端 menu 按钮更靠左一点，避免被滚动条挡住 */
#menu {
    display: none;
    margin-right: 12px;
}

/* FIX */
@media (max-width: 720px) {
    #menu {
        display: inline-flex;
    }
}

/* ----- Mobile drawer (NEW) ----- */
/*.nav-drawer {*/
/*    position: fixed;*/
/*    top: 0;*/
/*    right: 0;*/
/*    bottom: 0;*/
/*    width: min(86vw, 360px);*/
/*    background: var(--panel);*/
/*    border-left: 1px solid var(--border);*/
/*    transform: translateX(100%);*/
/*    transition: transform .25s ease;*/
/*    z-index: 60;*/
/*    display: flex;*/
/*    flex-direction: column;*/
/*    padding: 16px*/
/*}*/

.nav-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    height: 100vh;
    width: 56%;
    max-width: 380px;             /* 保持桌面端不太宽 */
    /*width: min(86vw, 360px);*/
    box-shadow: var(--shadow-lg);
    background: var(--panel);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    /*transition: transform .25s ease;*/
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 60;
    display: flex;
    flex-direction: column;
    padding: 16px;
    border-radius: 12px 0 0 12px; /* 小圆角更像原生抽屉 */
}




.nav-drawer .title {
    font-weight: 700;
    margin-bottom: 10px
}

.nav-drawer a {
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--panel-2);
    color: var(--text);
    margin-bottom: 8px
}

.nav-drawer .spacer {
    flex: 1
}

.nav-drawer .footer {
    display: flex;
    gap: 8px;
    flex-wrap: wrap
}

.nav-drawer.show {
    transform: none
}

.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease;
    z-index: 59;
    backdrop-filter: none;
}

/* FIX: 去掉强模糊，只做半透明遮罩 */
.nav-overlay.show {
    opacity: 1;
    visibility: visible
}

/* ----- Hero ----- */
.hero {
    position: relative;
    overflow: hidden;
    background: radial-gradient(1200px 600px at 50% -10%, color-mix(in oklab, var(--brand) 18%, transparent) 0%, transparent 60%),
    linear-gradient(180deg, var(--panel), var(--bg));
    border-bottom: 1px solid var(--border)
}

.hero-wrap {
    padding: 72px 0 48px;
    display: grid;
    grid-template-columns:1.2fr .8fr;
    gap: 24px
}

@media (max-width: 900px) {
    .hero-wrap {
        grid-template-columns:1fr
    }
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 10px;
    color: var(--muted);
    background: var(--panel-2)
}

.title {
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.2;
    margin: 12px 0 8px
}

.subtitle {
    color: var(--muted);
    max-width: 60ch
}

.hero-card {
    background: linear-gradient(180deg, var(--panel-2), var(--panel));
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow)
}

.hero-actions {
    margin-top: 18px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap
}

.hero-grid {
    display: grid;
    grid-template-columns:repeat(3, 1fr);
    gap: 12px
}

@media (max-width: 700px) {
    .hero-grid {
        grid-template-columns:1fr 1fr
    }
}

.metric {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px
}

.metric .k {
    font-size: 24px;
    font-weight: 800
}

.metric .k sub {
    font-size: 12px;
    color: var(--muted);
    margin-left: 4px
}

/* ----- Sections ----- */
section {
    padding: 64px 0;
    border-bottom: 1px solid var(--border)
}

section:last-of-type {
    border-bottom: 0
}

.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap
}

.section-head h2 {
    font-size: clamp(22px, 3vw, 32px);
    margin: 0
}

.section-desc {
    color: var(--muted);
    max-width: 75ch
}

/* ----- Cards & Grids (default) ----- */
.grid {
    display: grid;
    gap: 16px
}

