/* ========================================
   变量与主题
   ======================================== */
:root {
    /* 暗色主题 */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(168, 85, 247, 0.3);
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-pink: #ec4899;
    --accent-cyan: #06b6d4;
    --gradient-1: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
    --gradient-2: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-3: linear-gradient(135deg, #a855f7 0%, #3b82f6 50%, #06b6d4 100%);
    --gradient-text: linear-gradient(90deg, #a855f7, #3b82f6, #06b6d4, #ec4899, #a855f7);
    --shadow-glow: 0 0 40px rgba(168, 85, 247, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --blur: blur(20px);
}

[data-theme="light"] {
    --bg-primary: #f5f5fa;
    --bg-secondary: #ffffff;
    --bg-card: rgba(0, 0, 0, 0.02);
    --bg-card-hover: rgba(0, 0, 0, 0.04);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(168, 85, 247, 0.3);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --text-muted: #8a8a9a;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Space Grotesk', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.4s ease;
    cursor: none;
}

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

::selection {
    background: var(--accent-purple);
    color: #fff;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--gradient-1);
    border-radius: 4px;
}

/* ========================================
   自定义光标
   ======================================== */
.cursor-dot,
.cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background: #fff;
    transition: transform 0.1s ease;
}

.cursor-ring {
    width: 36px;
    height: 36px;
    border: 2px solid rgba(168, 85, 247, 0.6);
    transition: transform 0.2s ease, width 0.3s ease, height 0.3s ease, border-color 0.3s ease;
}

.cursor-ring.hover-active {
    width: 60px;
    height: 60px;
    border-color: rgba(236, 72, 153, 0.8);
    background: rgba(168, 85, 247, 0.1);
}

/* 移动端隐藏自定义光标 */
@media (max-width: 768px) {
    body { cursor: auto; }
    .cursor-dot, .cursor-ring { display: none; }
}

/* ========================================
   背景效果
   ======================================== */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: blobFloat 20s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.4), transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.blob-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
    bottom: -20%;
    right: -10%;
    animation-delay: -5s;
}

.blob-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.25), transparent 70%);
    top: 40%;
    left: 50%;
    animation-delay: -10s;
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(80px, -60px) scale(1.1); }
    66% { transform: translate(-60px, 80px) scale(0.9); }
}

[data-theme="light"] .blob {
    opacity: 0.3;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.4s ease;
}

.navbar.scrolled {
    padding: 12px 0;
    background: var(--bg-card);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--border-color);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.nav-logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 800;
    transition: transform 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.1);
}

.logo-accent {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    position: relative;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.3s ease;
    border-radius: 8px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease, left 0.3s ease;
    border-radius: 2px;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
    left: 20%;
}

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: none;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(180deg) scale(1.1);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-burger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-burger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-burger.active span:nth-child(2) {
    opacity: 0;
}
.nav-burger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   Hero
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 24px 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    animation: heroFadeIn 1s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 10px #4ade80;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 20px;
}

.title-line {
    display: block;
    font-weight: 300;
    font-size: 0.5em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.title-gradient {
    background: var(--gradient-text);
    background-size: 300% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease infinite;
}

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

.hero-subtitle {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(1rem, 3vw, 1.3rem);
    color: var(--accent-purple);
    margin-bottom: 24px;
    min-height: 1.6em;
}

.subtitle-prefix {
    color: var(--accent-cyan);
    margin-right: 8px;
}

.cursor-blink {
    animation: blink 1s step-end infinite;
    color: var(--accent-pink);
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: none;
}

.btn svg {
    transition: transform 0.3s ease;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(168, 85, 247, 0.5);
}

.btn-primary:hover svg {
    transform: translateX(4px);
}

.btn-ghost {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

.btn-ghost:hover {
    border-color: var(--accent-purple);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero 社交链接 */
.hero-socials {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

.social-link:hover {
    color: var(--text-primary);
    border-color: var(--accent-purple);
    transform: translateY(-4px) rotate(-8deg);
    box-shadow: 0 8px 20px rgba(168, 85, 247, 0.3);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    writing-mode: vertical-rl;
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-purple), transparent);
    border-radius: 2px;
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); opacity: 0.5; }
    50% { transform: scaleY(1.5); opacity: 1; }
}

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   通用 Section
   ======================================== */
section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 24px;
    position: relative;
    z-index: 1;
}

.section-header {
    margin-bottom: 60px;
}

.section-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--accent-purple);
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--gradient-1);
    border-radius: 4px;
}

.text-gradient {
    background: var(--gradient-text);
    background-size: 300% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease infinite;
}

/* ========================================
   滚动揭示动画
   ======================================== */
.reveal {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal[data-reveal="left"] { transform: translateX(-60px); }
.reveal[data-reveal="right"] { transform: translateX(60px); }
.reveal[data-reveal="up"] { transform: translateY(60px); }
.reveal[data-reveal="down"] { transform: translateY(-60px); }

.reveal.visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* ========================================
   关于
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-lead {
    font-size: 1.3rem;
    font-weight: 500;
    margin-bottom: 20px;
    line-height: 1.6;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px 24px;
    text-align: center;
    transition: all 0.3s ease;
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.stat-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-glow);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.stat-bar {
    width: 0;
    height: 2px;
    background: var(--gradient-2);
    border-radius: 2px;
    margin: 0 auto;
    transition: width 1.5s ease;
}

