/* Endfield Stylized CSS V3 - Advanced Tech Edition */
:root {
    --bg-main: #FFFFFF;
    --bg-secondary: #F2F2F2;
    --bg-card: #FFFFFF;
    --text-main: #121212;
    --text-dim: #666666;
    --accent: #F9F01A; /* Endfield Yellow */
    --accent-glow: rgba(249, 240, 26, 0.3);
    --secondary: #121212;
    --border-light: #EBEBEB;
    --border-dark: #121212;
    --grid-line: rgba(0, 0, 0, 0.03);
    --scanline-color: rgba(0, 0, 0, 0.02);
    --font-primary: 'Inter', 'PingFang SC', -apple-system, sans-serif;
    --font-mono: 'Roboto Mono', monospace;
    --hatch-pattern: repeating-linear-gradient(45deg, transparent, transparent 5px, rgba(0,0,0,0.03) 5px, rgba(0,0,0,0.03) 10px);
    --dot-pattern: radial-gradient(rgba(0,0,0,0.1) 1px, transparent 1px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

@keyframes flicker {
    0% { opacity: 0.8; }
    5% { opacity: 0.5; }
    10% { opacity: 0.9; }
    15% { opacity: 0.6; }
    20% { opacity: 1; }
    100% { opacity: 1; }
}

@keyframes caution-slide {
    0% { background-position: 0 0; }
    100% { background-position: 40px 0; }
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--scanline-color);
    z-index: 9999;
    pointer-events: none;
    animation: scanline 8s linear infinite;
}

/* 装饰性背景层 */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.bg-grid {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 50px 50px;
}

.bg-dots {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: var(--dot-pattern);
    background-size: 15px 15px;
    opacity: 0.3;
}

.ghost-text {
    position: fixed;
    font-size: 18vw;
    font-weight: 900;
    color: rgba(0, 0, 0, 0.015);
    font-family: var(--font-mono);
    z-index: -2;
    white-space: nowrap;
    user-select: none;
    text-transform: uppercase;
    letter-spacing: -5px;
}

.ghost-text.t1 { top: -2%; left: -2%; transform: rotate(-2deg); }
.ghost-text.t2 { bottom: -2%; right: -2%; transform: rotate(2deg); }

/* 布局容器 */
.container {
    display: flex;
    max-width: 1800px;
    margin: 0 auto;
    min-height: 100vh;
    position: relative;
}

/* 侧边栏 */
.sidebar {
    width: 400px;
    background-color: var(--bg-card);
    padding: 60px 40px;
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 10;
    clip-path: polygon(0 0, 100% 0, 100% 95%, 85% 100%, 0 100%);
}

.profile-card {
    flex-grow: 1;
}

.avatar-container {
    position: relative;
    width: 240px;
    height: 240px;
    margin: 0 auto 40px;
    background-color: var(--bg-secondary);
    padding: 10px;
    clip-path: polygon(10% 0, 100% 0, 100% 90%, 90% 100%, 0 100%, 0 10%);
}

.avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: grayscale(0.2) contrast(1.1);
}

/* 装饰角标 */
.corner {
    position: absolute;
    width: 25px;
    height: 25px;
    border: 4px solid var(--accent);
    z-index: 2;
    transition: all 0.3s;
}
.corner-tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.corner-br { bottom: 0; right: 0; border-left: none; border-top: none; }

.avatar-container:hover .corner {
    width: 40px;
    height: 40px;
}

.name-group {
    text-align: left;
    margin-bottom: 35px;
    position: relative;
    padding-left: 15px;
}

.name-group::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 6px;
    height: 100%;
    background-color: var(--accent);
}

.name {
    font-size: 36px;
    font-weight: 900;
    letter-spacing: -1.5px;
}

.name small {
    display: block;
    font-size: 16px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    margin-top: 6px;
    letter-spacing: 2px;
}

.headline {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--secondary);
    background-color: var(--accent);
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: 30px;
    font-weight: 900;
    clip-path: polygon(0 0, 90% 0, 100% 100%, 0 100%);
}

.affiliation {
    font-size: 14px;
    color: var(--text-dim);
    margin-bottom: 45px;
    line-height: 1.6;
    border-left: 2px solid var(--border-light);
    padding-left: 15px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 50px;
}

.contact-item {
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    padding: 10px;
    background: transparent;
    transition: all 0.3s;
}

.contact-item:hover {
    background: var(--bg-secondary);
    transform: translateX(5px);
}

.contact-item .label {
    display: block;
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--text-dim);
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.contact-item .value {
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-mono);
}

/* 强化社交链接 */
.social-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    border-top: 2px solid var(--border-light);
    padding-top: 35px;
}

.social-links a {
    position: relative;
    color: #FFF;
    background-color: var(--secondary);
    text-decoration: none;
    font-size: 14px;
    font-family: var(--font-mono);
    font-weight: 900;
    padding: 12px 20px 12px 30px;
    transition: all 0.3s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    clip-path: polygon(0 0, 95% 0, 100% 50%, 95% 100%, 0 100%);
    overflow: hidden;
}

.social-links a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 8px;
    height: 100%;
    background-color: var(--accent); /* Hover 前：黄色 */
    transition: all 0.3s;
    z-index: 2;
}

.social-links a::after {
    content: '>>';
    font-size: 12px;
    opacity: 0.5;
}

.social-links a:hover {
    background-color: var(--accent);
    color: var(--secondary);
    transform: scale(1.02);
    box-shadow: 0 5px 15px var(--accent-glow);
}

