/* ============================================================
   各页面特定样式 (首页各板块)
============================================================ */

/* --- 渐进式浮现动画类 --- */
.fade-in-section {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   首屏 Banner (星空背景)
============================================================ */
#home {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding-top: var(--nav-height);
    background-color: #070b1a; /* 使用深色夜空底色以确保高对比度 */
}
#starCanvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
}
/* 光晕装饰 */
.banner-glow {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 2;
    filter: blur(80px);
    opacity: 0.5;
}
.glow-1 { width: 380px; height: 380px; background: radial-gradient(circle, rgba(79,110,247,0.25), transparent 70%); top: -8%; left: 10%; animation: float1 10s ease-in-out infinite; }
.glow-2 { width: 300px; height: 300px; background: radial-gradient(circle, rgba(124,92,252,0.2), transparent 70%); bottom: -5%; right: 8%; animation: float2 12s ease-in-out infinite; }
.glow-3 { width: 220px; height: 220px; background: radial-gradient(circle, rgba(79,110,247,0.18), transparent 70%); top: 50%; left: 55%; animation: float3 9s ease-in-out infinite; }

@keyframes float1 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(-20px,20px) scale(0.95)} }
@keyframes float2 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(20px,15px) scale(1.05)} }
@keyframes float3 { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(-15px,-15px) scale(0.9)} }

.banner-content {
    position: relative;
    z-index: 3;
    max-width: 700px;
    padding: 0 24px;
}
.banner-badge {
    display: inline-block;
    padding: 6px 18px;
    font-size: 0.85rem;
    font-weight: 500;
    color: #e8ecff;
    background: rgba(79, 110, 247, 0.25);
    border-radius: 20px;
    margin-bottom: 22px;
    letter-spacing: 0.3px;
}
.banner-title {
    font-size: clamp(2.2rem, 4.5vw, 3.2rem);
    font-weight: 700;
    color: #fff;
    letter-spacing: -1.5px; /* 增加负留白 */
    line-height: 1.25;
    margin-bottom: 16px;
}
.banner-title .gradient-text {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    position: relative;
    overflow: hidden;
}
/* 金属高光扫过动画 */
.banner-title .gradient-text::after {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.4), transparent);
    transform: skewX(-20deg);
    animation: shine 4s infinite;
}
@keyframes shine {
    0% { left: -100%; }
    20% { left: 200%; }
    100% { left: 200%; }
}
.banner-subtitle {
    font-size: 1.15rem;
    color: #bcc4d6;
    line-height: 1.6;
}
/* 桌面端：三个句子用 ； 分隔符连接，保持一行 */
.banner-subtitle-line::after {
    content: '；';
}
.banner-subtitle-line:last-child::after {
    content: '';
}
/* 手机端：三个句子各占一行，居中显示，去掉分隔符 */
@media (max-width: 768px) {
    .banner-subtitle {
        font-size: 1rem;
        line-height: 1.8;
    }
    .banner-subtitle-line {
        display: block;
        text-align: center;
    }
    .banner-subtitle-line::after {
        content: '';
    }
}
.banner-arrow {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    opacity: 0.6;
    animation: bounce 2s infinite;
}
.banner-arrow svg { stroke: #bcc4d6; }
@keyframes bounce { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,10px)} }

/* ============================================================
   个人简介板块
============================================================ */
#about {
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 960px;
    margin: 0 auto;
    align-items: center;
}
.about-text h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}
.about-text .bio-content {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.75;
}
.about-text .bio-content p { margin-bottom: 12px; }
.about-text .bio-content strong { color: var(--color-text); }
.about-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}
.about-highlights .tag {
    background: var(--color-accent-light);
    color: var(--color-accent-dark);
}

.about-image-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 28px;
    text-align: center;
}
.about-image-card img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
}

/* ============================================================
   核心技能板块
============================================================ */
#skills {
    background: var(--color-bg);
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 18px;
    max-width: 1000px;
    margin: 0 auto;
}
.skill-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 26px 20px 22px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast);
}
.skill-card::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 32px; height: 3px;
    border-radius: 0 0 4px 4px;
    background: var(--color-accent-gradient);
    opacity: 0;
    transition: all var(--transition-fast);
}
.skill-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.skill-card:hover::before {
    opacity: 1;
    width: 48px;
}
.skill-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}
.skill-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
}
.skill-desc {
    font-size: 0.78rem;
    color: var(--color-text-light);
    margin-top: 8px;
}

/* ============================================================
   作品展示板块矩阵
============================================================ */
#works {
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
}
.works-category-section {
    margin-bottom: 64px;
}
.works-category-section:last-child {
    margin-bottom: 0;
}
.category-header {
    margin-bottom: 24px;
}
.category-title {
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
    font-weight: 700;
    color: var(--color-text);
}
.works-grid {
    display: grid;
    /* 强制3列布局，不足3列时保持原有宽度不拉伸 */
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.work-card {
    background: rgba(255, 255, 255, 0.6); /* 毛玻璃半透明白 */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 28px 24px 24px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-fast);
    cursor: pointer;
}
.work-card::after {
    content: '';
    position: absolute;
    top: 0; left: 20px; right: 20px;
    height: 3px;
    border-radius: 0 0 3px 3px;
    background: var(--card-accent-color, var(--color-border));
    transition: all var(--transition-fast);
}
.work-card:hover {
    transform: translateY(-8px);
    /* 动态阴影发光，颜色由 js 注入的 --card-glow-color 决定 */
    box-shadow: 0 10px 36px var(--card-glow-color, rgba(79, 110, 247, 0.13));
}
.work-card:hover::after {
    height: 5px;
    left: 0; right: 0;
}
.work-index {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-light);
    font-weight: 600;
}
.work-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
    margin-top: 14px;
}
.work-desc {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    margin-top: 10px;
    flex-grow: 1;
}
.work-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

/* 空状态卡片 */
.work-card.empty-state {
    background: var(--color-tag-bg);
    border: 1px dashed var(--color-border);
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 200px;
    cursor: default;
}
.work-card.empty-state:hover { transform: none; box-shadow: none; }
.work-card.empty-state::after { display: none; }
.work-card.empty-state p { color: var(--color-text-light); font-size: 0.9rem; margin-bottom: 8px; }
.work-card.empty-state a { color: var(--color-accent); font-weight: 500; font-size: 0.9rem; }

/* 响应式调整 */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; }
    .about-image-card img { max-width: 300px; margin: 0 auto; }
    .works-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .works-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
}