.grid.people {
    grid-template-columns:repeat(4, 1fr)
}

.grid.research {
    grid-template-columns:repeat(3, 1fr)
}

.grid.pub {
    grid-template-columns:1fr
}

@media (max-width: 1100px) {
    .grid.people {
        grid-template-columns:repeat(3, 1fr)
    }

    .grid.research {
        grid-template-columns:repeat(2, 1fr)
    }
}

@media (max-width: 780px) {
    .grid.people {
        grid-template-columns:repeat(2, 1fr)
    }
}

@media (max-width: 520px) {
    .grid.people {
        grid-template-columns:1fr
    }

    .grid.research {
        grid-template-columns:1fr
    }
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow)
}

.card .body {
    padding: 16px
}

.card .meta {
    color: var(--muted);
    font-size: 14px
}

/* 统一按钮行高度，确保 Email / Profile 对齐（FIX） */
.actions-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
    align-items: center;
    min-height: 42px
}

/* ----- Publication (no thumbnails on home) ----- */
.pub-item {
    display: grid;
    grid-template-columns:1fr auto;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--panel)
}

.pub-item .title {
    font-weight: 700
}

.pub-item .authors, .pub-item .venue {
    color: var(--muted);
    font-size: 14px
}

.pub-actions {
    display: flex;
    gap: 8px;
    align-items: center
}

.pub-actions .btn {
    padding: 8px 10px;
    border-radius: 10px
}

.bibtex {
    display: none;
    margin-top: 8px;
    padding: 10px;
    border-radius: 10px;
    background: #020617;
    color: #e5e7eb;
    overflow: auto
}

.light .bibtex {
    background: #0f172a;
    color: #e5e7eb
}

/* ----- Scroll containers ----- */
.v-scroll {
    max-height: 520px;
    overflow: auto;
    padding-right: 4px
}

#news-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 10px
}

.news-card .body {
    display: flex;
    gap: 10px;
    align-items: flex-start
}

.news-date {
    flex: 0 0 auto;
    font-size: 12px;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 4px 8px;
    background: var(--panel-2)
}

.news-text {
    flex: 1
}

/* ----- Footer ----- */
footer {
    padding: 36px 0;
    color: var(--muted)
}

.foot {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap
}

.foot-left {
    display: flex;
    gap: 10px;
    align-items: center
}

.foot-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap
}

/* ----- Utilities ----- */
:focus-visible {
    outline: 2px solid var(--ring);
    outline-offset: 2px;
    border-radius: 8px
}

.hidden {
    display: none !important
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0
}

/* ---------- Markdown prose (for custom .md sections) ---------- */
.prose {
    margin-top: 16px;
    line-height: 1.7;
}

.prose h1, .prose h2, .prose h3, .prose h4 {
    margin: 1.2em 0 .5em;
    line-height: 1.3
}

.prose h1 {
    font-size: clamp(22px, 3vw, 28px)
}

.prose h2 {
    font-size: clamp(20px, 2.6vw, 24px)
}

.prose h3 {
    font-size: clamp(18px, 2.2vw, 20px)
}

.prose p {
    margin: .6em 0;
    color: var(--text)
}

.prose a {
    color: inherit;
    text-decoration: underline
}

.prose ul, .prose ol {
    padding-left: 1.2em;
    margin: .6em 0
}

.prose li {
    margin: .25em 0
}

.prose img {
    max-width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    margin: .6em 0
}

.prose code {
    font-family: ui-monospace, Menlo, Consolas, monospace;
    background: var(--panel-2);
    padding: .15em .4em;
    border-radius: 6px;
    border: 1px solid var(--border)
}

.prose pre.code {
    background: var(--panel-2);
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: 12px;
    overflow: auto
}

.prose hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 1em 0
}


/* 标签容器与胶囊样式 */
.tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px
}

.tag {
    font-size: 12px;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    background: var(--panel)
}

.pub-actions a[href=""] {
    opacity: .5;
    pointer-events: none;
}

/* 首页 publication 区块（例如 #pub-list 在首页） */
#pub-list .pub-item .title {
    font-size: 0.95rem;
}

