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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #8b5cf6;
    --green: #10b981;
    --bg: #fafbfc;
    --card: #ffffff;
    --text: #111827;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.08);
    --shadow-md: 0 4px 12px 0 rgb(0 0 0 / 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ==================== Hero ==================== */
.hero {
    background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #1e293b 100%);
    padding: 80px 24px 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M0 0h40v40H0V0zm20 20h20v20H20V20z'/%3E%3C/g%3E%3C/svg%3E");
}

.hero-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    position: relative;
    z-index: 1;
}

.hero-left {
    color: white;
}

.greeting {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.7;
    margin-bottom: 8px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .role {
    font-size: 22px;
    font-weight: 500;
    color: #60a5fa;
    margin-bottom: 12px;
}

.hero .intro {
    font-size: 14px;
    color: #94a3b8;
    margin-bottom: 16px;
}

.tags-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tags-row span {
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 13px;
    color: #cbd5e1;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: #cbd5e1;
    font-size: 14px;
    transition: all 0.2s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateX(4px);
}

.contact-item i {
    width: 20px;
    color: #60a5fa;
}

/* ==================== Section ==================== */
.block {
    padding: 56px 24px;
    max-width: 900px;
    margin: 0 auto;
}

.block.alt {
    background: var(--card);
}

.block-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
}

.block-header i {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.block-header h2 {
    font-size: 22px;
    font-weight: 600;
}

/* ==================== 教育 ==================== */
.edu-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.edu-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.2s ease;
}

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

.edu-main h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.edu-main p {
    font-size: 14px;
    color: var(--text-secondary);
}

.edu-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.badge {
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 20px;
}

.badge.done {
    background: var(--bg);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.time {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==================== 卡片列表 ==================== */
.card-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.exp-card,
.project-card {
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.2s ease;
}

.exp-card:hover,
.project-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
}

.card-title h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.card-title p {
    font-size: 14px;
    color: var(--primary);
}

.card-time {
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg);
    padding: 6px 12px;
    border-radius: 20px;
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
}

.exp-list {
    margin-bottom: 14px;
    padding-left: 20px;
}

.exp-list li {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 8px;
}

.exp-list li:last-child {
    margin-bottom: 0;
}

/* ==================== 项目卡片 ==================== */
.project-card {
    display: flex;
    gap: 20px;
}

.project-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    flex-shrink: 0;
}

.project-icon.green {
    background: linear-gradient(135deg, var(--green) 0%, #059669 100%);
}

.project-info {
    flex: 1;
}

.project-info h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.project-info .tech {
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 10px;
}

.project-info .desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
}

/* ==================== 标签 ==================== */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.card-tags span {
    padding: 5px 12px;
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* ==================== 技能 ==================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.skill-box {
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.skill-box h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.skill-list span {
    padding: 7px 14px;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

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

/* ==================== 联系 ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.2s ease;
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--primary);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.contact-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.contact-text .label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-text .value {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
}

/* ==================== 页脚 ==================== */
footer {
    padding: 32px 24px;
    text-align: center;
    background: #1e293b;
    color: #94a3b8;
    font-size: 13px;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .hero-inner {
        flex-direction: column;
        text-align: center;
        gap: 32px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .tags-row {
        justify-content: center;
    }

    .contact-list {
        width: 100%;
    }

    .contact-item {
        justify-content: center;
    }

    .edu-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .edu-right {
        flex-direction: row;
        align-items: center;
    }

    .card-top {
        flex-direction: column;
        gap: 8px;
    }

    .project-card {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 60px 20px 40px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .block {
        padding: 40px 20px;
    }

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