/* =========================================
   about.css - 关于我页面 (全设备适配 + 圆形肖像版)
   ========================================= */

.about-page-wrapper { padding: clamp(100px, 18vh, 180px) 5vw clamp(60px, 10vh, 100px); max-width: 1600px; margin: 0 auto; }

.about-grid { display: grid; grid-template-columns: 3fr 7fr; gap: clamp(40px, 8vw, 80px); align-items: start; }

.about-sidebar { position: sticky; top: clamp(100px, 15vh, 150px); display: flex; flex-direction: column; gap: clamp(25px, 4vw, 40px); }
.sidebar-block span { display: block; font-family: var(--font-sans); font-size: 10px; text-transform: uppercase; letter-spacing: 0.2em; opacity: 0.4; margin-bottom: 10px; color: var(--fg-color); }
.sidebar-link { font-family: var(--font-serif); font-size: clamp(1rem, 1.5vw, 1.5rem); color: var(--fg-color); transition: opacity 0.3s; display: inline-block; border-bottom: 1px solid transparent; word-break: break-all; }
.sidebar-link:hover { opacity: 0.5; border-bottom: 1px solid var(--fg-color); }

.manifesto { font-family: var(--font-serif); font-size: clamp(1.5rem, 3.5vw, 4rem); line-height: 1.3; font-weight: 400; margin-bottom: clamp(30px, 6vw, 60px); color: var(--fg-color); }
.bio-text { font-size: clamp(0.9rem, 1.1vw, 1.2rem); font-weight: 300; line-height: 1.8; color: rgba(0,0,0,0.7); margin-bottom: 30px; max-width: 800px; }

.resume-section { margin-top: clamp(50px, 10vw, 100px); border-top: 1px solid var(--line-color); padding-top: clamp(30px, 5vw, 50px); }
.section-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.2em; margin-bottom: 30px; color: var(--fg-color); opacity: 0.5; }

.resume-item { display: grid; grid-template-columns: 1fr 3fr; gap: clamp(15px, 4vw, 40px); margin-bottom: 30px; padding-bottom: 30px; border-bottom: 1px solid rgba(0,0,0,0.05); }
.resume-date { font-size: 11px; opacity: 0.6; letter-spacing: 0.1em; color: var(--fg-color); }
.resume-content h4 { font-family: var(--font-serif); font-size: clamp(1.1rem, 1.5vw, 1.5rem); font-weight: 400; margin-bottom: 8px; color: var(--fg-color); }
.resume-content p { font-size: clamp(0.85rem, 0.9vw, 0.9rem); color: rgba(0,0,0,0.6); font-weight: 300; line-height: 1.6; }

.skills-container { display: flex; flex-direction: column; gap: 25px; }
.skill-category h5 { font-size: 10px; text-transform: uppercase; letter-spacing: 0.1em; opacity: 0.5; margin-bottom: 12px; color: var(--fg-color); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag { padding: 6px 14px; border: 1px solid rgba(0,0,0,0.15); border-radius: 50px; font-size: clamp(10px, 1vw, 11px); letter-spacing: 0.05em; transition: all 0.4s var(--ease-out-expo); color: var(--fg-color); }
@media (hover: hover) { .skill-tag:hover { background-color: var(--fg-color); color: var(--bg-color); border-color: var(--fg-color); transform: translateY(-2px); } }

.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 1s var(--ease-out-expo), transform 1s var(--ease-out-expo); }
.fade-up.is-visible { opacity: 1; transform: translateY(0); }

/* --- 🌟 肖像照片样式 (圆形版) --- */
.profile-photo-container {
    width: clamp(100px, 10vw, 130px); 
    aspect-ratio: 1 / 1;              /* 🌟 强制正方形 */
    border-radius: 50%;               /* 🌟 切成圆形 */
    overflow: hidden;
    margin-bottom: 20px;              
    background-color: rgba(0,0,0,0.05); 
    border: 1px solid var(--line-color); /* 给圆形加一个极细的边缘线 */
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover; 
    display: block;
    filter: grayscale(30%) contrast(1.05);
    transform: scale(1.02);
    transition: filter 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

@media (hover: hover) {
    .profile-photo-container:hover .profile-photo {
        filter: grayscale(0%) contrast(1.05);
        transform: scale(1.1); /* 圆形下的拉近效果更明显一点 */
    }
}

/* 🌟 设备适配 */
@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-sidebar { position: relative; top: 0; flex-direction: row; flex-wrap: wrap; gap: 20px; justify-content: flex-start; border-bottom: 1px solid var(--line-color); padding-bottom: 25px; }
    .sidebar-block { flex: 1 1 calc(50% - 20px); min-width: 140px; }
    .resume-item { grid-template-columns: 1fr; gap: 8px; padding-bottom: 25px; margin-bottom: 25px; }
    .resume-date { margin-bottom: 2px; }
    
    .profile-photo-container {
        width: 100px; 
        margin-bottom: 0; 
    }
}
@media (max-width: 480px) {
    .sidebar-block { flex: 1 1 100%; }
}