/* ============================================
   统一设计规范 - 字号/行高/圆角/内边距
   ============================================ */

:root {
    /* 字号层级（统一，解决忽大忽小） */
    --font-size-hero: 2rem;          /* 32px 页面大标题 */
    --font-size-title: 1.75rem;      /* 28px 页面二级标题 */
    --font-size-section: 1.375rem;   /* 22px 模块标题 */
    --font-size-card-title: 1.125rem;/* 18px 卡片标题 */
    --font-size-body: 0.875rem;      /* 14px 正文内容 */
    --font-size-small: 0.75rem;      /* 12px 辅助文字 */
    --font-size-button: 0.875rem;    /* 14px 按钮文字 */

    /* 行高统一 1.6 */
    --line-height-tight: 1.2;
    --line-height-normal: 1.4;
    --line-height-unified: 1.6;
    --line-height-body: 1.6;
    --line-height-loose: 1.8;

    /* 字重 */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* 字体家族 */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;

    /* 统一卡片规范 */
    --card-radius: 12px;
    --card-padding: 1.5rem;          /* 24px */
    --section-gap: 2rem;             /* 32px 模块间距 */
    --card-shadow: 0 2px 8px rgba(147,112,219,0.15);
    --card-hover-shadow: 0 8px 24px rgba(147,112,219,0.22);

    /* 可访问性增强 */
    --focus-ring-color: rgba(236,72,153,0.6);
    --focus-ring-width: 3px;
    --touch-target-min: 44px;
}

/* ============================================
   可访问性增强 (Accessibility - Priority 1)
   ============================================ */

/* Skip-links - 跳转到主要内容 */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    z-index: 9999;
    text-decoration: none;
    font-weight: 600;
    transition: top 0.2s ease-out;
}
.skip-link:focus {
    top: 10px;
    outline: none;
    box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

/* Focus-states - 可见焦点环 */
*:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 6px rgba(236,72,153,0.15);
}

/* 段落间距统一 */
p + p {
    margin-top: 0.75rem; /* 12px */
}

/* ============================================
   触摸交互增强 (Touch & Interaction - Priority 2)
   ============================================ */

/* cursor-pointer - 所有可点击元素 */
button,
.btn,
.btn-primary,
.btn-secondary,
.btn-outline,
.nav-link,
.access-card,
.card,
.skill-tag,
.hobby-item,
.gallery-item,
.contact-item,
.timeline-content,
a[href],
[role="button"],
input[type="submit"],
input[type="button"] {
    cursor: pointer;
}

/* 确保 touch target 最小尺寸 */
@media (pointer: coarse) {
    .nav-link,
    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-outline,
    .skill-tag,
    .tag,
    .hobby-item,
    .contact-item i,
    .gallery-item,
    .access-card,
    .card,
    .version-switch-link,
    .theme-toggle,
    .user-avatar,
    .close-notification,
    .hobby-item,
    .timeline-content,
    a[href],
    [role="button"] {
        min-height: var(--touch-target-min);
        min-width: var(--touch-target-min);
    }
}

/* 触控点击反馈 - 全局 active 状态 */
@media (pointer: coarse) {
    .btn:active,
    .btn-primary:active,
    .btn-secondary:active,
    .btn-outline:active,
    .nav-link:active,
    .access-card:active,
    .card:active,
    .skill-tag:active,
    .tag:active,
    .hobby-item:active,
    .gallery-item:active,
    .version-switch-link:active,
    .timeline-content:active,
    a[href]:active,
    [role="button"]:active {
        transform: scale(0.96);
        opacity: 0.85;
        transition-duration: 0.1s;
    }

    .theme-toggle:active {
        transform: scale(0.92);
        transition-duration: 0.1s;
    }
}

/* 统一交互动效 mixin */
.interactive {
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
}
.interactive:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
}
.interactive:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}

/* ============================================
   Reduced Motion 支持 (Animation - Priority 7)
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .interactive:hover,
    .card:hover,
    .access-card:hover,
    .gallery-item:hover {
        transform: none;
    }

    .gradient-text {
        animation: none;
    }
}

/* 响应式字体调整 */
@media (max-width: 1024px) {
    :root {
        --font-size-hero: 1.75rem;
        --font-size-title: 1.375rem;
        --font-size-section: 1.25rem;
        --font-size-card-title: 1rem;
    }
}
@media (max-width: 640px) {
    :root {
        --font-size-hero: 1.5rem;
        --font-size-title: 1.25rem;
        --font-size-section: 1.125rem;
        --font-size-card-title: 0.9375rem;
        --font-size-body: 0.8125rem;
        --font-size-small: 0.6875rem;
    }
}

