/* ============================================
   轩心华 · Design Portfolio
   Style Sheet
   ============================================ */

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

/* ---- Custom Scrollbar ---- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
  background: transparent;
}

::-webkit-scrollbar-track,
::-webkit-scrollbar-track-piece {
  background: transparent;
  border: none;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

::-webkit-scrollbar-corner {
  background: transparent;
}

html {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.14) transparent;
}

/* ---- Image copy protection ---- */
img {
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
}

.protect-toast {
  position: fixed;
  z-index: 9999;
  padding: 8px 18px;
  background: rgba(0, 0, 0, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-cn);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, 0);
  transition: opacity 0.25s ease;
  white-space: nowrap;
}

.protect-toast.is-visible {
  opacity: 1;
}

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #101018;
  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-tertiary: rgba(255, 255, 255, 0.4);
  --accent-blue: #96c8ff;
  --accent-gold: #EAB308;
  --accent-cyan: #5b9fff;
  --accent-purple: #6d5acb;
  --nav-bg: rgba(10, 10, 15, 0.6);
  --nav-border: rgba(255, 255, 255, 0.06);
  --glass-bg: rgba(255, 255, 255, 0.03);

  --font-en: 'Inter', 'Microsoft YaHei', 'PingFang SC', system-ui, -apple-system, sans-serif;
  --font-cn: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --nav-height: 64px;
  --section-padding: 120px 24px;

  scroll-behavior: smooth;
}

html {
  background: #000000;
  color: var(--text-primary);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
}

/* =============================================
   Navigation
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.3s ease,
              box-shadow 0.3s ease;
}

.nav.hidden {
  transform: translateY(-100%);
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
  box-shadow: 0 1px 24px rgba(0, 229, 255, 0.04);
}

.nav-inner {
  max-width: 1200px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-cyan);
  text-decoration: none;
  letter-spacing: 0.12em;
  text-shadow:
    0 0 10px rgba(0, 229, 255, 0.5),
    0 0 30px rgba(0, 229, 255, 0.2),
    0 0 60px rgba(0, 229, 255, 0.08);
  transition: text-shadow 0.3s ease, color 0.3s ease;
  position: relative;
}

.nav-logo:hover {
  color: #fff;
  text-shadow:
    0 0 12px rgba(0, 229, 255, 0.8),
    0 0 40px rgba(0, 229, 255, 0.35),
    0 0 80px rgba(0, 229, 255, 0.15);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-cn);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.06em;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-cyan), 0 0 16px rgba(0, 229, 255, 0.4);
  transition: width 0.35s cubic-bezier(0.25, 0.8, 0.25, 1.2);
}

.nav-link:hover {
  color: #fff;
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
}

.nav-link:hover::after {
  width: 100%;
}

/* ---- Nav Dropdown ---- */
.nav-item-dropdown {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  list-style: none;
  padding: 8px 0;
  margin: 0;
  background: rgba(10, 10, 18, 0.92);
  border: 1px solid rgba(0, 229, 255, 0.12);
  border-radius: 10px;
  min-width: 170px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow:
    0 4px 32px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(0, 229, 255, 0.04) inset,
    0 0 20px rgba(0, 229, 255, 0.04);
}

.nav-item-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown li {
  margin: 0;
  position: relative;
}

.nav-dropdown a {
  display: block;
  padding: 9px 22px;
  font-family: var(--font-cn);
  font-size: 0.84rem;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s ease;
  position: relative;
  border-left: 2px solid transparent;
}

.nav-dropdown a:hover {
  color: #fff;
  background: rgba(0, 229, 255, 0.06);
  border-left-color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 229, 255, 0.2);
}

/* ============================================
   Hero Section
   ============================================= */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('../assets/bg.jpg') center center / contain no-repeat;
  pointer-events: none;
  z-index: 0;
}

.hero-canvas {
  position: absolute;
  z-index: 0;
  opacity: 0.5;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(
    ellipse 80% 60% at 50% 40%,
    rgba(150, 200, 255, 0.015) 0%,
    rgba(234, 179, 8, 0.008) 40%,
    transparent 70%
  );
  z-index: 1;
}

.hero-svg-text {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
  object-fit: contain;
}

/* ---- Hero Title Text ---- */
.hero-title {
  position: absolute;
  top: 50%;
  left: 8%;
  transform: translateY(-50%);
  z-index: 2;
  pointer-events: none;
  text-align: left;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.hero-line-primary {
  font-family: var(--font-cn);
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.15;
  letter-spacing: 0.12em;
  text-shadow: 0 2px 24px rgba(0,0,0,0.6);
  margin: 0;
}

.hero-line-english {
  font-family: var(--font-en);
  font-size: clamp(1rem, 2.2vw, 1.6rem);
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin: 28px 0 0 0;
  text-shadow: 0 1px 12px rgba(0,0,0,0.4);
}

.hero-line-year {
  font-family: var(--font-en);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  margin: 12px 0 0 0;
  text-shadow: 0 1px 12px rgba(0,0,0,0.4);
}

.hero-line-label {
  font-family: var(--font-cn);
  font-size: clamp(0.9rem, 1.8vw, 1.3rem);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
  margin: 12px 0 0 0;
  text-shadow: 0 1px 12px rgba(0,0,0,0.4);
}

/* ---- Scroll Indicator ---- */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-tertiary);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.scroll-indicator.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(12px);
  pointer-events: none;
}

.scroll-text {
  font-family: var(--font-cn);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
}

