/* ========== 基础变量与重置 ========== */
:root {
    --cream: #FAF8F5;
    --warm-gray: #E8E4DF;
    --text-primary: #3D3A36;
    --text-secondary: #7A756E;
    --text-light: #A9A49D;
    --mint: #7BC4AD;
    --mint-light: #D4EDE5;
    --mint-dark: #5AAE95;
    --mint-glow: rgba(168, 216, 200, 0.2);
    --pink: #E8A5A5;
    --pink-light: #FBE4E4;
    --pink-dark: #D48585;
    --card-bg: rgba(255, 255, 255, 0.82);
    --shadow-sm: 0 2px 10px rgba(61, 58, 54, 0.05);
    --shadow-md: 0 4px 24px rgba(61, 58, 54, 0.07);
    --shadow-lg: 0 8px 44px rgba(61, 58, 54, 0.1);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--text-primary);
    background: var(--cream);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ========== 导航栏 ========== */
/* ========== 进度条 ========== */
#progressBar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--mint), var(--pink));
    z-index: 1001;
    transition: width 0.1s linear;
    border-radius: 0 2px 2px 0;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    height: 64px;
    background: rgba(250, 248, 245, 0.82);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(232, 228, 223, 0.5);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-logo {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--mint-dark);
    background: var(--mint-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== 通用区块 ========== */
.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 5% 60px;
}

.content-section {
    padding-top: 80px;
    min-height: auto;
}

.alt-bg {
    background: var(--warm-gray);
}

.section-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}

/* ========== 首页 ========== */
.hero-section {
    background: linear-gradient(180deg, var(--cream) 0%, var(--warm-gray) 100%);
    position: relative;
    overflow: hidden;
}

.hero-bg-decoration {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--mint-light) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.5;
    animation: floatSlow 8s ease-in-out infinite;
}

.hero-bg-decoration::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--pink-light) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.4;
    animation: floatSlow 10s ease-in-out infinite reverse;
}

@keyframes floatSlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20px, -20px); }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 10;
    max-width: 600px;
}

.avatar-wrapper {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto 30px;
}

.avatar-ring {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 2px solid var(--mint);
    border-top-color: var(--pink-dark);
    animation: ringRotate 4s linear infinite;
}

@keyframes ringRotate {
    to { transform: rotate(360deg); }
}

.avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid white;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.avatar-img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.hero-name {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero-bio {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 28px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.6s;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.8s;
}

.tag {
    display: inline-block;
    padding: 6px 16px;
    background: white;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.scroll-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.85rem;
    transition: var(--transition);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 1s;
}

.scroll-btn:hover {
    color: var(--mint-dark);
    transform: translateY(4px);
}

.scroll-btn svg {
    animation: bounceDown 2s ease-in-out infinite;
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

/* ========== 卡片样式 ========== */
.card-grid {
    display: grid;
    gap: 24px;
}

.card-grid.single {
    grid-template-columns: 1fr;
}

.info-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.info-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.info-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--mint-light);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.card-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.card-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-green {
    background: var(--mint-light);
    color: #4A9E82;
}

.badge-pink {
    background: var(--pink-light);
    color: #C47A7A;
}

.card-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========== 论文卡片 ========== */
.paper-card {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: linear-gradient(135deg, var(--mint-light) 0%, var(--pink-light) 100%);
    border-radius: var(--radius-md);
    align-items: flex-start;
}

.paper-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.paper-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.paper-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========== 时间线 ========== */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--mint), var(--pink));
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: 20px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -26px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--mint);
    border: 3px solid var(--card-bg);
    box-shadow: 0 0 0 2px var(--mint);
}

.timeline-content h4 {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-sub {
    font-size: 0.85rem;
    color: var(--mint-dark);
    margin-bottom: 10px;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========== 相册 ========== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    aspect-ratio: 1;
    opacity: 0;
    transform: translateY(30px);
}

.gallery-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.gallery-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(61, 58, 54, 0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: var(--radius-md);
}

.gallery-item:hover .gallery-overlay {
    background: rgba(61, 58, 54, 0.15);
}

.gallery-overlay span {
    font-size: 2rem;
    opacity: 0;
    transform: scale(0.5);
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay span {
    opacity: 1;
    transform: scale(1);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 50px 5% 30px;
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--mint);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--mint-dark);
}

.footer-links span {
    font-size: 0.9rem;
    color: var(--text-light);
}

.footer-divider {
    color: var(--text-light);
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-light);
}

.tech-support {
    font-size: 0.85rem !important;
    color: var(--text-muted) !important;
    margin-top: 10px;
}

.tech-support a {
    color: var(--mint);
    transition: color 0.3s;
}

.tech-support a:hover {
    color: var(--mint-dark);
    text-decoration: underline;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(250, 248, 245, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--warm-gray);
        transform: translateY(-120%);
        transition: var(--transition);
    }

    .nav-links.open {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-name {
        font-size: 2.2rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .info-card {
        padding: 24px;
    }

    .paper-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .hero-tags {
        gap: 8px;
    }

    .tag {
        font-size: 0.8rem;
        padding: 5px 12px;
    }
}