/* index.css — 社区首页专属样式（通用主题见 theme.css） */

body {
    align-items: normal;
}

/* 选中文字着色，与品牌色一致 */
::selection {
    background: var(--accent-glow);
    color: var(--fg);
}

@media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1.3rem;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    line-height: 1.4;
    transition: opacity 0.15s, transform 0.18s, background 0.18s, border-color 0.18s, box-shadow 0.22s;
}
.btn:active { transform: scale(0.96); }

/* 主按钮：品牌渐变 + hover 上浮与扫光 */
.btn-primary {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: #fff;
    box-shadow: 0 2px 10px rgba(232, 133, 58, 0.32);
}
.btn-primary::after {
    content: "";
    position: absolute;
    top: 0;
    left: -80%;
    width: 50%;
    height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    transition: left 0.5s ease;
    pointer-events: none;
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(232, 133, 58, 0.4);
}
.btn-primary:hover::after { left: 130%; }
.btn-primary:active { transform: scale(0.96); }

.btn-ghost {
    background: var(--accent-soft);
    color: var(--accent-dark);
    border-color: var(--accent-glow);
}
.btn-ghost:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn-lg { padding: 0.75rem 2rem; font-size: 1rem; border-radius: 999px; letter-spacing: 0.02em; }

/* ===== 头部：悬浮毛玻璃导航（镜像 minimap/userpanel 风格） ===== */
.header {
    position: sticky;
    top: 0.75rem;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-lg);
    background: rgba(253, 246, 238, 0.72);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    box-shadow: var(--shadow-md);
    transition: background 0.2s, border-color 0.2s;
}
@media (prefers-color-scheme: dark) {
    .header {
        background: rgba(30, 23, 18, 0.72);
        border-color: var(--border);
    }
}

.header h1 {
    display: flex;
    align-items: center;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
}
.header h1:hover { color: var(--accent); }

.right-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
}

#avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    object-fit: cover;
}

#name {
    font-size: 0.88rem;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#main-page { width: 100%; }

/* ===== Hero 首屏 ===== */
.hero {
    position: relative;
    text-align: center;
    padding: 4.5rem 1rem 5.5rem;
    overflow: hidden;
}
/* 点阵底纹：中心清晰、四周渐隐 */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--border) 1.2px, transparent 1.2px);
    background-size: 26px 26px;
    -webkit-mask-image: radial-gradient(ellipse 70% 62% at 50% 42%, #000 25%, transparent 72%);
    mask-image: radial-gradient(ellipse 70% 62% at 50% 42%, #000 25%, transparent 72%);
    pointer-events: none;
}
/* 暖色环境光晕 */
.hero::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 46%;
    width: 680px;
    height: 680px;
    transform: translate(-50%, -50%);
    background:
        radial-gradient(circle, var(--accent-glow), transparent 60%),
        radial-gradient(ellipse 55% 40% at 50% 62%, var(--accent-soft), transparent 70%);
    opacity: 0.55;
    pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }

/* 品牌装饰：节点树（低透明度衬底，不干扰阅读） */
.hero-tree {
    position: absolute;
    left: 50%;
    bottom: -8px;
    transform: translateX(-50%);
    width: min(600px, 96%);
    height: auto;
    color: var(--accent);
    opacity: 0.16;
    pointer-events: none;
}
@media (prefers-color-scheme: dark) {
    .hero-tree { opacity: 0.2; }
}

/*  eyebrow 徽章：呼吸圆点 + 胶囊 */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.95rem;
    margin-bottom: 1.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border: 1px solid var(--accent-glow);
    border-radius: 999px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex: none;
}

.hero-title {
    font-size: clamp(2.1rem, 6.5vw, 3.3rem);
    font-weight: 800;
    line-height: 1.26;
    letter-spacing: 0.04em;
    text-wrap: balance;
    margin-bottom: 1.1rem;
}
/* 渐变标题字：缓慢流光 */
.accent-text {
    background: linear-gradient(120deg, var(--accent) 15%, var(--accent-dark) 45%, var(--accent) 85%);
    background-size: 220% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-sub {
    font-size: 1.08rem;
    letter-spacing: 0.03em;
    color: var(--fg-secondary);
    max-width: 32rem;
    margin: 0 auto;
    line-height: 1.75;
}
.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 2.2rem;
}