/* ============================================
   首页 Hero 区域
   ============================================ */
.hero-section {
    background: transparent;
    padding: 3rem 0 4rem;
    margin-bottom: 3rem;
    position: relative;
}
.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 4rem;
}
.hero-text { flex: 1; }
.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 0.8rem;
    letter-spacing: -0.03em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 8px rgba(236,72,153,0.15));
}
.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 600;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.2rem;
    letter-spacing: 0.01em;
}
.hero-description {
    font-size: 1.02rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 540px;
}
.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.hero-actions .btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}
.hero-actions .btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,105,180,0.3) 0%, rgba(168,85,247,0.3) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.hero-actions .btn:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: var(--shadow-neon);
}
.hero-actions .btn:hover::after {
    opacity: 1;
}
.hero-actions .btn:active {
    transform: translateY(0) scale(0.98);
}
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}
.profile-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 28px;
    padding: 2.2rem 1.8rem 2rem;
    box-shadow: var(--shadow-xl);
    text-align: center;
    width: 360px;
    border: 1px solid rgba(251,207,232,0.6);
    position: relative;
    transition: all 0.3s ease;
}
.profile-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 30px;
    background: var(--gradient-neon);
    z-index: -1;
    opacity: 0.5;
    transition: opacity 0.4s ease;
}
.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}
.profile-card:hover::before {
    opacity: 0.9;
}
.avatar-ring {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.2rem;
    border-radius: 50%;
    padding: 4px;
    background: var(--gradient-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.avatar-ring:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-neon);
}
.profile-avatar {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    border: 3px solid white;
    box-shadow: 0 4px 15px var(--shadow-color);
}
.profile-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 1.2rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.02em;
}
.info-list {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    text-align: left;
}
.info-row {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 0.8rem;
    border-radius: 12px;
    background: rgba(252,231,243,0.5);
    font-size: 0.92rem;
    line-height: 1.5;
    transition: all 0.2s ease;
}
.info-row:hover {
    background: rgba(255,255,255,0.8);
    box-shadow: 0 2px 8px rgba(236,72,153,0.1);
    transform: translateX(4px);
}
.info-row i {
    color: var(--color-primary-500);
    width: 18px;
    text-align: center;
    font-size: 0.95rem;
    flex-shrink: 0;
}
.info-label {
    color: var(--text-tertiary);
    font-weight: 500;
    min-width: 2.5em;
    flex-shrink: 0;
}
.info-value {
    color: var(--text-primary);
    font-weight: 400;
    word-break: break-all;
}

/* ============================================
   快速访问
   ============================================ */
.quick-access {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.access-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.access-card {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.access-card:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--color-primary-400);
}
.access-card:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.access-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--gradient-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.3rem;
    color: white;
    transition: transform 0.2s ease-out;
}
.access-card:hover .access-icon {
    transform: scale(1.1) rotate(-5deg);
}
.access-card h3 {
    font-size: var(--font-size-card-title);
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.5rem;
}
.access-card p {
    font-size: var(--font-size-body);
    color: var(--text-secondary);
    line-height: var(--line-height-unified);
}

/* ============================================
   关于我
   ============================================ */
.about-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.about-content {
    display: flex;
    gap: 3rem;
    align-items: center;
}
.about-text { flex: 1; }
.about-text p {
    font-size: var(--font-size-body);
    line-height: var(--line-height-unified);
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    flex-shrink: 0;
}
.stat-item {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
}
.stat-item:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
}
.stat-item:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.stat-number {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label {
    font-size: var(--font-size-body);
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

/* ============================================
   教育经历
   ============================================ */
.education-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.timeline {
    position: relative;
    padding-left: 2rem;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: 2px;
    background: var(--gradient-primary);
    opacity: 0.4;
}
.timeline-item {
    position: relative;
    margin-bottom: var(--section-gap);
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.35rem;
    top: 0.4rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 3px solid var(--color-primary-500);
    box-shadow: 0 0 0 4px rgba(255,105,180,0.12);
}
.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.timeline-content:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--border-accent);
}
.timeline-content:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.timeline-content h3 {
    font-size: var(--font-size-card-title);
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}
.timeline-date {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}
.timeline-content p {
    font-size: var(--font-size-body);
    color: var(--text-secondary);
    line-height: var(--line-height-unified);
}

