:root {
    --bg-pink: #FEECEF;
    --main-pink: #E58B9D;
    --dark-pink: #F6B5C0;
    --white: #FFFFFF;
    --text-gray: #555;
    --text-light: #888;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body { 
    font-family: 'Montserrat', 'Noto Sans TC', sans-serif;
    color: var(--text-gray);
    line-height: 1.8;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container { max-width: 1000px; margin: 0 auto; padding: 40px 20px 100px 20px; }

/* 頁面標題 */
.page-title {
    text-align: center;
    margin-bottom: 60px;
    margin-top: 40px;
}
.page-title h1 {
    font-size: 3rem;
    color: var(--main-pink);
    font-family: 'Montserrat', sans-serif;
}
.page-title .subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 18px;
}

/* ORCID 按鈕樣式 */
.orcid-wrapper {
    margin-bottom: 22px;
    display: flex;
    justify-content: center;
}

.orcid-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: #ffffff;
    border: 1.5px solid var(--dark-pink);
    border-radius: 30px;
    color: var(--text-gray);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(229, 139, 157, 0.12);
    transition: all 0.3s ease;
}

.orcid-btn:hover {
    background-color: var(--bg-pink);
    border-color: var(--main-pink);
    color: var(--main-pink);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(229, 139, 157, 0.22);
}

.orcid-btn .orcid-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.orcid-btn .external-icon {
    width: 15px;
    height: 15px;
    margin-left: 2px;
    opacity: 0.6;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.orcid-btn:hover .external-icon {
    opacity: 1;
    transform: translate(2px, -2px);
}

.divider {
    width: 60px;
    height: 3px;
    background-color: var(--dark-pink);
    margin: 0 auto;
    border-radius: 2px;
}

/* 區塊通用樣式 */
section { margin-bottom: 80px; }

.section-title {
    margin-bottom: 30px;
    border-left: 5px solid var(--main-pink);
    padding-left: 15px;
    width: 100%;
    text-align: left;
}
.section-title h2 {
    font-size: 1.8rem;
    color: var(--text-gray);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 15px;
}
.section-title span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-light);
}

/* 研究方向 */
.research-intro {
    background: var(--bg-pink);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.02);
}
.intro-zh { font-size: 1.05rem; margin-bottom: 15px; text-align: justify; }
.intro-en { font-size: 0.9rem; color: #777; font-style: italic; }

/* 研究標籤 */
.research-tags {
    margin-top: 20px;
    font-weight: 700;
    color: var(--main-pink);
    font-size: 1.05rem;
}

/* 論文列表 */
/* 新增：分類區塊與小標題樣式 */
.category-section {
    margin-bottom: 50px;
    width: 100%;
}
.sub-category-title {
    font-size: 1.3rem;
    color: var(--main-pink);
    margin-bottom: 20px;
    font-family: 'Montserrat', 'Noto Sans TC', sans-serif;
    font-weight: 700;
    border-bottom: 2px dashed var(--bg-pink);
    padding-bottom: 10px;
}

.card-list { display: flex; flex-direction: column; gap: 30px; width: 100%; }
.research-card {
    background: #fff;
    border: 1.5px solid var(--bg-pink);
    border-radius: 15px;
    padding: 40px;
    width: 100%;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    box-shadow: 0 4px 10px rgba(0,0,0,0.02);
}
.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(229, 139, 157, 0.15);
    border-color: var(--main-pink);
}
.card-content h3 { color: #000000; margin-bottom: 8px; font-size: 1.3rem; }
.publish-info { font-size: 0.85rem; color: var(--text-light); margin-bottom: 15px; font-weight: bold; }
.abstract { font-size: 0.95rem; margin-bottom: 15px; }
.read-more { 
    color: var(--main-pink); 
    font-weight: 600; 
    text-decoration: none; 
    font-size: 0.9rem;
}
.read-more:hover { text-decoration: underline; }

/* 研討會網格 */
.conference-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.conf-item {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.conf-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.conf-info { padding: 20px; }
.conf-info h4 { font-size: 1.1rem; color: var(--text-gray); margin-bottom: 5px; }
.conf-info span { font-size: 0.85rem; color: var(--main-pink); }

/* 動畫效果 */
.animate-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.animate-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* 回到頂部按鈕 */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background-color: var(--main-pink);
    color: white;
    border: none;
    border-radius: 50%;
    width: 55px;
    height: 55px;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(229, 139, 157, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background-color: #d17586; transform: translateY(-5px); }

/* =========================================
   左側漂浮目錄 (Floating TOC - 超輕量半透明不遮擋設計)
   ========================================= */
.floating-toc {
    position: fixed;
    left: max(10px, calc((100vw - 1040px) / 2 - 110px));
    top: 50%;
    transform: translateY(-50%) translateX(-15px);
    background: rgba(255, 255, 255, 0.48); /* 高透光度毛玻璃，絕不遮擋底層資訊 */
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 12px 14px;
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(229, 139, 157, 0.12), 0 1px 3px rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(254, 236, 239, 0.85);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0.3s ease, background 0.3s ease;
    max-width: 105px;
}

.floating-toc:hover {
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 8px 24px rgba(229, 139, 157, 0.18);
}

.floating-toc.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0); /* 滑動時向右滑入顯示 */
}

.floating-toc ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
    padding: 0;
}

.floating-toc a {
    color: var(--text-gray);
    text-decoration: none;
    position: relative;
    padding-left: 9px;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.floating-toc .toc-zh {
    font-size: 0.8rem;
    font-weight: 700;
    color: #444;
    transition: color 0.25s ease;
}

.floating-toc .toc-en {
    font-size: 0.62rem;
    font-weight: 500;
    color: #888;
    letter-spacing: 0.2px;
    transition: color 0.25s ease;
}

.floating-toc a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: var(--main-pink);
    transform: scale(0);
    transition: transform 0.25s ease, background-color 0.25s ease;
}

.floating-toc a:hover .toc-zh,
.floating-toc a:hover .toc-en {
    color: var(--main-pink);
}

.floating-toc a.active .toc-zh {
    color: var(--main-pink);
    font-weight: 800;
}

.floating-toc a.active .toc-en {
    color: var(--main-pink);
    opacity: 0.9;
}

.floating-toc a.active::before,
.floating-toc a:hover::before {
    transform: scale(1.3);
}

@media (max-width: 1240px) {
    .floating-toc {
        left: 8px;
        padding: 10px 12px;
        background: rgba(255, 255, 255, 0.42);
        backdrop-filter: blur(16px);
    }
}

@media (max-width: 1060px) {
    .floating-toc {
        display: none !important;
    }
}