/* ============================================
   VOID STUDIO - 主样式文件
   深色极简 + 霓虹点缀
   ============================================ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #080810;
  --bg-1: #0d0d1a;
  --bg-2: #111128;
  --surface: rgba(255,255,255,0.04);
  --surface-hover: rgba(255,255,255,0.08);
  --border: rgba(255,255,255,0.08);
  --border-glow: rgba(168,85,247,0.3);

  --purple: #a855f7;
  --purple-light: #c084fc;
  --purple-dim: rgba(168,85,247,0.15);
  --cyan: #06b6d4;
  --cyan-light: #22d3ee;
  --cyan-dim: rgba(6,182,212,0.15);
  --gold: #f59e0b;

  --text: #f0f0f8;
  --text-muted: #8888aa;
  --text-faint: #44445a;

  --serif: 'Noto Serif SC', serif;
  --sans: 'Space Grotesk', 'Inter', sans-serif;

  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 粒子画布 */
#particles-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

/* 选中样式 */
::selection {
  background: var(--purple-dim);
  color: var(--purple-light);
}

/* ---- 导航 ---- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 60px;
  transition: var(--transition);
}

#navbar.scrolled {
  background: rgba(8,8,16,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 60px;
}

.nav-logo {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.logo-text { color: var(--text); }
.logo-dot { color: var(--purple); margin: 0 2px; }
.logo-sub { color: var(--text-muted); font-weight: 300; }

.nav-links {
  display: flex;
  list-style: none;
  gap: 40px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--purple);
  transition: width var(--transition);
}

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

.nav-cta {
  background: transparent;
  border: 1px solid var(--purple);
  color: var(--purple);
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: var(--sans);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.05em;
}

.nav-cta:hover {
  background: var(--purple);
  color: white;
  box-shadow: 0 0 20px rgba(168,85,247,0.4);
}

/* ---- Hero ---- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 120px 60px 60px;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(168,85,247,0.12) 0%, transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -200px; left: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(168,85,247,0.1);
  border: 1px solid rgba(168,85,247,0.25);
  color: var(--purple-light);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  margin-bottom: 30px;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.2s forwards;
}

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

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

.hero-title {
  font-family: var(--serif);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 24px;
}

.title-line {
  display: block;
  opacity: 0;
  animation: fadeUp 0.8s ease forwards;
}

.title-line:nth-child(1) { animation-delay: 0.4s; }
.title-line:nth-child(2) { animation-delay: 0.55s; }
.title-line:nth-child(3) { animation-delay: 0.7s; }

.title-line.accent {
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.85s forwards;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
  opacity: 0;
  animation: fadeUp 0.8s ease 1s forwards;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--purple), var(--cyan));
  color: white;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: var(--sans);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(168,85,247,0.4);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-muted);
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 400;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--purple);
  background: var(--purple-dim);
}

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

.hero-scroll {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  opacity: 0;
  animation: fadeUp 0.8s ease 1.2s forwards;
}

.hero-scroll span {
  font-size: 0.75rem;
  color: var(--text-faint);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--purple), transparent);
  animation: scrollDrop 2s ease-in-out infinite;
}

@keyframes scrollDrop {
  0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
  50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  width: 420px;
  height: 420px;
  flex-shrink: 0;
  margin-left: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visual-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  animation: ringRotate linear infinite;
}

.ring-1 {
  width: 280px; height: 280px;
  border-color: rgba(168,85,247,0.3);
  animation-duration: 20s;
}

.ring-2 {
  width: 360px; height: 360px;
  border-color: rgba(6,182,212,0.2);
  border-style: dashed;
  animation-duration: 30s;
  animation-direction: reverse;
}

.ring-3 {
  width: 420px; height: 420px;
  border-color: rgba(168,85,247,0.1);
  animation-duration: 45s;
}

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

.visual-core {
  position: relative;
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(168,85,247,0.2), rgba(6,182,212,0.1));
  border-radius: 50%;
  border: 1px solid rgba(168,85,247,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 60px rgba(168,85,247,0.2), inset 0 0 40px rgba(168,85,247,0.1);
}

