/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

:root {
    /* Dark theme (default) */
    --bg-primary: #0f0f14;
    --bg-secondary: #1a1a24;
    --bg-card: #22222f;
    --bg-card-hover: #2a2a3a;
    --text-primary: #e4e4ed;
    --text-secondary: #9898a8;
    --text-muted: #6b6b7a;
    --accent: #7c5cfc;
    --accent-glow: rgba(124, 92, 252, 0.3);
    --accent-glow-2: rgba(124, 92, 252, 0.08);
    --accent-soft: #a78bfa;
    --border: #2e2e3e;
    --nav-bg: rgba(15, 15, 20, 0.85);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="beer"] {
    --bg-primary: #fcf5eb;
    --bg-secondary: #fffaf2;
    --bg-card: #ffffff;
    --bg-card-hover: #fdf3e6;
    --text-primary: #3d2e1e;
    --text-secondary: #7a6548;
    --text-muted: #b0976a;
    --accent: #d97706;
    --accent-glow: rgba(217, 119, 6, 0.18);
    --accent-glow-2: rgba(217, 119, 6, 0.06);
    --accent-soft: #f59e0b;
    --border: #e8d5b8;
    --nav-bg: rgba(252, 245, 235, 0.90);
    --shadow: 0 4px 24px rgba(180, 120, 40, 0.10);
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    /* 防止移动端 100vh 包含地址栏 */
    min-height: 100dvh;
}

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(16px) saturate(1.5);
    -webkit-backdrop-filter: blur(16px) saturate(1.5);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition), border-color var(--transition);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo-dot {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 8px;
    transition: all var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition);
    /* 移动端确保触控区域足够 */
    min-width: 44px;
    min-height: 44px;
}

.theme-toggle:hover {
    color: var(--accent);
    background: var(--bg-card);
}

.theme-toggle .sun-icon,
.theme-toggle .beer-icon,
.theme-toggle .moon-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity var(--transition), transform var(--transition);
}

[data-theme="dark"] .theme-toggle .sun-icon { opacity: 1; transform: translate(-50%,-50%) rotate(0deg); }
[data-theme="dark"] .theme-toggle .beer-icon { opacity: 0; transform: translate(-50%,-50%) rotate(90deg); }
[data-theme="dark"] .theme-toggle .moon-icon { opacity: 0; transform: translate(-50%,-50%) rotate(90deg); }
[data-theme="beer"] .theme-toggle .sun-icon { opacity: 0; transform: translate(-50%,-50%) rotate(-90deg); }
[data-theme="beer"] .theme-toggle .beer-icon { opacity: 1; transform: translate(-50%,-50%) rotate(0deg); }
[data-theme="beer"] .theme-toggle .moon-icon { opacity: 0; transform: translate(-50%,-50%) rotate(-90deg); }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    /* 移动端触控区域 */
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 64px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 600px 400px at 50% 30%, var(--accent-glow), transparent 70%),
        radial-gradient(ellipse 400px 300px at 70% 60%, var(--accent-glow-2), transparent 60%);
    pointer-events: none;
}

.hero-inner {
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 20px 0;
}

.hero-avatar-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 28px;
}

.hero-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent);
    box-shadow: 0 0 40px var(--accent-glow);
    transition: transform var(--transition);
    animation: avatarFloat 4s ease-in-out infinite;
}

.hero-avatar:hover {
    transform: scale(1.05);
}

@keyframes avatarFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-soft));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    word-break: break-word;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-social {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
    cursor: pointer;
}

.social-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.social-btn--qq:hover {
    border-color: #07b16a;
}

.scroll-hint {
    position: absolute;
    bottom: -80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
    opacity: 0.6;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

/* ===== Section ===== */
.section {
    padding: 100px 0;
    transition: background var(--transition);
}

.section--alt {
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--accent);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.about-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.about-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== Projects ===== */
.projects-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.project-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: all var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

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

.project-card-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.project-card-stars {
    font-size: 0.85rem;
    flex-shrink: 0;
}

.project-card-desc {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 14px;
}

.project-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.project-tag {
    background: var(--accent-glow);
    color: var(--accent-soft);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.project-card-link {
    color: var(--accent-soft);
    font-size: 0.85rem;
    font-weight: 500;
}