/* ============================================
   工作经历 — 主次分明布局
   ============================================ */
.experience-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}

/* 主卡片：豆沙包科技 — 居中、渐变背景 */
.exp-main-card {
    background: linear-gradient(135deg, rgba(252,231,243,0.9) 0%, rgba(233,213,255,0.9) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(236,72,153,0.25);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    max-width: 800px;
    margin: 0 auto var(--section-gap);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
}
.exp-main-card:hover {
    transform: scale(1.02);
    box-shadow: var(--card-hover-shadow);
}
.exp-main-card:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.exp-main-card .experience-header h3 {
    font-size: 1.25rem;
}
.exp-main-card .experience-role {
    font-size: var(--font-size-section);
    font-weight: 700;
}
.exp-focus-card {
    max-width: 1000px;
    padding: 2rem;
    border-width: 2px;
}
.exp-focus-card .experience-header h3 {
    font-size: 1.5rem;
}
.exp-focus-card .experience-role {
    font-size: 1.5rem;
}
.version-switch-link {
    background: var(--gradient-primary);
    color: var(--text-inverse) !important;
    border-radius: 999px;
    box-shadow: 0 6px 18px rgba(236,72,153,0.22);
}
.version-switch-link:hover {
    color: var(--text-inverse) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-neon);
}

/* 其他工作经历 — 等宽小卡片，错落排列 */
.exp-others-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--section-gap);
}
.exp-others-grid .exp-sub-card:nth-child(3) {
    grid-column: 1;
}

.exp-sub-card {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.exp-sub-card:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--border-accent);
}
.exp-sub-card:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}

/* 工作经历卡片统一头部 */
.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.25rem;
    gap: 0.8rem;
}
.experience-header h3 {
    font-size: var(--font-size-card-title);
    font-weight: 700;
    color: var(--text-primary);
}
.experience-date {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    white-space: nowrap;
}
.experience-role {
    font-size: var(--font-size-body);
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

/* 统一列表样式 */
.experience-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.experience-list li {
    font-size: var(--font-size-body);
    color: var(--text-secondary);
    line-height: var(--line-height-unified);
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}
.experience-list li::before {
    content: '\f054';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 0.6rem;
    position: absolute;
    left: 0;
    top: 0.35rem;
    color: var(--color-primary-400);
}
.experience-list li strong {
    color: var(--color-primary-600);
    font-weight: 600;
}
.experience-list li.hidden-item {
    display: none;
}
.experience-list.expanded li.hidden-item {
    display: list-item;
}
.experience-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.6rem;
    padding: 0.3rem 0.8rem;
    font-size: var(--font-size-small);
    color: var(--color-primary-600);
    background: none;
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.experience-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-accent);
}
.experience-toggle i {
    font-size: 0.6rem;
    transition: transform 0.2s ease;
}
.experience-toggle.active i {
    transform: rotate(180deg);
}

/* ============================================
   校园项目经历 — 独立模块
   ============================================ */
.campus-projects-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.section-divider {
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, rgba(249,168,212,0.5) 30%, rgba(168,85,247,0.5) 70%, transparent 100%);
    margin: 0 auto var(--section-gap);
    max-width: 600px;
    border-radius: 1px;
}
.campus-projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--section-gap);
}
.campus-project-card {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.campus-project-card:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--border-accent);
}
.campus-project-card:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}

/* ============================================
   技能展示
   ============================================ */
.skills-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--section-gap);
}
.skill-category {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.skill-category:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--border-accent);
}
.skill-category:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.skill-category h3 {
    font-size: var(--font-size-card-title);
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.skill-category h3 i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.skill-tag {
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: var(--font-size-body);
    background: rgba(252,231,243,0.5);
    color: var(--text-secondary);
    border: 1px solid rgba(236,72,153,0.15);
    transition: all 0.2s ease-out;
    cursor: default;
}
.skill-tag:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: scale(1.05);
    box-shadow: 0 2px 10px rgba(236,72,153,0.2);
}

