:root {
    --primary: #2E75B6;
    --primary-dark: #1E4E7A;
    --primary-light: #4A90C2;
    --accent: #00B894;
    --text: #2C3E50;
    --text-light: #7F8C8D;
    --bg: #FAFBFC;
    --bg-card: #FFFFFF;
    --border: #E8ECF0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
    /* 禁止微信/iOS 强制调整字体大小 */
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* 微信安全区 */
    padding-bottom: env(safe-area-inset-bottom);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white;
    padding: 80px 20px 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    animation: pulse 15s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    background: var(--primary);
    margin: 0 auto 24px;
    display: block;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 4px solid rgba(255, 255, 255, 0.3);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.header .subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 24px;
    font-weight: 300;
}

.contact-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: -4px;
}

.contact-item {
    display: flex;
    align-items: center;
    margin: 4px;
    gap: 8px;
    background: rgba(255, 255, 255, 0.25);
    padding: 8px 16px;
    border-radius: 24px;
    /* backdrop-filter 兼容微信 */
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
}

.contact-item a {
    color: white;
    text-decoration: none;
}

.contact-item .icon {
    font-size: 1.1rem;
}

/* Main Content */
.container {
    max-width: 1100px;
    margin: -60px auto 0;
    padding: 0 20px 60px;
    position: relative;
    z-index: 2;
}

/* Sections */
section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

section:hover {
    box-shadow: var(--shadow-hover);
}

.section-title {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary);
    display: inline-block;
    font-weight: 700;
}

/* Advantages */
.advantage-list {
    display: grid;
    gap: 16px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: linear-gradient(135deg, #f8fbff 0%, #f0f7fc 100%);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow);
}

.advantage-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.advantage-content h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: var(--primary-dark);
}

.advantage-content p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Skills - 单行列表式 */
.skills-list {
    display: grid;
    gap: 12px;
}

.skill-row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: #f8fbff;
    border-radius: 10px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.skill-row:hover {
    border-color: var(--primary);
    background: #f0f7fc;
}

.skill-row h4 {
    color: var(--primary);
    font-size: 0.95rem;
    min-width: 140px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    background: white;
    color: var(--text);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.skill-tag:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.skill-tag.primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    font-weight: 500;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--primary-light));
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding: 24px;
    background: #f8fbff;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.timeline-item:hover {
    box-shadow: var(--shadow);
    transform: translateX(8px);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 32px;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--bg-card);
    box-shadow: 0 0 0 3px var(--primary);
}

.timeline-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    gap: 8px;
}

.timeline-company {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.timeline-role {
    color: var(--primary);
    font-weight: 500;
}

.timeline-period {
    background: var(--primary);
    color: white;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.timeline-company-info {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    border-left: 3px solid var(--accent);
}

.timeline-company-info strong {
    color: var(--accent);
}

.achievements {
    display: grid;
    gap: 10px;
}

.achievement {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.achievement-label {
    min-width: 100px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.achievement-value {
    color: var(--text);
    font-weight: 500;
}

.achievement-value .highlight {
    color: var(--primary);
    font-weight: 700;
}

.achievement-value .green {
    color: #00B894;
}

.achievement-value .orange {
    color: #E17055;
}

/* Projects - 单列时间线式 */
.projects-list {
    display: grid;
    gap: 20px;
}

.project-item {
    background: #f8fbff;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    transition: all 0.3s ease;
}

.project-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateX(8px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.project-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.project-tag {
    background: var(--accent);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    white-space: nowrap;
}

.project-period {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.project-list {
    list-style: none;
}

.project-list li {
    padding: 6px 0;
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.project-list li::before {
    content: '▸';
    color: var(--primary);
    font-weight: bold;
}

/* Education & Certificates */
.edu-cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.edu-cert-card {
    background: linear-gradient(135deg, #f8fbff 0%, #f0f7fc 100%);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.edu-cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.edu-cert-card h4 {
    color: var(--primary);
    margin-bottom: 8px;
}

.edu-cert-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 20px;
    padding-bottom: calc(40px + env(safe-area-inset-bottom));
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
}

/* 联系方式 */
.contact-section {
    padding: 40px 20px;
    background: #f8fbff;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.contact-section img:hover {
    transform: scale(1.05);
}

/* 保留旧 CTA 样式备用 */
.cta-section {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 16px;
    color: white;
}

.cta-section h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.cta-section p {
    opacity: 0.9;
    margin-bottom: 24px;
}