/* 独立页（pages/publications.html） */
#pub-all-list .pub-item .title {
    font-size: 1rem;
}


@media (max-width: 768px) {
    .pub-item .title {
        font-size: 0.9rem;
    }
}


/* --- Mobile-first header defaults (prevent FOUC) --- */
@media (max-width: 720px) {
    /* 隐藏桌面内联导航，首屏就不出现 */
    .nav-links-inline {
        display: none !important;
    }

    /* 显示汉堡按钮（如果上面已有同名规则可保留，这里是兜底） */
    #menu {
        display: inline-flex !important;
    }

    /* 品牌名不换行，避免被挤成两行 */
    .brand span {
        white-space: nowrap;
    }

    /* 头部间距在移动端稍微紧凑一点，避免挤压 */
    .nav {
        gap: 10px;
    }
}

/* iOS 安全区增强：仅在有刘海设备上起作用，其他设备值为 0 */
header.site-header {
    padding-top: max(0px, env(safe-area-inset-top));
}

header.site-header .nav {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
}

/* 你的 .controls 里已经处理了右侧；这里补齐左侧兜底（可选） */
.controls {
    padding-left: max(10px, env(safe-area-inset-left));
}

/* 移动端抽屉的内边距也跟随安全区（可选，手感更好） */
.nav-drawer {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-top: calc(16px + env(safe-area-inset-top, 0px));
}

/* 防滚动链路穿透：背景层不把滚动冒泡到页面 */
html, body {
    overscroll-behavior: contain;
}

/* 抽屉 & 遮罩避免误触背景 */
.nav-overlay {
    touch-action: none;
}

.nav-drawer {
    overscroll-behavior: contain;
}


/* --- Publications: mobile layout fix --- */
@media (max-width: 720px) {
    /* 1) 卡片改为上下布局，按钮放到文字下面 */
    .pub-item {
        grid-template-columns: 1fr !important;
        align-items: start;
        gap: 10px;
    }

    .pub-actions {
        justify-content: flex-start;
    }

    /* 2) 标题小一号且避免奇怪断字 */
    #pub-list .pub-item .title,
    #pub-all-list .pub-item .title {
        font-size: 0.95rem !important;
        line-height: 1.35;
        word-break: keep-all; /* 优先整词换行 */
        overflow-wrap: anywhere; /* 实在太长再强制换 */
    }

    /* 3) 按钮触控尺寸适配 */
    .pub-actions .btn {
        padding: 8px 10px;
        border-radius: 10px;
    }
}

/* --- Form controls: dark theme styling --- */
input[type="search"],
select {
    background: var(--panel-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 10px;
    outline: none;
}

input[type="search"]::placeholder {
    color: var(--muted);
}

input[type="search"]:focus,
select:focus {
    outline: 2px solid var(--ring);
    outline-offset: 1px;
}


@media (max-width: 720px) {
    .filters-mobile summary {
        padding: 8px 10px;
        border: 1px solid var(--border);
        border-radius: 10px;
        background: var(--panel-2)
    }

    .filters-mobile[open] {
        padding: 8px;
        border: 1px solid var(--border);
        border-radius: 12px;
        background: var(--panel)
    }

    .filters-mobile > *:not(summary) {
        margin-top: 8px;
        display: block
    }

    .filters-mobile input, .filters-mobile select {
        width: 100%
    }
}

@media (max-width: 720px) {
    .hero-wrap {
        padding: 56px 0 36px
    }

    .subtitle {
        max-width: 100%
    }
}

/* ========= Auto Hero Top Gap (自适应导航高度) ========= */

/* 默认变量值 */
:root {
    --hero-top-gap: 48px; /* 桌面端舒适留白 */
}

/* hero 使用这个变量控制上边距 */
.hero-wrap {
    padding-top: var(--hero-top-gap);
}

/* 手机默认更紧凑，JS 会再动态覆盖 */
@media (max-width: 720px) {
    :root {
        --hero-top-gap: 24px;
    }
}