/* ============================================
   兴趣爱好
   ============================================ */
.hobbies-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
    text-align: center;
}
.hobbies-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--section-gap);
}
.hobby-item {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding) 1rem;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.hobby-item:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--color-primary-400);
}
.hobby-item:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.hobby-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--gradient-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.8rem;
    font-size: 1.3rem;
    color: white;
    transition: transform 0.2s ease-out;
}
.hobby-item:hover .hobby-icon {
    transform: scale(1.12);
}
.hobby-item h3 {
    font-size: var(--font-size-body);
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   自我评价
   ============================================ */
.self-eval-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
    text-align: center;
}
.self-eval-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--section-gap);
}
.self-eval-card {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    text-align: left;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out;
}
.self-eval-card:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--border-accent);
}
.self-eval-card:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.self-eval-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}
.self-eval-header i {
    font-size: 1.3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.self-eval-header h3 {
    font-size: var(--font-size-card-title);
    font-weight: 700;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.self-eval-card p {
    font-size: var(--font-size-body);
    line-height: var(--line-height-unified);
    color: var(--text-secondary);
}

/* ============================================
   照片墙
   ============================================ */
.gallery-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
/* 照片墙分类 */
.gallery-category {
    margin-bottom: 2rem;
}
.gallery-category:last-child {
    margin-bottom: 0;
}
.gallery-category-title {
    font-size: var(--font-size-section);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.gallery-category-title i {
    color: var(--color-primary-500);
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
.gallery-grid-life {
    grid-template-columns: repeat(4, 1fr);
}
.gallery-grid-photo {
    grid-template-columns: repeat(4, 1fr);
}
.gallery-item {
    border-radius: var(--card-radius);
    overflow: hidden;
    aspect-ratio: 1/1 !important; /* 统一正方形 */
    box-shadow: var(--card-shadow);
    position: relative;
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
    cursor: pointer;
}
.gallery-item::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 14px;
    background: var(--gradient-neon);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}
.gallery-item:hover::before {
    opacity: 0.5;
}
.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: var(--card-hover-shadow);
}
.gallery-item:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.gallery-item:nth-child(4n) {
    aspect-ratio: 1/1 !important; /* 保持统一 */
}
.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.2s ease-out;
}
.gallery-item:hover img {
    transform: scale(1.04);
}

/* 响应式照片墙 */
@media (max-width: 1024px) {
    .gallery-grid,
    .gallery-grid-life,
    .gallery-grid-photo {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 640px) {
    .gallery-grid,
    .gallery-grid-life,
    .gallery-grid-photo {
        grid-template-columns: repeat(2, 1fr);
    }
    .gallery-category-title {
        font-size: var(--font-size-card-title);
    }
}

/* 照片弹窗 */
.photo-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
.photo-modal.show {
    display: flex;
}
.photo-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.2s;
}
.photo-modal-close:hover {
    opacity: 1;
}
.photo-modal-img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
}

/* ============================================
   聊天互动
   ============================================ */
.chat-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.chat-messages {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-primary);
    border-radius: var(--card-radius);
    min-height: 200px;
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
}

/* ============================================
   最新动向
   ============================================ */
.posts-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}

/* ============================================
   联系我
   ============================================ */
.contact-section {
    max-width: 1200px;
    margin: 0 auto var(--section-gap);
    padding: 0 1.5rem;
}
.contact-content {
    display: flex;
    gap: 3rem;
}
.contact-info { flex: 1; }
.contact-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    padding: 0.5rem;
    border-radius: var(--card-radius);
    transition: transform 0.2s ease-out, background 0.2s ease-out;
}
.contact-item:hover {
    transform: scale(1.02);
    background: rgba(255,255,255,0.4);
}
.contact-item:active {
    transform: scale(0.98);
    transition-duration: 0.1s;
}
.contact-item i {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--gradient-neon);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
}
.contact-item:hover i {
    box-shadow: var(--shadow-neon);
    transform: scale(1.08);
}
.contact-item h4 {
    font-size: var(--font-size-card-title);
    font-weight: 700;
    margin-bottom: 0.2rem;
}
.contact-item p {
    font-size: var(--font-size-body);
    color: var(--text-secondary);
}
.contact-message { flex: 1; }
.contact-message h3 {
    font-size: var(--font-size-section);
    font-weight: 700;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.4rem;
}
.contact-message > p {
    font-size: var(--font-size-body);
    color: var(--text-secondary);
    margin-bottom: 1rem;
}
.message-form {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.message-form input,
.message-form textarea {
    padding: 0.8rem 1rem;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-primary);
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-primary);
    font-size: var(--font-size-body);
    font-family: inherit;
    transition: all 0.2s ease-out;
}
.message-form input:focus,
.message-form textarea:focus {
    outline: none;
    border-color: var(--border-accent);
    box-shadow: 0 0 0 3px rgba(168,85,247,0.1);
    background: rgba(255,255,255,0.9);
}
.message-form textarea {
    min-height: 100px;
    resize: vertical;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: rgba(255,255,255,0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-primary);
    padding: 2.5rem 0;
    margin-top: 2rem;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    text-align: center;
}
.footer-logo {
    font-size: var(--font-size-section);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.footer-logo i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-description {
    font-size: var(--font-size-body);
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}
.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-body);
    transition: color 0.2s ease-out;
    padding: 0.3rem 0;
    border-radius: 6px;
}
.footer-links a:hover {
    color: var(--color-primary-500);
    transform: scale(1.03);
}
.footer-copyright {
    font-size: var(--font-size-small);
    color: var(--text-muted);
}