/* 下滑提示：浮动小箭头（窄屏隐藏） */
.scroll-hint {
    position: absolute;
    left: 50%;
    bottom: 1.3rem;
    transform: translateX(-50%);
    z-index: 1;
    display: flex;
    color: var(--muted);
    transition: color 0.2s;
}
.scroll-hint:hover { color: var(--accent); }
.scroll-hint svg { width: 22px; height: 22px; }

/* ===== 章节标题：eyebrow + 标题 + 渐变短杠 ===== */
.section-eyebrow {
    text-align: center;
    margin-top: 4.5rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.28em;
    text-indent: 0.28em; /* 视觉居中补偿字距 */
    color: var(--accent);
}
.section-title {
    text-align: center;
    margin-top: 0.7rem;
    font-size: 1.55rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}
.section-title::after {
    content: "";
    display: block;
    width: 46px;
    height: 3px;
    margin: 0.65rem auto 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    opacity: 0.9;
}

/* ===== 特性卡片：序号水印 + 光标光斑 + 图标点亮 ===== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.1rem;
    width: 100%;
    max-width: 960px;
    margin: 2rem auto 0;
    counter-reset: feat;
}
.feature-card {
    counter-increment: feat;
    position: relative;
    background: var(--card);
    /* 光标光斑：JS 写入 --mx/--my，缺省停在顶部中央 */
    background-image: radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), var(--accent-soft), transparent 75%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.8rem 1.5rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform 0.22s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    opacity: 0;
    transition: opacity 0.25s;
}
/* 序号水印（编辑感装饰） */
.feature-card::after {
    content: "0" counter(feat);
    position: absolute;
    top: 1rem;
    right: 1.2rem;
    font-size: 1.55rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--border);
    transition: color 0.25s;
    pointer-events: none;
}
.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}
.feature-card:hover::before { opacity: 0.9; }
.feature-card:hover::after { color: var(--accent-glow); }
.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    margin-bottom: 0.95rem;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--accent-soft), rgba(232, 133, 58, 0.16));
    color: var(--accent-dark);
    transition: transform 0.25s, background 0.25s, color 0.25s, box-shadow 0.25s;
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff;
    transform: translateY(-2px) scale(1.06);
    box-shadow: 0 6px 14px rgba(232, 133, 58, 0.35);
}
.feature-card h3 { margin-bottom: 0.4rem; font-size: 1.05rem; letter-spacing: 0.01em; }
.feature-card p {
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--fg-secondary);
}

/* ===== 关于本站 ===== */
.about {
    text-align: center;
    padding: 1rem 1rem 3.5rem;
    max-width: 780px;
    margin: 0 auto;
}
.about .section-eyebrow, .about .section-title { margin-top: 0; }
.about .site-intro {
    position: relative;
    background: var(--card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 2rem 2.2rem;
    margin-top: 2rem;
    overflow: hidden;
}
/* 左侧品牌渐变条 + 右上角装饰引号 */
.about .site-intro::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--accent), var(--accent-dark));
    opacity: 0.85;
}
.about .site-intro::after {
    content: "”";
    position: absolute;
    top: -0.6rem;
    right: 1.1rem;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 5rem;
    line-height: 1;
    color: var(--accent-soft);
    pointer-events: none;
}
.site-intro {
    font-size: 0.96rem;
    line-height: 1.95;
    color: var(--fg-secondary);
}
/* 快捷链接：胶囊按钮 */
.quick-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1.9rem;
}
.quick-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1.15rem;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--fg-secondary);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 999px;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: color 0.18s, border-color 0.18s, transform 0.18s, box-shadow 0.2s;
}
.quick-links a::after {
    content: "→";
    font-size: 0.85em;
    transition: transform 0.18s;
}
.quick-links a:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.quick-links a:hover::after { transform: translateX(3px); }

/* ===== 入场动画（首屏元素，页面加载即播） ===== */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: none; }
}
/* 品牌树：枝干描绘 + 节点弹出 + 整体轻摆 */
@keyframes tree-draw { to { stroke-dashoffset: 0; } }
@keyframes node-in {
    from { opacity: 0; transform: scale(0); }
    to { opacity: 1; transform: scale(1); }
}
@keyframes tree-sway {
    0%, 100% { transform: translateX(-50%) rotate(0deg); }
    50% { transform: translateX(-50%) rotate(0.7deg); }
}
@keyframes text-shine { to { background-position: 220% center; } }
@keyframes badge-pulse {
    0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
    50% { box-shadow: 0 0 0 5px transparent; }
}
@keyframes hint-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

