/* ============================================
   Whank 个人主页 - 高级样式表
   Neo Kinpaku 设计风格
   ============================================ */

/* ---------- CSS 自定义属性 ---------- */
:root {
  --color-bg: oklch(7% 0.006 95);
  --color-bg-deep: oklch(4% 0.004 95);
  --color-surface: oklch(11% 0.006 95);
  --color-surface-raised: oklch(14% 0.008 95);
  --color-surface-hover: oklch(17% 0.008 95);
  
  --color-accent: oklch(84% 0.19 80);
  --color-accent-pale: oklch(86% 0.07 84);
  --color-accent-deep: oklch(61% 0.085 78);
  --color-accent-glow: oklch(84% 0.19 80 / 0.15);
  
  --color-secondary: oklch(70% 0.12 188);
  --color-secondary-pale: oklch(82% 0.07 188);
  
  --color-text: oklch(88% 0 0);
  --color-text-bright: oklch(94% 0 0);
  --color-text-muted: oklch(62% 0 0);
  --color-text-faint: oklch(50% 0 0);
  
  --color-border: oklch(78% 0 0 / 0.1);
  --color-border-accent: oklch(74% 0.09 82 / 0.4);
  --color-border-light: oklch(78% 0 0 / 0.06);

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --font-display: 'Alumni Sans', 'Albert Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Albert Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 800ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg-deep);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-deep); }
::-webkit-scrollbar-thumb {
  background: var(--color-border-accent);
  border-radius: var(--radius-full);
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}
a:hover { color: var(--color-accent-pale); }

/* ---------- 粒子背景 ---------- */
#particles-canvas {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(180deg, var(--color-bg) 60%, transparent);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.navbar.scrolled {
  background: oklch(7% 0.006 95 / 0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  padding: 0.6rem 2rem;
  border-bottom: 1px solid var(--color-border);
}

.navbar-brand {
  display: flex; align-items: center; gap: 0.75rem;
}

.brand-mark {
  width: 32px; height: 32px;
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  transition: transform var(--duration-normal) var(--ease-spring);
}
.brand-mark:hover { transform: rotate(90deg); }

.brand-wordmark {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--color-text-bright);
  text-transform: uppercase;
}

.nav-links {
  display: flex; align-items: center; gap: 2rem; list-style: none;
}

.nav-links a {
  font-size: 0.85rem; font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  position: relative; padding: 0.25rem 0;
  transition: color var(--duration-fast) ease;
}

.nav-links a::after {
  content: '';
  position: absolute; bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.nav-links a:hover { color: var(--color-text-bright); }
.nav-links a:hover::after { width: 100%; }

.menu-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer; background: none; border: none; padding: 4px; z-index: 101;
}

.menu-toggle span {
  display: block; width: 24px; height: 1.5px;
  background: var(--color-text-bright);
  transition: all var(--duration-normal) var(--ease-out-expo);
  border-radius: 2px;
}

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

/* =====================================
   HERO - 左右布局 + 弧形图片轮播
   ===================================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 6rem 2rem 4rem;
  max-width: 1400px;
  margin: 0 auto;
  gap: 2rem;
}

/* --- 左侧文字 --- */
.hero-left {
  padding-right: 2rem;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-secondary);
  border: 1px solid var(--color-secondary-pale);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.hero-badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-secondary);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 5.5rem);
  font-weight: 100;
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--color-text-bright);
  margin-bottom: 1.2rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.4s forwards;
}

.hero-title .accent-word {
  color: var(--color-accent);
  font-weight: 200;
  position: relative;
  display: inline-block;
}

.hero-title .accent-word::after {
  content: '';
  position: absolute; bottom: 4px; left: 0; right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  animation: expandLine 1s var(--ease-out-expo) 1.2s forwards;
}

@keyframes expandLine {
  to { transform: scaleX(1); }
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  min-height: 2.8em;
  display: flex;
  align-items: center;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.6s forwards;
}

.hero-subtitle .typewriter-wrap {
  display: inline-block;
  position: relative;
  text-align: center;
  min-width: 1ch;
}

.hero-subtitle .typewriter-wrap::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--color-accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink-caret 0.75s step-end infinite;
}

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

.hero-desc {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.7s forwards;
}

.hero-actions {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.8s forwards;
}

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: var(--font-body);
  font-size: 0.9rem; font-weight: 500;
  border: none; border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative; overflow: hidden;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg-deep);
}
.btn-primary:hover {
  background: var(--color-accent-pale);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px var(--color-accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-border-accent);
}
.btn-secondary:hover {
  background: var(--color-accent-glow);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* 技术标签行 */
.hero-tech-tags {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.9s forwards;
}

.hero-tech-tag {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition: all var(--duration-fast) ease;
}

.hero-tech-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-glow);
  transform: translateY(-2px);
}

/* --- 右侧：弧形图片矩阵 --- */
.hero-right {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  height: 70vh;
  min-height: 420px;
}

.arc-carousel {
  position: relative;
  width: 100%;
  height: 100%;
}

.arc-item {
  position: absolute;
  width: 160px;
  height: 112px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  cursor: pointer;
  transition: all 0.6s var(--ease-out-expo);
  will-change: transform, opacity, filter;
}

.arc-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* —— 居中放大状态 —— */
.arc-item.active {
  width: 220px;
  height: 154px;
  z-index: 10;
  border-color: var(--color-accent);
  box-shadow: 0 0 30px var(--color-accent-glow), 0 8px 40px rgba(0,0,0,0.6);
  filter: none !important;
  opacity: 1 !important;
}