/* ============================================
   基础重置和全局样式
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Profile Card */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.profile-card { background: rgba(255,255,255,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 28px; padding: 2.2rem 1.8rem 2rem; box-shadow: 0 8px 30px rgba(236,72,153,0.12); text-align: center; width: 360px; border: 1px solid rgba(251,207,232,0.6); position: relative; }
.profile-card::before { content: ''; position: absolute; inset: -2px; border-radius: 30px; background: linear-gradient(135deg, #ff69b4, #ec4899, #a855f7, #9370db); z-index: -1; opacity: 0.5; transition: opacity 0.4s ease; }
.profile-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(236,72,153,0.2); }
.profile-card:hover::before { opacity: 0.9; }
.avatar-ring { width: 120px; height: 120px; margin: 0 auto 1.2rem; border-radius: 50%; padding: 4px; background: linear-gradient(135deg, #ff69b4, #ec4899, #a855f7, #9370db); display: flex; align-items: center; justify-content: center; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.avatar-ring:hover { transform: scale(1.05); box-shadow: 0 0 20px rgba(255,105,180,0.3); }
.profile-avatar { width: 110px; height: 110px; border-radius: 50%; object-fit: cover; display: block; border: 3px solid white; box-shadow: 0 4px 15px rgba(236,72,153,0.1); }
.profile-info h3 { font-size: 1.2rem; font-weight: 700; margin: 0 0 1.2rem; background: linear-gradient(135deg, #f9a8d4, #ec4899); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.info-list { display: flex; flex-direction: column; gap: 0.7rem; text-align: left; }
.info-row { display: flex; align-items: center; gap: 0.7rem; padding: 0.6rem 0.8rem; border-radius: 12px; background: rgba(252,231,243,0.5); font-size: 0.92rem; line-height: 1.5; transition: all 0.2s ease; }
.info-row:hover { background: rgba(255,255,255,0.8); box-shadow: 0 2px 8px rgba(236,72,153,0.1); transform: translateX(4px); }
.info-row i { color: #ec4899; width: 18px; text-align: center; font-size: 0.95rem; flex-shrink: 0; }
.info-label { color: #f9a8d4; font-weight: 500; min-width: 2.5em; flex-shrink: 0; }
.info-value { color: #4a0e2e; font-weight: 400; word-break: break-all; }

body {
    font-family: var(--font-family-primary);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-body);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   字体层级系统
   ============================================ */
.page-title {
    font-size: var(--font-size-title);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: var(--font-size-subtitle);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.card-title {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    margin-bottom: 0.75rem;
}

.content-text {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-body);
    margin-bottom: 1rem;
}

.helper-text {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    opacity: 0.8;
}

.caption-text {
    font-size: var(--font-size-caption);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    opacity: 0.7;
}

.button-text {
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    letter-spacing: 0.01em;
}

/* ============================================
   渐变文字效果
   ============================================ */
.gradient-text {
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    background-size: 200% auto;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ============================================
   布局容器
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.main-content {
    padding-top: 80px;
    min-height: calc(100vh - 200px);
}

/* ============================================
   导航栏样式
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-size-subtitle);
    font-weight: var(--font-weight-bold);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
}

.nav-link.active {
    font-weight: var(--font-weight-semibold);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
    align-self: center;
}

/* ============================================
   主题切换按钮
   ============================================ */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 40px;
    padding: 0 1rem;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    line-height: 1;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50px;
    z-index: -1;
    transition: all 0.3s ease;
}