.project-card-link--soon {
    color: var(--text-muted);
    font-style: italic;
}

/* ===== Posts ===== */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    transition: all var(--transition);
    cursor: pointer;
}

.post-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.post-card-tag {
    background: var(--accent-glow);
    color: var(--accent-soft);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.post-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
}

.post-card-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.post-card-footer {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-soft);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    cursor: pointer;
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.contact-icon {
    color: var(--accent-soft);
    margin-bottom: 12px;
}

.contact-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.contact-link {
    color: var(--accent-soft);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-motto {
    margin-top: 4px;
    font-style: italic;
}

/* ===== Toasts ===== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 9999;
    pointer-events: none;
    backdrop-filter: blur(12px);
    text-align: center;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.open {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    max-width: 680px;
    width: 100%;
    max-height: 85vh;
    max-height: 85dvh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 28px 32px 0;
}

.modal-header-info {
    flex: 1;
}

.modal-header-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.modal-header-tag {
    background: var(--accent-glow);
    color: var(--accent-soft);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
}

.modal-close {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    font-size: 1.2rem;
    transition: all var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
    border-color: var(--accent);
}

.modal-body {
    padding: 24px 32px 32px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

.modal-body p {
    margin-bottom: 1em;
}

.modal-body code {
    background: var(--bg-card);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
}

.modal-body pre {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    overflow-x: auto;
    margin: 1em 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.modal-body blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    margin: 1em 0;
    color: var(--text-muted);
    font-style: italic;
}

.modal-body ul, .modal-body ol {
    padding-left: 24px;
    margin: 1em 0;
}

.modal-body li {
    margin-bottom: 4px;
}

.modal-body img {
    max-width: 100%;
    border-radius: var(--radius);
    margin: 1em 0;
}

.modal-body h2 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin: 1.5em 0 0.5em;
}

.modal-body h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 1.2em 0 0.4em;
}

.modal-body a {
    color: var(--accent-soft);
    text-decoration: underline;
}

/* ===== Responsive ===== */
/* 平板及以下 */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }

    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--nav-bg);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .hamburger { display: flex; }

    .about-grid,
    .projects-list,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .nav-link {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .post-card { padding: 20px 24px; }
    .project-card { padding: 20px 24px; }
    .section { padding: 64px 0; }

    .modal { max-height: 90vh; max-height: 90dvh; }
    .modal-header { padding: 20px 20px 0; }
    .modal-body { padding: 16px 20px 24px; }
    .modal-title { font-size: 1.25rem; }

    .hero-social { gap: 10px; }

    .contact-grid { gap: 14px; }
    .contact-card { padding: 24px 20px; }
}

/* 手机 */
@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-avatar {
        width: 96px;
        height: 96px;
    }
    .hero-subtitle { font-size: 0.95rem; }
    .hero-desc { font-size: 0.88rem; }
    .hero-social {
        flex-direction: column;
        align-items: center;
    }
    .social-btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
        padding: 12px 20px;
    }
    .scroll-hint { bottom: -60px; }
    .container { padding: 0 16px; }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 28px;
    }
    .about-card, .project-card, .contact-card { padding: 20px; }
    .projects-list { gap: 12px; }
    .post-card { padding: 16px 20px; }
    .post-card-title { font-size: 1.05rem; }

    .modal-header { padding: 16px 16px 0; }
    .modal-body { padding: 12px 16px 20px; }
    .modal-title { font-size: 1.1rem; }
    .modal-body pre { padding: 12px 14px; font-size: 0.8rem; }
}

/* 超小屏 */
@media (max-width: 360px) {
    .hero-title { font-size: 1.7rem; }
    .hero-avatar { width: 80px; height: 80px; }
    .container { padding: 0 12px; }
    .section { padding: 48px 0; }
    .section-title { font-size: 1.3rem; }
    .about-card, .project-card { padding: 16px; }
}

/* 横屏手机提示 */
@media (max-height: 480px) and (orientation: landscape) {
    .hero { min-height: 120dvh; padding-top: 64px; }
    .hero-avatar { width: 72px; height: 72px; margin-bottom: 16px; }
    .hero-title { font-size: 1.8rem; }
    .hero-desc { margin-bottom: 20px; }
    .hero-social { flex-direction: row; }
    .social-btn { width: auto; max-width: none; }
}