/* ========================================
   Jalen 个人网站 - 高端极简设计
   ======================================== */

/* CSS 变量 */
:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #111111;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --accent: #ffffff;
  --accent-gray: #888888;
  --border: rgba(255, 255, 255, 0.08);
  --gradient-1: rgba(255, 255, 255, 0.03);
  --gradient-2: rgba(255, 255, 255, 0.01);

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* 重置样式 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 无障碍跳转链接 */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  padding: 1rem 2rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: 0 0 12px 12px;
  z-index: 10000;
  font-weight: 500;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

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

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  cursor: none;
}

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

button {
  font-family: inherit;
  cursor: none;
}

/* 选中文本样式 */
::selection {
  background: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-gray);
  border-radius: 3px;
}

/* ========================================
   加载动画
   ======================================== */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.8s var(--ease-out), visibility 0.8s;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-logo {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) forwards;
}

.loader-bar {
  width: 120px;
  height: 1px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}

.loader-bar::after {
  content: '';
  position: absolute;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--text-primary);
  animation: loading 1.5s var(--ease-in-out) forwards;
}

@keyframes loading {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* ========================================
   自定义光标
   ======================================== */
.cursor {
  width: 8px;
  height: 8px;
  background: var(--text-primary);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: transform 0.1s, opacity 0.3s;
  mix-blend-mode: difference;
}

.cursor-follower {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9997;
  transform: translate(-50%, -50%);
  transition: transform 0.15s var(--ease-out), width 0.3s, height 0.3s, border-color 0.3s;
}

.cursor.hover {
  transform: translate(-50%, -50%) scale(0.5);
}

.cursor-follower.hover {
  width: 60px;
  height: 60px;
  border-color: var(--text-primary);
}

@media (max-width: 768px) {
  .cursor, .cursor-follower {
    display: none;
  }
  body {
    cursor: auto;
  }
}

/* ========================================
   导航
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  mix-blend-mode: difference;
}

.nav-logo a {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  position: relative;
  padding: 0.5rem 0;
  overflow: hidden;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--text-primary);
  transform: translateX(-101%);
  transition: transform 0.4s var(--ease-out);
}

.nav-link:hover::after {
  transform: translateX(0);
}

.nav-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  cursor: pointer;
}

.nav-menu-btn span {
  width: 24px;
  height: 1px;
  background: var(--text-primary);
  transition: transform 0.3s var(--ease-out);
}

.nav-menu-btn.active span:first-child {
  transform: rotate(45deg) translateY(5px);
}

.nav-menu-btn.active span:last-child {
  transform: rotate(-45deg) translateY(-5px);
}

@media (max-width: 768px) {
  .nav {
    padding: 1rem 1.5rem;
  }

  .nav-links {
    display: none;
  }

  .nav-menu-btn {
    display: flex;
  }
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease-out), visibility 0.5s;
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.mobile-link {
  font-size: 2rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s;
}

.mobile-menu.active .mobile-link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.active .mobile-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active .mobile-link:nth-child(2) { transition-delay: 0.2s; }
.mobile-menu.active .mobile-link:nth-child(3) { transition-delay: 0.3s; }
.mobile-menu.active .mobile-link:nth-child(4) { transition-delay: 0.4s; }

/* ========================================
   Hero 主视觉区域
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  top: -20%;
  right: -10%;
  animation: float 20s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, #0f3460, #16213e);
  bottom: -10%;
  left: -5%;
  animation: float 25s ease-in-out infinite reverse;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: float 30s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(30px, -30px); }
  50% { transform: translate(-20px, 20px); }
  75% { transform: translate(20px, 30px); }
}

.noise-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  padding: 2rem;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: 50px;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 6rem);
  font-weight: 300;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-title span {
  display: block;
}

.hero-name {
  font-weight: 600;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-gray));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: 50px;
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-primary);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--gradient-1);
  border-color: var(--text-secondary);
}

/* 滚动指示器 */
.hero-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
}

.scroll-line {
  width: 2px;
  height: 8px;
  background: var(--text-primary);
  border-radius: 1px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 2s var(--ease-in-out) infinite;
}