.theme-toggle:hover::before {
    transform: scale(1.05);
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    z-index: -1;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:hover::before {
    transform: scale(1.05);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    color: white;
}

.btn-secondary {
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid;
}

/* ============================================
   卡片样式
   ============================================ */
.card {
    border-radius: 20px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 20px;
    z-index: -1;
    opacity: 0.1;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 0.2;
}

.card:hover {
    transform: translateY(-5px);
}

/* ============================================
   表单元素
   ============================================ */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: var(--font-size-button);
    font-weight: var(--font-weight-medium);
    margin-bottom: 0.5rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 2px solid;
    font-size: var(--font-size-body);
    font-family: var(--font-family-primary);
    transition: all 0.3s ease;
    background: transparent;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-width: 2px;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ============================================
   标签和徽章
   ============================================ */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.5rem;
    border-radius: 8px;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    min-width: 20px;
    height: 20px;
}

/* ============================================
   时间线样式
   ============================================ */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -0.5rem;
    top: 0.5rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    border: 3px solid;
}

.timeline-date {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.timeline-content {
    padding: 1rem;
    border-radius: 12px;
}

/* ============================================
   网格布局
   ============================================ */
.grid {
    display: grid;
    gap: 1.5rem;
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: 8px; }
.rounded-lg { border-radius: 12px; }
.rounded-xl { border-radius: 16px; }
.rounded-2xl { border-radius: 20px; }
.rounded-full { border-radius: 9999px; }

.shadow-sm { box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.shadow-md { box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
.shadow-lg { box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
.shadow-xl { box-shadow: 0 20px 50px rgba(0,0,0,0.15); }

.opacity-50 { opacity: 0.5; }
.opacity-70 { opacity: 0.7; }
.opacity-90 { opacity: 0.9; }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

.select-none { user-select: none; }

.transition-all { transition: all 0.3s ease; }
.transition-colors { transition: background-color 0.3s ease, color 0.3s ease; }
.transition-transform { transition: transform 0.3s ease; }

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-fadeIn {
    animation: fadeIn 0.5s ease forwards;
}

.animate-slideIn {
    animation: slideIn 0.5s ease forwards;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* ============================================
   加载状态
   ============================================ */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(10px);
}

/* ============================================
   弹窗和通知
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    border-radius: 20px;
    padding: 2rem;
    z-index: 1;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: var(--font-size-subtitle);
    font-weight: var(--font-weight-semibold);
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.25rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.modal-body {
    margin-bottom: 1.5rem;
    max-height: calc(90vh - 150px);
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.notification {
    position: fixed;
    top: 1rem;
    right: 1rem;
    max-width: 400px;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    z-index: 9999;
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s ease;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification-content {
    flex: 1;
}

.notification-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

/* ============================================
   响应式工具类
   ============================================ */
@media (max-width: 1024px) {
    .lg-hidden { display: none; }
    .lg-block { display: block; }
    .lg-flex { display: flex; }
}

@media (max-width: 768px) {
    .md-hidden { display: none; }
    .md-block { display: block; }
    .md-flex { display: flex; }
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    .experience-grid,
    .exp-others-grid,
    .campus-projects-grid {
        grid-template-columns: 1fr;
    }
    .exp-focus-card {
        max-width: 100%;
        padding: 1.5rem;
    }
    .exp-focus-card .experience-header h3,
    .exp-focus-card .experience-role {
        font-size: var(--font-size-section);
    }
}

@media (max-width: 640px) {
    .sm-hidden { display: none; }
    .sm-block { display: block; }
    .sm-flex { display: flex; }
    .nav-menu {
        display: flex;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        gap: 0.25rem;
        overflow-x: auto;
        padding: 0.5rem 0.75rem;
        background: var(--bg-overlay);
        border-bottom: 1px solid var(--border-primary);
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .nav-menu::-webkit-scrollbar {
        display: none;
    }
    .nav-link {
        flex: 0 0 auto;
        min-height: 36px;
        padding: 0.4rem 0.7rem;
        border-radius: 999px;
        font-size: 0.8rem;
        white-space: nowrap;
    }
    .nav-link.active::after {
        display: none;
    }
    .version-switch-link {
        box-shadow: none;
    }
    .container {
        padding: 0 1rem;
    }
    .profile-card {
        width: 100%;
        max-width: 340px;
    }
    .exp-focus-card {
        padding: 1.25rem;
    }
    .experience-header {
        flex-direction: column;
    }
    .experience-date {
        white-space: normal;
    }
}