@media (prefers-reduced-motion: no-preference) {
    .hero-inner > * { animation: fade-up 0.55s ease both; }
    .hero-title { animation-delay: 0.06s; }
    .hero-sub { animation-delay: 0.14s; }
    .hero-actions { animation-delay: 0.22s; }
    .accent-text { animation: text-shine 7s linear infinite; }
    .badge-dot { animation: badge-pulse 2.4s ease-in-out infinite; }
    .scroll-hint svg { animation: hint-bounce 2s ease-in-out infinite; }

    .hero-tree { animation: tree-sway 10s ease-in-out 2.8s infinite; }
    .hero-tree path {
        stroke-dasharray: 100;
        stroke-dashoffset: 100;
        animation: tree-draw 0.9s ease-out forwards;
    }
    .hero-tree path:nth-of-type(1) { animation-delay: 0.15s; }
    .hero-tree path:nth-of-type(2),
    .hero-tree path:nth-of-type(3) { animation-delay: 0.75s; }
    .hero-tree path:nth-of-type(n+4) { animation-delay: 1.35s; }
    .hero-tree circle {
        opacity: 0;
        transform-box: fill-box;
        transform-origin: center;
        animation: node-in 0.45s ease-out forwards;
    }
    .hero-tree circle:nth-of-type(1) { animation-delay: 0.2s; }
    .hero-tree circle:nth-of-type(2) { animation-delay: 0.85s; }
    .hero-tree circle:nth-of-type(3),
    .hero-tree circle:nth-of-type(4) { animation-delay: 1.45s; }
    .hero-tree circle:nth-of-type(n+5) { animation-delay: 2s; }
}

/* ===== 滚动渐显（JS 加 .reveal 隐藏、入场加 .reveal-in；无 JS 时天然可见） ===== */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.reveal-in { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
/* 触屏设备：加大可点目标 */
@media (hover: none) and (pointer: coarse) {
    .btn { min-height: 44px; }
    .quick-links a { padding: 0.6rem 1.1rem; }
}

/* 平板及以下：收敛首屏光晕与留白 */
@media (max-width: 768px) {
    body { padding: 1.25rem 0.75rem; }
    .hero { padding: 3.5rem 1.25rem 4rem; }
    .hero::after { width: 440px; height: 440px; opacity: 0.45; }
    .hero-tree { width: 130%; opacity: 0.12; }
    .hero-title { letter-spacing: 0.02em; }
    .features { gap: 0.9rem; }
    .feature-card { padding: 1.5rem 1.25rem; }
}

/* 手机：全宽布局、紧凑排版 */
@media (max-width: 480px) {
    body { padding: 1rem 0.75rem; }
    .header {
        top: 0.5rem;
        padding: 0.45rem 0.85rem;
        gap: 0.4rem;
    }
    .header h1 { font-size: 1rem; }
    .header h1 svg { display: none; } /* 小屏隐藏 logo 图标，避免挤压 */
    .right-group { gap: 0.35rem; }
    .right-group .btn { padding: 0.5rem 0.95rem; font-size: 0.82rem; }
    #name { max-width: 72px; }

    .hero { padding: 2.75rem 0.75rem 2.5rem; }
    .hero::after { width: 310px; height: 310px; opacity: 0.35; }
    .hero-tree { width: 160%; opacity: 0.1; }
    .hero-badge { font-size: 0.74rem; padding: 0.3rem 0.8rem; margin-bottom: 1.1rem; }
    .hero-title { margin-bottom: 0.8rem; }
    .hero-sub { font-size: 0.95rem; }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.65rem;
    }
    .hero-actions .btn-lg { width: 100%; padding: 0.85rem 1.5rem; }
    .scroll-hint { display: none; }

    .section-eyebrow { margin-top: 2.75rem; }
    .section-title { font-size: 1.3rem; }
    .features { margin-top: 1.25rem; grid-template-columns: 1fr; }
    .feature-card:hover { transform: none; } /* 触屏取消悬浮位移 */

    .about { padding: 0.5rem 0.5rem 2.5rem; }
    .about .site-intro { padding: 1.5rem 1.4rem; text-align: left; }
    .about .site-intro::after { font-size: 3.5rem; right: 0.8rem; }
    .quick-links { gap: 0.6rem 0.8rem; margin-top: 1.5rem; }
}

/* 超小屏 */
@media (max-width: 360px) {
    .hero { padding: 2.25rem 0.5rem 2rem; }
    .header h1 { font-size: 0.95rem; }
    .right-group .btn { padding: 0.45rem 0.8rem; font-size: 0.8rem; }
}