:root{
    --bg:#fff;
    --ink:#000;
    --ink-soft: rgba(0,0,0,.62);
    --ink-faint: rgba(0,0,0,.22);
    --line: rgba(0,0,0,.18);
    --line2: rgba(0,0,0,.10);
    --shadow: rgba(0,0,0,.06);
}

*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{
    background: var(--bg);
    color: var(--ink);
    font-family: Arial, sans-serif;
    overflow-x:hidden;
}

/* 网格：避免亚像素导致“100%缩放消失” */
body::before{
    content:"";
    position:fixed; inset:0;
    pointer-events:none;
    background-image:
            linear-gradient(to right, var(--line) 1px, transparent 1px),
            linear-gradient(to bottom, var(--line2) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity:.35;
    z-index:0;
}

/* 三方背景 canvas */
#bg{
    position:fixed; inset:0;
    width:100vw;height:100vh;
    z-index:0;
    pointer-events:none;
}

/* 四角导航（延用主页面） */
.nav{
    position:fixed;
    inset:0;
    z-index:20;
    pointer-events:none;
}
.nav-btn{
    position:fixed;
    width:240px;
    height:80px;
    display:flex;
    align-items:center;
    justify-content:center;

    background: transparent;
    border:2px solid var(--ink);
    color: var(--ink);
    text-decoration:none;

    font-size:1rem;
    letter-spacing:.5px;
    user-select:none;
    cursor:pointer;

    pointer-events:auto;
    transition: transform .15s ease, background .2s ease;
}
.nav-btn:hover{
    background: rgba(0,0,0,.03);
    transform: translateY(-1px);
}

#aboutBtn{ left:20px; top:20px; }
#langBtn{ right:20px; top:20px; }
#homeBtn{ left:20px; bottom:20px; }
#commBtn{ right:20px; bottom:20px; }

/* MODAL */
.modal{
    display:none;
    position:fixed; inset:0;
    background: rgba(255,255,255,.88);
    z-index:50;
}
.modal-content{
    position:relative;
    width:min(520px, 92vw);
    margin: 12vh auto 0;
    padding: 22px 18px;
    background:#fff;
    border:2px solid var(--ink);
    box-shadow: 0 10px 30px var(--shadow);
}
.modal-content h2{
    font-family: "Courier New", monospace;
    letter-spacing:2px;
    font-size: 1.4rem;
    margin-bottom: 14px;
}
.close{
    position:absolute;
    right:12px; top:10px;
    border:0;
    background:transparent;
    font-size: 30px;
    color: var(--ink);
    cursor:pointer;
}
.lang-option,.social-link{
    display:block;
    width:100%;
    padding:14px 12px;
    margin:10px 0;
    border:2px solid var(--ink);
    background:transparent;
    color:var(--ink);
    text-decoration:none;
    cursor:pointer;
    font-size:1rem;
}
.lang-option:hover,.social-link:hover{ background: rgba(0,0,0,.03); }

/* 页面容器 */
.page{
    position:relative;
    z-index:10;
    width:min(1120px, 92vw);
    margin: 0 auto;
    padding: 120px 0 56px;
}

.mono{ font-family:"Courier New", monospace; }

/* HERO */
.hero{
    position:relative;
    padding: 36px 0 28px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 26px;
}
.kicker{
    font-family:"Courier New", monospace;
    letter-spacing: 4px;
    font-size: .95rem;
    color: var(--ink-soft);
    margin-bottom: 12px;
}
.title{
    position:relative;
    font-size: clamp(44px, 6vw, 84px);
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1.02;
}
.title-ghost{
    position:absolute;
    left:0; top:0;
    transform: translate(2px, 2px);
    color: rgba(0,0,0,.12);
    pointer-events:none;
    user-select:none;
}
.lead{
    margin-top: 14px;
    max-width: 80ch;
    color: var(--ink);
    line-height: 1.75;
}
.meta{
    margin-top: 16px;
    display:flex;
    flex-wrap:wrap;
    gap: 10px;
}
.pill{
    border:2px solid var(--ink);
    padding: 6px 10px;
    font-size: .9rem;
    letter-spacing: 1px;
    color: var(--ink-soft);
    background: rgba(255,255,255,.7);
}

.scanline{
    position:absolute;
    left:0; right:0;
    bottom:-1px;
    height:2px;
    background: var(--ink);
    transform-origin:left center;
    transform: scaleX(0);
    opacity:.65;
}

/* MATRIX */
.matrix{
    display:grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

/* 每个导航块 */
.node{
    border:2px solid var(--ink);
    background: rgba(255,255,255,.78);
    padding: 16px 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,.03);
    transition: transform .15s ease, background .2s ease;
}
.node:hover{
    transform: translateY(-2px);
    background: rgba(255,255,255,.95);
}
.node-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap: 14px;
    margin-bottom: 10px;
}
.h2{
    font-family:"Courier New", monospace;
    letter-spacing: 3px;
    font-size: 1.1rem;
    text-transform: uppercase;
}
.hint{
    color: var(--ink-soft);
    font-size: .85rem;
    white-space: nowrap;
}
.desc{
    color: var(--ink);
    line-height: 1.65;
    margin-bottom: 12px;
    max-width: 70ch;
}

/* 链接组：像“目录条目” */
.links{
    display:flex;
    flex-direction:column;
    gap: 8px;
}
.link{
    border:1px solid var(--line);
    padding: 10px 10px;
    text-decoration:none;
    color: var(--ink);
    background: rgba(255,255,255,.6);
    transition: background .2s ease, border-color .2s ease;
}
.link:hover{
    background: rgba(0,0,0,.03);
    border-color: rgba(0,0,0,.35);
}

/* reveal */
.reveal{
    opacity:0;
    transform: translateY(10px);
    transition: opacity .8s ease, transform .8s ease;
}
.reveal.show{
    opacity:1;
    transform: translateY(0);
}

/* FOOTER */
.footer{
    padding: 28px 0 10px;
    text-align:center;
}
.footer-line{
    height:1px;
    background: var(--line);
    margin: 22px 0 16px;
}
.logo{
    width: 120px;
    height: auto;
    display:block;
    margin: 0 auto 10px;
}
.footer-meta{
    color: var(--ink-soft);
    letter-spacing: 2px;
    font-size: .9rem;
}

/* responsive */
@media (max-width: 980px){
    .matrix{ grid-template-columns: 1fr; }
}
@media (max-width: 900px){
    .nav-btn{ width: 200px; height: 70px; }
}
@media (max-width: 640px){
    #aboutBtn,#langBtn{ top:12px; }
    #homeBtn,#commBtn{ bottom:12px; }
    #aboutBtn,#homeBtn{ left:12px; }
    #langBtn,#commBtn{ right:12px; }

    .nav-btn{ width: 160px; height: 60px; font-size:.95rem; }
    .page{ padding-top: 110px; }
}