/* ========= Header Safe-Area Enhancement（iOS 刘海/圆角） ========= */
/* 说明：
   - 在有安全区的设备（iPhone 刘海/动态岛）上，env(safe-area-inset-*) 会返回 >0 的值；
   - 其它设备值为 0，不会改变原有布局。 */

header.site-header {
    /* 顶部让出安全区，避免被遮挡 */
    padding-top: max(0px, env(safe-area-inset-top));
}

/* 头部左右也让出安全区，保证 GitHub/菜单不贴边 */
header.site-header .nav {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
}

/* 你的 .controls 原本只做了右侧安全留白，这里补齐左侧兜底（不与原有规则冲突） */
.controls {
    padding-left: max(10px, env(safe-area-inset-left));
    padding-right: max(10px, env(safe-area-inset-right));
}

/* 移动端抽屉同样尊重安全区（触控更舒服） */
.nav-drawer {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-top: calc(16px + env(safe-area-inset-top, 0px));
}

/* ========= Auto Hero Top Gap（自适应导航高度） ========= */
:root {
    --hero-top-gap: 48px; /* 桌面端默认的舒适留白 */
}

/* 让 hero 真正使用变量作为顶部内边距 */
.hero-wrap {
    padding-top: var(--hero-top-gap);
}

/* 手机初始更紧凑（JS 会覆盖为 headerHeight+8px） */
@media (max-width: 720px) {
    :root {
        --hero-top-gap: 24px;
    }
}

.btn, button, .chip {
    min-height: 44px;
}

/* ---- Back-to-top (mobile + desktop) ---- */
#to-top{
    position: fixed;
    right: clamp(16px, 2vw, 28px);
    bottom: clamp(18px, 3vh, 32px);
    z-index: 1000;                   /* 略高一点，避免被内容覆盖 */
    box-shadow: var(--shadow);
    min-width: 44px;               /* 更好的命中面积 */
    min-height: 44px;
    padding: 0 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    opacity: .95;
    transition: transform .15s ease, opacity .15s ease;
}
#to-top:hover{ transform: translateY(-1px); }

/* 手机端保持更靠内的边距（避免和手势冲突） */
@media (max-width: 720px){
    #to-top{
        right: 16px;
        bottom: 18px;
    }
}


/*!* ---- Back-to-top (mobile only) ---- *!*/
/*#to-top {*/
/*    position: fixed;*/
/*    right: 16px;*/
/*    bottom: 18px;*/
/*    z-index: 70; !* 高于内容，低于抽屉(60)没关系；若需浮在抽屉上可调到 80+ *!*/
/*    box-shadow: var(--shadow);*/
/*}*/

/*@media (min-width: 721px) {*/
/*    #to-top {*/
/*        display: none;*/
/*    }*/

/*    !* 仅手机显示 *!*/
/*}*/


/* ===== Lightbox (dialog) ===== */
dialog.lightbox{
    padding: 0;
    border: 0;
    /* 让 dialog 自身全屏，只做容器；用 flex 居中承载图片 */
    width: 100vw;
    height: 100vh;
    max-width: none;
    max-height: none;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 背景蒙层 */
dialog.lightbox::backdrop{
    background: rgba(0,0,0,.72);
    backdrop-filter: blur(2px);
}

/* 预览大图：桌面不再真正“满屏”，给出边距方便点击关闭 */
dialog.lightbox img{
    max-width: min(96vw, 1600px);
    max-height: 92vh;
    border-radius: 12px;
    box-shadow: 0 12px 36px rgba(0,0,0,.45);
    cursor: zoom-out; /* 告诉用户“再点一下就缩回” */
}

/* 缩略图可选：提示可放大 */
#life-grid img.project-cover{ cursor: zoom-in; }