/* ============================================
   Mobile layout hardening
   ============================================ */
img,
video {
    max-width: 100%;
    height: auto;
}

@media (max-width: 900px) {
    .hero-content,
    .about-content,
    .contact-content {
        flex-direction: column;
        gap: 2rem;
    }
    .hero-text,
    .about-text,
    .contact-info,
    .contact-message {
        width: 100%;
    }
    .hero-description {
        max-width: none;
    }
    .access-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
    .hobbies-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .about-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
    }
}

@media (max-width: 640px) {
    html,
    body {
        overflow-x: hidden;
        width: 100%;
    }
    body {
        font-size: var(--font-size-body);
    }
    .navbar {
        position: sticky;
        top: 0;
        z-index: 1000;
    }
    .nav-container {
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }
    .logo span {
        font-size: 0.95rem;
        white-space: nowrap;
    }
    .nav-actions {
        gap: 0.5rem;
    }
    .theme-toggle {
        min-height: 40px;
        padding: 0.5rem 0.75rem;
    }
    .theme-toggle span {
        display: none;
    }
    .user-avatar {
        width: 42px;
        height: 42px;
        object-fit: cover;
    }
    .main-content {
        width: 100%;
        padding-top: 112px;
    }
    .hero-section {
        padding: 2rem 0 2.5rem;
        margin-bottom: 1.5rem;
    }
    .hero-content,
    .experience-section,
    .campus-projects-section,
    .skills-section,
    .hobbies-section,
    .gallery-section,
    .chat-section,
    .posts-section,
    .contact-section,
    .quick-access,
    .about-section,
    .education-section,
    .self-eval-section {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    .hero-title {
        font-size: 2rem;
        line-height: 1.15;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-description {
        font-size: 0.95rem;
        line-height: 1.7;
    }
    .hero-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    .hero-actions .btn,
    .message-form .btn {
        width: 100%;
        justify-content: center;
        min-height: 44px;
    }
    .profile-card {
        max-width: 100%;
        padding: 1.5rem 1rem;
        border-radius: 20px;
    }
    .avatar-ring {
        width: 96px;
        height: 96px;
    }
    .profile-avatar {
        width: 88px;
        height: 88px;
        object-fit: cover;
    }
    .info-row {
        align-items: flex-start;
        gap: 0.55rem;
        padding: 0.55rem;
    }
    .info-value {
        overflow-wrap: anywhere;
    }
    .section-title {
        font-size: 1.45rem;
        margin-bottom: 1.25rem;
    }
    .access-grid,
    .about-stats,
    .exp-others-grid,
    .campus-projects-grid,
    .skills-grid,
    .self-eval-content {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }
    .access-card,
    .exp-main-card,
    .exp-sub-card,
    .campus-project-card,
    .skill-category,
    .self-eval-card,
    .chat-messages,
    .contact-message {
        padding: 1.15rem;
        border-radius: 16px;
    }
    .exp-main-card,
    .exp-focus-card {
        max-width: 100%;
        margin-left: 0;
        margin-right: 0;
    }
    .experience-list {
        padding-left: 0;
    }
    .experience-list li {
        font-size: 0.92rem;
        line-height: 1.75;
        overflow-wrap: anywhere;
    }
    .experience-role {
        font-size: 1rem !important;
        line-height: 1.45;
    }
    .timeline::before {
        left: 0.5rem;
    }
    .timeline-item {
        padding-left: 1.6rem;
    }
    .timeline-date {
        position: static;
        display: inline-block;
        margin-bottom: 0.75rem;
        font-size: 0.8rem;
    }
    .timeline-content {
        padding: 1rem;
    }
    .tags,
    .skill-tags {
        gap: 0.45rem;
    }
    .tag,
    .skill-tag {
        font-size: 0.8rem;
        padding: 0.32rem 0.65rem;
    }
    .hobbies-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
    }
    .hobby-item {
        padding: 1rem 0.75rem;
    }
    .gallery-grid,
    .gallery-grid-life,
    .gallery-grid-photo {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 0.75rem;
    }
    .gallery-item {
        border-radius: 14px;
        aspect-ratio: 1 / 1 !important;
    }
    .gallery-item img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
    }
    .photo-modal {
        padding: 1rem;
    }
    .photo-modal-img {
        max-width: 96vw;
        max-height: 82vh;
        object-fit: contain;
    }
    .contact-content {
        gap: 1.25rem;
    }
    .contact-item {
        align-items: flex-start;
        overflow-wrap: anywhere;
    }
    .message-form input,
    .message-form textarea {
        width: 100%;
        font-size: 16px;
    }
    .footer-content {
        padding: 1.5rem 1rem;
    }
    .footer-links {
        flex-wrap: wrap;
        gap: 0.75rem 1rem;
        justify-content: center;
    }
}