/* Hover 时：竖条变为各自的品牌色 */
.social-links a:nth-child(1):hover::before { background-color: #24292e; } /* GitHub */
.social-links a:nth-child(2):hover::before { background-color: #fb7299; } /* Bilibili */
.social-links a:nth-child(3):hover::before { background-color: #0084ff; } /* Zhihu */

.sidebar-footer {
    margin-top: auto;
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--text-dim);
    display: flex;
    flex-direction: column;
    gap: 5px;
}

/* 主内容区 */
.main-content {
    flex-grow: 1;
    padding: 80px 100px;
    max-width: 1100px;
}

.content-section {
    margin-bottom: 120px;
    position: relative;
}

.section-num {
    font-family: var(--font-mono);
    font-size: 60px;
    font-weight: 900;
    line-height: 1;
    color: rgba(0,0,0,0.03);
    position: absolute;
    top: -30px;
    left: -50px;
    z-index: -1;
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    position: relative;
    padding-left: 20px;
}

.section-header::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 6px;
    height: 100%;
    background-color: var(--accent);
    box-shadow: 2px 0 10px var(--accent-glow);
}

.section-title {
    font-size: 30px;
    font-weight: 900;
    background-color: var(--secondary);
    color: #FFF;
    padding: 8px 30px;
    position: relative;
    clip-path: polygon(0 0, 100% 0, 95% 100%, 0 100%);
}

.section-title small {
    font-size: 14px;
    font-family: var(--font-mono);
    margin-left: 20px;
    opacity: 0.6;
    letter-spacing: 2px;
}

.section-body {
    padding-left: 30px;
    border-left: 2px solid var(--border-light);
}

/* 个人简介 */
.about-text {
    font-size: 18px;
    color: var(--text-main);
    max-width: 850px;
    line-height: 1.8;
}

/* 时间轴 */
.timeline-item {
    display: flex;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item .time {
    width: 140px;
    font-family: var(--font-mono);
    font-weight: 900;
    color: var(--secondary);
    font-size: 15px;
    position: relative;
}

.timeline-item .time::after {
    content: '';
    position: absolute;
    right: 20px;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

.timeline-item .info h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 8px;
}

.timeline-item .info p {
    color: var(--text-dim);
    font-size: 16px;
}

/* 奖项网格 */
.award-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.award-item {
    background-color: var(--bg-secondary);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
    clip-path: polygon(0 0, 100% 0, 100% 85%, 95% 100%, 0 100%);
    border-left: 5px solid transparent;
}

.award-item:hover {
    border-left-color: var(--accent);
    background-color: #FFF;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.award-item span {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-dim);
}

/* 研究方向列表 */
.tech-list li {
    margin-bottom: 25px;
    padding: 25px;
    background-color: var(--bg-secondary);
    position: relative;
    clip-path: polygon(2% 0, 100% 0, 100% 100%, 0 100%, 0 15%);
    transition: all 0.3s;
}

.tech-list li:hover {
    background-color: #FFF;
    box-shadow: 0 15px 30px rgba(0,0,0,0.08);
}

.tech-list li strong {
    font-size: 18px;
    display: block;
    margin-bottom: 10px;
    color: var(--secondary);
}

/* 游戏展示卡片 */
.game-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.game-card {
    background-color: var(--bg-secondary);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    clip-path: polygon(0 0, 100% 0, 100% 92%, 92% 100%, 0 100%);
    overflow: hidden;
}

.game-card::before {
    content: 'TECHNICAL_SPEC';
    position: absolute;
    top: 10px;
    right: 10px;
    font-family: var(--font-mono);
    font-size: 8px;
    color: rgba(0,0,0,0.2);
    z-index: 5;
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.game-card:hover img {
    transform: scale(1.05);
}

.game-card img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: transform 0.6s;
    filter: brightness(0.9);
}

.game-info {
    padding: 25px;
    background: #FFF;
    position: relative;
}

.game-info h3 {
    margin-bottom: 12px;
    font-size: 22px;
    font-weight: 900;
}

.btn-sm {
    display: inline-block;
    background-color: var(--accent);
    color: var(--secondary);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 10px 24px;
    font-weight: 900;
    transition: all 0.3s;
    clip-path: polygon(0 0, 85% 0, 100% 100%, 0 100%);
    animation: caution-slide 2s linear infinite;
    background-image: linear-gradient(
        -45deg, 
        var(--accent) 25%, 
        #fff44f 25%, 
        #fff44f 50%, 
        var(--accent) 50%, 
        var(--accent) 75%, 
        #fff44f 75%, 
        #fff44f
    );
    background-size: 40px 40px;
}

.btn-sm:hover {
    filter: brightness(1.1);
    letter-spacing: 1px;
}

/* 页脚联系方式 */
.contact-footer {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
}

.contact-box {
    padding: 25px;
    background: var(--bg-secondary);
    clip-path: polygon(0 0, 95% 0, 100% 20%, 100% 100%, 0 100%);
}

.contact-box strong {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--secondary);
    display: block;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 5px;
    width: fit-content;
}

/* 响应式适配 */
@media (max-width: 1200px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 60px 40px;
        clip-path: none;
    }
    .main-content {
        padding: 60px 40px;
    }
}

@media (max-width: 768px) {
    .game-grid {
        grid-template-columns: 1fr;
    }
    .contact-footer {
        grid-template-columns: 1fr;
    }
    .section-num {
        font-size: 40px;
        left: -20px;
    }
}