.cta-button {
    display: inline-block;
    background: white;
    color: var(--primary);
    padding: 14px 36px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.3);
}

/* ==================== Responsive ==================== */

/* 平板 & 大屏手机（≤768px） */
@media (max-width: 768px) {
    .header {
        padding: 60px 16px 80px;
    }

    .header h1 {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }

    .header .subtitle {
        font-size: 1rem;
    }

    .avatar {
        width: 90px;
        height: 90px;
        font-size: 36px;
        margin-bottom: 16px;
    }

    .contact-bar {
        flex-direction: column;
        align-items: center;
        margin: 0;
    }

    .contact-item {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        margin: 4px 0;
    }

    .container {
        margin-top: -40px;
        padding: 0 12px 40px;
    }

    section {
        padding: 20px 14px;
        border-radius: 12px;
        margin-bottom: 16px;
    }

    .section-title {
        font-size: 1.2rem;
        margin-bottom: 16px;
    }

    /* 核心优势 */
    .advantage-item {
        padding: 14px;
        gap: 12px;
    }

    .advantage-icon {
        width: 40px;
        height: 40px;
        font-size: 20px;
        border-radius: 10px;
    }

    .advantage-content h3 {
        font-size: 1rem;
    }

    .advantage-content p {
        font-size: 0.88rem;
    }

    /* 技术栈 */
    .skills-list {
        gap: 8px;
    }

    .skill-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 12px 14px;
    }

    .skill-row h4 {
        min-width: auto;
    }

    .skill-tag {
        padding: 5px 10px;
        font-size: 0.8rem;
    }

    /* 工作经历 - 时间线 */
    .timeline {
        padding-left: 20px;
    }

    .timeline::before {
        left: 6px;
    }

    .timeline-item {
        padding: 16px 14px;
        margin-bottom: 20px;
    }

    .timeline-item::before {
        left: -18px;
        width: 12px;
        height: 12px;
    }

    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        margin-bottom: 8px;
    }

    .timeline-company {
        font-size: 1.05rem;
    }

    .timeline-period {
        align-self: flex-start;
    }

    .timeline-company-info {
        font-size: 0.85rem;
        padding: 10px;
        margin-bottom: 12px;
    }

    /* 成就条目 */
    .achievement {
        flex-direction: column;
        gap: 4px;
        font-size: 0.9rem;
    }

    .achievement-label {
        min-width: auto;
        font-size: 0.85rem;
    }

    /* 项目经历 */
    .projects-list {
        gap: 12px;
    }

    .project-item {
        padding: 16px 14px;
    }

    .project-header {
        flex-wrap: wrap;
        gap: 6px;
    }

    .project-title {
        font-size: 1rem;
    }

    .project-list li {
        font-size: 0.9rem;
        padding: 5px 0;
    }

    /* 教育 */
    .edu-cert-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .edu-cert-card {
        padding: 16px 10px;
    }

    .edu-cert-card h4 {
        font-size: 0.95rem;
    }

    .edu-cert-card p {
        font-size: 0.82rem;
    }

    /* 联系方式 */
    .contact-section img {
        max-width: 200px !important;
    }

    /* 禁用hover动画（移动端无hover） */
    .advantage-item:hover,
    .timeline-item:hover,
    .project-item:hover {
        transform: none;
        box-shadow: var(--shadow);
    }
}

/* 小屏手机（≤480px） */
@media (max-width: 480px) {
    .header {
        padding: 40px 12px 60px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 0.9rem;
    }

    .avatar {
        width: 80px;
        height: 80px;
        font-size: 32px;
    }

    .container {
        padding: 0 8px 30px;
    }

    section {
        padding: 16px 12px;
    }

    .section-title {
        font-size: 1.1rem;
    }

    .skill-tag {
        padding: 4px 8px;
        font-size: 0.78rem;
    }

    .edu-cert-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .contact-section img {
        max-width: 180px !important;
    }
}

/* Animation - 微信兼容：初始可见，避免 fadeInUp 导致闪白 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

section {
    opacity: 1;
    animation: fadeInUp 0.5s ease both;
}

section:nth-child(1) { animation-delay: 0.05s; }
section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.15s; }
section:nth-child(4) { animation-delay: 0.2s; }
section:nth-child(5) { animation-delay: 0.25s; }
section:nth-child(6) { animation-delay: 0.3s; }
section:nth-child(7) { animation-delay: 0.35s; }

/* 微信内置浏览器专项修复 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}