.stat-card.visible .stat-bar {
    width: 80%;
}

/* ========================================
   技能
   ======================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    transition: all 0.4s ease;
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    position: relative;
    overflow: hidden;
}

.skill-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.08), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.skill-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.skill-card:hover::after {
    opacity: 1;
}

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: inline-block;
    transition: transform 0.4s ease;
}

.skill-card:hover .skill-icon {
    transform: scale(1.2) rotate(10deg);
}

.skill-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    padding: 4px 12px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.78rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.skill-card:hover .tag {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.skill-progress {
    width: 100%;
    height: 6px;
    background: var(--bg-card-hover);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress-bar {
    height: 100%;
    width: 0;
    background: var(--gradient-3);
    border-radius: 4px;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.skill-progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shimmer 2s linear infinite;
}

@keyframes shimmer {
    from { transform: translateX(-100px); }
    to { transform: translateX(20px); }
}

/* ========================================
   项目
   ======================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.project-visual {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-visual-1 { background: linear-gradient(135deg, rgba(168,85,247,0.15), rgba(59,130,246,0.1)); }
.project-visual-2 { background: linear-gradient(135deg, rgba(236,72,153,0.15), rgba(168,85,247,0.1)); }
.project-visual-3 { background: linear-gradient(135deg, rgba(6,182,212,0.15), rgba(59,130,246,0.1)); }

.project-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(168,85,247,0.2), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-card:hover .project-visual::before {
    opacity: 1;
}

/* Mockup */
.project-mockup {
    width: 80%;
    max-width: 280px;
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    transform: perspective(800px) rotateX(5deg) rotateY(-5deg);
    transition: transform 0.5s ease;
    z-index: 1;
}

.project-card:hover .project-mockup {
    transform: perspective(800px) rotateX(0deg) rotateY(0deg) scale(1.05);
}

.mockup-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.mockup-dot.red { background: #ff5f57; }
.mockup-dot.yellow { background: #febc2e; }
.mockup-dot.green { background: #28c840; }

.mockup-content {
    margin-top: 12px;
}

.mockup-line {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    margin-bottom: 8px;
}

.w-40 { width: 40%; }
.w-50 { width: 50%; }
.w-60 { width: 60%; }
.w-80 { width: 80%; }

.mockup-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 12px;
}

.mockup-box {
    height: 40px;
    background: var(--border-color);
    border-radius: 6px;
    animation: mockupPulse 3s ease-in-out infinite;
}

.mockup-box:nth-child(2) { animation-delay: 0.5s; }
.mockup-box:nth-child(3) { animation-delay: 1s; }

@keyframes mockupPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.mockup-chart {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 60px;
    margin-top: 12px;
}

.chart-bar {
    flex: 1;
    height: var(--h);
    background: var(--gradient-2);
    border-radius: 4px 4px 0 0;
    animation: chartGrow 1.5s ease-out;
    transform-origin: bottom;
}

@keyframes chartGrow {
    from { transform: scaleY(0); }
    to { transform: scaleY(1); }
}

.mockup-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-1);
    margin: 0 auto 12px;
    animation: circleSpin 4s linear infinite;
}

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

.project-info {
    padding: 24px;
}

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

.project-tag {
    padding: 3px 10px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.72rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-purple);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.project-card:hover .project-title {
    color: var(--accent-purple);
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.project-links {
    display: flex;
    gap: 16px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.project-link:hover {
    color: var(--accent-purple);
}

/* ========================================
   联系
   ======================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.contact-heading {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.contact-text {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--accent-purple);
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
}

.contact-email:hover {
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-glow);
}

/* 表单 */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

.form-group {
    position: relative;
    margin-bottom: 28px;
}

.form-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--border-color);
    padding: 12px 0;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease;
    cursor: none;
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-label {
    position: absolute;
    top: 12px;
    left: 0;
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    transition: all 0.3s ease;
}

.form-input:focus ~ .form-label,
.form-input:valid ~ .form-label {
    top: -16px;
    font-size: 0.8rem;
    color: var(--accent-purple);
}

.form-underline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.4s ease;
}

.form-input:focus ~ .form-underline {
    width: 100%;
}

.form-status {
    margin-top: 16px;
    text-align: center;
    font-size: 0.9rem;
    color: #4ade80;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.form-status.show {
    opacity: 1;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 24px;
    position: relative;
    z-index: 1;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.heart {
    color: var(--accent-pink);
    animation: heartbeat 1.5s ease-in-out infinite;
    display: inline-block;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 900px) {
    .about-grid,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 64px;
        right: 0;
        width: 100%;
        height: calc(100vh - 64px);
        background: var(--bg-secondary);
        backdrop-filter: var(--blur);
        -webkit-backdrop-filter: var(--blur);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 20px;
        transform: translateX(100%);
        transition: transform 0.4s ease;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 1.2rem;
    }

    .nav-burger {
        display: flex;
    }

    section {
        padding: 60px 20px;
    }

    .hero {
        padding: 80px 20px 40px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        justify-content: center;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

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

    .skill-tags {
        gap: 6px;
    }
}

/* ========================================
   减少动画偏好
   ======================================== */
@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;
    }

    .blob, #particleCanvas {
        display: none;
    }
}