.scroll-arrow {
  animation: bounce-scroll 2s ease-in-out infinite;
}

@keyframes bounce-scroll {
  0%, 100% {
    transform: translateY(0);
    opacity: 0.6;
  }
  50% {
    transform: translateY(6px);
    opacity: 1;
  }
}

/* =============================================
   Placeholder Sections (for scroll)
   ============================================= */
.section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--section-padding);
  background: #000000;
}


/* ---- Resume Section ---- */
.section-resume {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  min-height: auto;
  display: block;
}

/* ---- Project Section ---- */
.section-project {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  min-height: auto;
  display: block;
}
.project-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.project-heading {
  font-family: var(--font-cn);
  font-size: clamp(1.5rem, 3.5vw, 2.6rem);
  font-weight: 500;
  color: var(--text-primary);
  text-align: center;
  padding: 48px 24px 0;
  letter-spacing: 0.08em;
}

.project-gallery {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.project-gallery img {
  display: block;
  width: 100%;
  max-width: 1200px;
  margin: 0;
  height: auto;
  background: rgba(255, 255, 255, 0.02);
  animation: img-reveal 0.5s ease-out both;
}

@keyframes img-reveal {
  from {
    opacity: 0;
    filter: blur(4px);
  }
  to {
    opacity: 1;
    filter: blur(0);
  }
}

/* ---- BowenAI GIF Row ---- */
.biaoqing-anchor {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0;
  aspect-ratio: 1920 / 2756;
}

.biaoqing-anchor > img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.biaoqing-gif-row {
  position: absolute;
  top: 55.15%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: none;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: 100%;
  padding: 0;
}

.biaoqing-gif-row img {
  margin: 0;
  width: 9.829%;
  height: auto;
  flex-shrink: 0;
  pointer-events: auto;
}

/* ---- WenWuanFang 10# GIF ---- */
.wenwuanfang-anchor {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  aspect-ratio: 1920 / 1080;
}

.wenwuanfang-anchor > img:first-child {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.wenwuanfang-gif {
  position: absolute;
  left: 30%;
  top: 20%;
  width: 61.04167%;
  z-index: 10;
  pointer-events: none;
}

.wenwuanfang-gif img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: auto;
}
/* ---- JianguanPingTai 13# GIF ---- */
.jianguanpingtai-anchor {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  aspect-ratio: 1920 / 1080;
}

.jianguanpingtai-anchor > img:first-child {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.jianguanpingtai-gif {
  position: absolute;
  bottom: 3.7037%;
  left: 50%;
  transform: translateX(-50%);
  width: 91.5625%;
  z-index: 10;
  pointer-events: none;
}

.jianguanpingtai-gif img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: auto;
}

.resume-image {
  display: block;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  height: auto;
  background: rgba(255, 255, 255, 0.02);
  animation: img-reveal 0.5s ease-out both;
}
.section-alt {
  background: #000000;
}

.section-inner {
  max-width: 1200px;
  width: 100%;
  text-align: center;
}

.section-title {
  font-family: var(--font-cn);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-family: var(--font-cn);
  font-size: 1rem;
  color: var(--text-secondary);
}

.contact-info {
  margin-top: 8px;
}

.contact-link {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.25s ease;
}

.contact-link:hover {
  color: var(--accent-gold);
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 640px) {
  .nav {
    padding: 0 16px;
  }

  .nav-links {
    gap: 20px;
  }

  .nav-link {
    font-size: 0.85rem;
  }

  .scroll-indicator {
    bottom: 28px;
  }

  .section {
    padding: 80px 16px;
  }
}

/* ---- Links underline (global) ---- */
a {
  color: inherit;
}

/* =============================================
   ============================================= */

.comparison-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

.comparison-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1920 / 3011;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  cursor: ew-resize;
  touch-action: none;
  background: var(--bg-primary);
}

.comparison-bottom,
.comparison-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.comparison-bottom img,
.comparison-top img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.comparison-top {
  z-index: 2;
  clip-path: inset(0 50% 0 0);
}

.comparison-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: 3;
  width: 3px;
  transform: translateX(-1.5px);
  pointer-events: none;
}

.comparison-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.35);
}

.comparison-thumb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
}

.comparison-thumb svg {
  display: block;
}

/* ---- Pulse hint animation ---- */
.comparison-wrapper .comparison-thumb {
  animation: comparison-pulse 2.4s ease-in-out infinite;
}
.comparison-wrapper.is-dragging .comparison-thumb,
.comparison-wrapper:active .comparison-thumb {
  animation: none !important;
}

@keyframes comparison-pulse {
  0%, 100% {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35), 0 0 0 0 rgba(255, 255, 255, 0.4);
  }
  50% {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35), 0 0 0 16px rgba(255, 255, 255, 0);
  }
}

.comparison-label {
  text-align: center;
  margin-top: 16px;
  font-family: var(--font-cn);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  letter-spacing: 0.12em;
}

/* ---- active dragging state ---- */
.comparison-wrapper.is-dragging .comparison-thumb {
  transform: translate(-50%, -50%) scale(1.15);
  background: #fff;
  animation: none !important;
}

/* ---- Override section styles when embedded in project ---- */
.section-project .comparison-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

@media (max-width: 768px) {
  .section-project .comparison-inner {
    padding: 40px 0;
  }
  .comparison-thumb {
    width: 36px;
    height: 36px;
  }
  .comparison-thumb svg {
    width: 16px;
    height: 16px;
  }
}