/* —— 其他虚化 —— */
.arc-item.blurred {
  filter: brightness(0.35) saturate(0.3);
  opacity: 0.6;
}

/* 中心标签 */
.arc-label {
  position: absolute;
  bottom: 15%;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-full);
  background: oklch(7% 0.006 95 / 0.7);
  backdrop-filter: blur(8px);
  white-space: nowrap;
  z-index: 5;
  pointer-events: none;
}

/* 滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 1.2s forwards;
}

.scroll-indicator span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.scroll-mouse {
  width: 22px; height: 34px;
  border: 1.5px solid var(--color-border-accent);
  border-radius: 12px;
  position: relative;
}

.scroll-mouse::after {
  content: '';
  position: absolute; top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 2px; height: 6px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scrollMouse 2s ease-in-out infinite;
}

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

/* ---------- 其余 Section ---------- */
.section {
  position: relative; z-index: 1;
  padding: var(--space-2xl) 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 300; line-height: 1.04;
  color: var(--color-text-bright);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.about-image-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
  color: var(--color-accent);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-raised) 100%);
}

.about-image-wrapper::after {
  content: '';
  position: absolute; inset: 0;
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-lg);
  opacity: 0.3;
}

.about-content h3 {
  font-family: var(--font-display);
  font-size: 1.8rem; font-weight: 300;
  color: var(--color-text-bright);
  margin-bottom: 1.5rem;
}

.about-content p {
  color: var(--color-text);
  margin-bottom: 1.2rem;
  line-height: 1.8;
}

.skills-cloud {
  display: flex; flex-wrap: wrap; gap: 0.6rem;
  margin-top: 2rem;
}

.skill-tag {
  padding: 0.4rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--color-accent);
  transition: all var(--duration-fast) ease;
}

.skill-tag:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
  transform: translateY(-2px);
}

/* 链接 */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.link-card {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out-expo);
  cursor: pointer;
}

.link-card:hover {
  border-color: var(--color-border-accent);
  background: var(--color-surface-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.link-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-accent-glow);
  color: var(--color-accent);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.link-info { flex: 1; min-width: 0; }
.link-info h4 {
  font-size: 0.95rem; font-weight: 500;
  color: var(--color-text-bright);
  margin-bottom: 0.15rem;
}
.link-info p {
  font-size: 0.8rem; color: var(--color-text-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.link-arrow {
  color: var(--color-text-faint);
  font-size: 0.85rem;
  transition: all var(--duration-fast) ease;
  flex-shrink: 0;
}
.link-card:hover .link-arrow {
  color: var(--color-accent);
  transform: translateX(3px);
}

/* 项目 */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.project-card:hover {
  border-color: var(--color-border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.project-card-image {
  height: 180px;
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-raised) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-card-image .project-icon {
  font-size: 2.5rem;
  color: var(--color-accent);
  opacity: 0.6;
}

.project-card-image .project-category {
  position: absolute; top: 1rem; right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-accent);
}

.project-card-body { padding: 1.5rem; }
.project-card-body h3 {
  font-size: 1.1rem; font-weight: 500;
  color: var(--color-text-bright);
  margin-bottom: 0.5rem;
}
.project-card-body p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.project-tech {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
}

.project-tech span {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

/* 联系 */
.contact-section {
  text-align: center;
  padding: var(--space-2xl) 2rem;
  max-width: 600px;
  margin: 0 auto;
  position: relative; z-index: 1;
}

.contact-section p {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.contact-email {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 1rem 2rem;
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  font-size: 1rem;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.contact-email:hover {
  background: var(--color-accent-glow);
  transform: translateY(-2px);
}

/* 页脚 */
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--color-border);
  padding: 3rem 2rem;
  text-align: center;
  background: var(--color-bg-deep);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.2rem; font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--color-text-faint);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

.footer-divider {
  width: 40px; height: 1px;
  background: var(--color-border-accent);
  margin: 1.5rem auto;
}

/* ---------- 动画 ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s var(--ease-out-expo);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 5rem 1.25rem 2rem;
    gap: 1.5rem;
  }
  .hero-left { padding-right: 0; }
  .hero-content { margin: 0 auto; }
  .hero-subtitle { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-tech-tags { justify-content: center; }
  .hero-right { height: 50vh; min-height: 320px; }
  .arc-item { width: 130px; height: 91px; }
  .arc-item.active { width: 180px; height: 126px; }
}

@media (max-width: 768px) {
  .navbar { padding: 0.8rem 1.25rem; }

  .nav-links {
    position: fixed; top: 0; right: -100%;
    width: 70%; height: 100vh;
    flex-direction: column; justify-content: center;
    background: oklch(7% 0.006 95 / 0.98);
    backdrop-filter: blur(20px);
    transition: right var(--duration-normal) var(--ease-out-expo);
    gap: 2.5rem;
  }

  .nav-links.open { right: 0; }
  .nav-links a { font-size: 1.1rem; }
  .menu-toggle { display: flex; }

  .hero {
    padding: 5rem 1.25rem 2rem;
  }

  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .hero-right { height: 40vh; min-height: 260px; }
  .arc-item { width: 100px; height: 70px; }
  .arc-item.active { width: 140px; height: 98px; }

  .section { padding: var(--space-xl) 1.25rem; }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .about-image-wrapper { aspect-ratio: 3/2; max-width: 400px; margin: 0 auto; }
  .projects-grid { grid-template-columns: 1fr; }
  .links-grid { grid-template-columns: 1fr; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .about-grid { gap: var(--space-lg); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}