@keyframes scroll {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(12px); opacity: 0; }
}

/* ========================================
   通用 Section 样式
   ======================================== */
.section {
  padding: 8rem 0;
  position: relative;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.02em;
}

/* 动画项目初始状态 */
.animate-item {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.animate-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   关于我
   ======================================== */
.about {
  background: var(--bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.about-intro {
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-number::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* 技能条 */
.skills-title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.skill-name {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.skill-bar {
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--text-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.5s var(--ease-out);
}

.skill-progress.animate {
  transform: scaleX(var(--progress));
}

/* ========================================
   作品集
   ======================================== */
.works-filter {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50px;
  transition: all 0.3s var(--ease-out);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

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

@media (max-width: 768px) {
  .works-grid {
    grid-template-columns: 1fr;
  }
}

.work-card {
  background: var(--bg-secondary);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.5s var(--ease-out);
}

.work-card:hover {
  transform: translateY(-8px);
}

.work-image {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
}

.work-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 200;
  color: var(--border);
}

.work-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
}

.work-card:hover .work-overlay {
  opacity: 1;
}

.work-link {
  padding: 0.875rem 2rem;
  font-size: 0.875rem;
  border: 1px solid var(--text-primary);
  border-radius: 50px;
  transition: background 0.3s;
}

.work-link:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
}

.work-info {
  padding: 1.5rem;
}

.work-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.work-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.work-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  background: var(--bg-tertiary);
  border-radius: 50px;
  color: var(--text-muted);
}

/* ========================================
   博客
   ======================================== */
.blog {
  background: var(--bg-secondary);
}

.blog-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.blog-card {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 2rem;
  padding: 2rem;
  background: var(--bg-tertiary);
  border-radius: 16px;
  border: 1px solid transparent;
  transition: border-color 0.3s, transform 0.4s var(--ease-out);
}

.blog-card:hover {
  border-color: var(--border);
  transform: translateX(8px);
}

@media (max-width: 600px) {
  .blog-card {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.blog-date {
  text-align: center;
}

.blog-day {
  display: block;
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1;
}

.blog-month {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.blog-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  transition: color 0.3s;
}

.blog-card:hover .blog-title {
  color: var(--accent-gray);
}

.blog-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.blog-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.3s;
}

.blog-link:hover {
  color: var(--text-primary);
}

.blog-more {
  text-align: center;
  margin-top: 3rem;
}

/* ========================================
   联系我
   ======================================== */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.contact-intro {
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s, background 0.3s;
}

.contact-link:hover {
  border-color: var(--text-secondary);
  background: var(--gradient-1);
}

.contact-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 10px;
  font-size: 1rem;
}

/* 表单样式 */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1.25rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--text-secondary);
}

.form-group label {
  position: absolute;
  left: 1.25rem;
  top: 1.25rem;
  font-size: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: transform 0.3s var(--ease-out), font-size 0.3s, color 0.3s;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  transform: translateY(-2rem) translateX(-0.5rem);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-primary);
  padding: 0 0.5rem;
}

.btn-submit {
  position: relative;
  overflow: hidden;
}

.btn-submit .btn-loader {
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: var(--bg-primary);
  border-radius: 50%;
  opacity: 0;
}

.btn-submit.loading span {
  opacity: 0;
}

.btn-submit.loading .btn-loader {
  opacity: 1;
  animation: spin 1s linear infinite;
}

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

/* ========================================
   页脚
   ======================================== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* ========================================
   入场动画关键帧
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero 动画延迟 */
.hero .animate-item:nth-child(1) { transition-delay: 0.1s; }
.hero .animate-item:nth-child(2) { transition-delay: 0.2s; }
.hero .animate-item:nth-child(3) { transition-delay: 0.3s; }
.hero .animate-item:nth-child(4) { transition-delay: 0.4s; }
.hero .animate-item:nth-child(5) { transition-delay: 0.5s; }
.hero .animate-item:nth-child(6) { transition-delay: 0.6s; }

/* ========================================
   作品筛选动画
   ======================================== */
.work-card.fade-out {
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

.work-card.fade-in {
  opacity: 1;
  transform: translateY(0);
}