@media (max-width: 380px) {
    .gallery-grid,
    .gallery-grid-life,
    .gallery-grid-photo,
    .hobbies-grid {
        grid-template-columns: 1fr !important;
    }
    .hero-title {
        font-size: 1.75rem;
    }
}

/* ============================================
   手机端最终优化 - 排版/布局/触控/深色模式
   ============================================ */
@media (max-width: 640px) {
    /* 1. 个人简介横向排版 + 合理字号行高 */
    .about-text,
    .about-text p,
    .hero-description,
    .self-eval-card p {
        writing-mode: horizontal-tb;
        direction: ltr;
        text-align: left;
        font-size: 14px;
        line-height: 1.7;
        word-break: break-word;
        overflow-wrap: anywhere;
        white-space: normal;
    }

    .about-content {
        flex-direction: column;
    }

    .about-text {
        width: 100%;
    }

    /* 2. 所有模块卡片统一 16px 内边距 */
    .access-card,
    .exp-main-card,
    .exp-sub-card,
    .campus-project-card,
    .skill-category,
    .self-eval-card,
    .chat-messages,
    .contact-message,
    .profile-card,
    .timeline-content {
        padding: 16px;
        border-radius: 14px;
    }

    /* 模块单列网格 + 合理间距 */
    .access-grid,
    .exp-others-grid,
    .campus-projects-grid,
    .skills-grid,
    .self-eval-content,
    .about-stats {
        grid-template-columns: 1fr !important;
        gap: 12px;
    }

    /* 标签不挤压 */
    .skill-tags,
    .tags {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

    .skill-tag,
    .tag {
        font-size: 12px;
        padding: 4px 10px;
        white-space: nowrap;
    }

    /* 3. 导航栏紧凑适配 */
    .navbar {
        height: 56px;
    }

    .nav-container {
        height: 56px;
        padding: 0 12px;
        gap: 0.5rem;
    }

    .logo i {
        font-size: 1.25rem;
    }

    .logo span {
        font-size: 0.9rem;
    }

    /* 导航栏下方滚动菜单对齐 56px navbar */
    .nav-menu {
        top: 56px;
        padding: 0.5rem 0.75rem;
        gap: 0.3rem;
    }

    .nav-link {
        min-height: 36px;
        padding: 0.4rem 0.7rem;
        font-size: 0.8rem;
        border-radius: 999px;
    }

    .theme-toggle {
        min-height: 40px;
        min-width: 40px;
        padding: 0.5rem;
        font-size: 1rem;
        border-radius: 50%;
    }

    .theme-toggle span {
        display: none;
    }

    .user-avatar {
        width: 40px;
        height: 40px;
    }

    .nav-actions {
        gap: 0.6rem;
    }

    /* 5. 触控区域最小 44px */
    .nav-link,
    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-outline,
    .skill-tag,
    .tag,
    .hobby-item,
    .gallery-item,
    .access-card,
    .card,
    .version-switch-link,
    .close-notification,
    .timeline-content,
    .contact-item,
    a[href],
    [role="button"] {
        min-height: 44px;
        min-width: 44px;
    }

    /* 触控点击反馈 */
    .btn:active,
    .nav-link:active,
    .access-card:active,
    .card:active,
    .skill-tag:active,
    .tag:active,
    .hobby-item:active,
    .gallery-item:active,
    .version-switch-link:active,
    .timeline-content:active,
    a[href]:active,
    [role="button"]:active {
        transform: scale(0.96);
        opacity: 0.85;
        transition-duration: 0.1s;
    }

    .theme-toggle:active {
        transform: scale(0.92);
        transition-duration: 0.1s;
    }

    /* 个人信息行不溢出 */
    .info-row {
        flex-wrap: wrap;
        font-size: 13px;
        gap: 4px;
    }

    .info-label {
        min-width: auto;
    }

    /* 经历卡片内容不溢出 */
    .experience-header {
        flex-direction: column;
        gap: 4px;
    }

    .experience-date {
        white-space: normal;
    }
}