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

body {
    align-items: normal;
}

@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 0.1s, background 0.15s, border-color 0.15s;
}
.btn:active { transform: scale(0.96); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); opacity: 1; }
.btn-ghost { background: var(--accent-soft); color: var(--accent-dark); }
.btn-ghost:hover { border-color: var(--accent); opacity: 1; }
.btn-lg { padding: 0.7rem 1.9rem; font-size: 1rem; border-radius: var(--radius-md); }

/* ===== 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: 0.5rem 1rem;
    border-radius: var(--radius-md);
    background: rgba(253, 246, 238, 0.72);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    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 {
    font-size: 1.15rem;
    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;
}

/* ===== Hero 首屏 ===== */
.hero {
    position: relative;
    text-align: center;
    padding: 4rem 1rem 3rem;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 50% at 50% 30%, var(--accent-glow), transparent 70%);
    pointer-events: none;
}
.hero > * { position: relative; }
.hero-title {
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: 0.02em;
    margin-bottom: 0.75rem;
}
.accent-text { color: var(--accent); }
.hero-sub {
    font-size: 1.05rem;
    color: var(--fg-secondary);
}
.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.75rem;
}

/* ===== 特性卡片 ===== */
.section-title {
    text-align: center;
    margin-top: 3rem;
}
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 0.9rem;
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
}
.feature-card {
    background: var(--card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1.4rem 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.18s, box-shadow 0.2s, border-color 0.2s;
}
.feature-card:hover {
    transform: translateY(-3px);
    border-color: var(--border);
    box-shadow: var(--shadow-md);
}
.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    margin-bottom: 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--accent-soft);
    color: var(--accent-dark);
}
.feature-icon svg { width: 20px; height: 20px; }
.feature-card h3 { margin-bottom: 0.35rem; }
.feature-card p {
    font-size: 0.86rem;
    line-height: 1.65;
    color: var(--fg-secondary);
}

/* ===== 关于本站 ===== */
.about {
    text-align: center;
    padding-bottom: 2rem;
}
.site-intro {
    max-width: 640px;
    margin: 0 auto;
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--fg-secondary);
}
.quick-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-top: 1.5rem;
}
.quick-links a {
    font-size: 0.85rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.15s;
}
.quick-links a:hover { color: var(--accent); }

/* ===== 入场动画 ===== */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: no-preference) {
    .hero > *, .feature-card, .about { animation: fade-up 0.5s ease both; }
    .hero-sub { animation-delay: 0.08s; }
    .hero-actions { animation-delay: 0.16s; }
    .feature-card:nth-child(2) { animation-delay: 0.06s; }
    .feature-card:nth-child(3) { animation-delay: 0.12s; }
    .feature-card:nth-child(4) { animation-delay: 0.18s; }
}

/* ===== 响应式 ===== */
@media (max-width: 480px) {
    .header { top: 0.5rem; padding: 0.45rem 0.75rem; }
    .header h1 { font-size: 1rem; }
    #name { max-width: 72px; }
    .hero { padding: 2.5rem 0.5rem 2rem; }
    .hero-sub { font-size: 0.95rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .section-title { margin-top: 2rem; }
}