.core-text {
  font-family: var(--serif);
  font-size: 3.5rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--purple-light), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- 跑马灯 ---- */
.marquee-wrap {
  position: relative;
  z-index: 1;
  overflow: hidden;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(168,85,247,0.03);
}

.marquee-track {
  display: flex;
  gap: 32px;
  white-space: nowrap;
  animation: marquee 20s linear infinite;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.marquee-track .sep {
  color: var(--purple);
  font-size: 0.6rem;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---- 公共 section 样式 ---- */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
}

section {
  position: relative;
  z-index: 1;
  padding: 100px 0;
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--purple);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
}

.section-title em {
  font-style: normal;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ---- 关于 ---- */
#about { background: var(--bg-1); }

.about-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 80px;
  align-items: center;
}

.about-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

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

.card-glow {
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(168,85,247,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.card-inner { padding: 40px; }

.avatar-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.avatar-placeholder {
  width: 100px; height: 100px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.avatar-placeholder svg {
  width: 70%;
  height: 70%;
}

.card-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

.stat-num {
  display: block;
  font-family: var(--sans);
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

.about-desc {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 16px;
}

.tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.tag {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  transition: var(--transition);
  cursor: default;
}

.tag:hover {
  border-color: var(--purple);
  color: var(--purple-light);
  background: var(--purple-dim);
}

/* ---- 作品 ---- */
#work { background: var(--bg); }

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 280px 280px;
  gap: 16px;
}

.work-item { border-radius: var(--radius); overflow: hidden; cursor: pointer; }

.work-large { grid-column: span 2; }

.work-img {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.work-img:hover { transform: scale(1.02); }

.work-deco {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--serif);
  font-size: 5rem;
  font-weight: 600;
  color: rgba(255,255,255,0.06);
  pointer-events: none;
  transition: var(--transition);
}

.work-img:hover .work-deco {
  color: rgba(255,255,255,0.12);
  transform: translate(-50%, -50%) scale(1.1);
}

.work-overlay {
  position: absolute;
  inset: 0;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,0.7) 100%);
  opacity: 0;
  transition: var(--transition);
}

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

.work-num {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.5);
}

.work-meta h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: white;
}

.work-meta p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

.work-arrow {
  position: absolute;
  top: 24px; right: 24px;
  color: white;
  font-size: 1.2rem;
  transform: translateX(-8px);
  transition: var(--transition);
}

.work-img:hover .work-arrow { transform: translateX(0); }

/* ---- 服务 ---- */
#services { background: var(--bg-1); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(168,85,247,0.1);
}

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

.service-card.featured {
  background: linear-gradient(135deg, rgba(168,85,247,0.1), rgba(6,182,212,0.05));
  border-color: rgba(168,85,247,0.3);
}

.service-badge {
  display: inline-block;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  color: white;
  font-size: 0.65rem;
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.service-icon {
  font-size: 2rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.service-card p {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-tags span {
  font-size: 0.72rem;
  color: var(--purple-light);
  background: var(--purple-dim);
  padding: 3px 10px;
  border-radius: 100px;
}

/* ---- 引言 ---- */
#quote {
  background: var(--bg);
  padding: 80px 0;
}

.quote-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 60px;
  text-align: center;
}

.quote-line {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  margin: 0 auto 40px;
}

#quote-text {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 300;
  line-height: 1.8;
  color: var(--text-muted);
  font-style: italic;
  quotes: none;
}

.quote-author {
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}

/* ---- 联系 ---- */
#contact { background: var(--bg-1); }

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 20px 0 36px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.contact-link:hover { color: var(--purple-light); }
.contact-link:hover .link-icon { color: var(--purple); }

.link-icon {
  font-size: 1rem;
  color: var(--text-faint);
  transition: var(--transition);
  width: 20px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--purple);
  background: rgba(168,85,247,0.05);
  box-shadow: 0 0 0 3px rgba(168,85,247,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-faint);
}

.form-group select option {
  background: #1a1a2e;
  color: var(--text);
}

.form-group textarea { resize: vertical; min-height: 120px; }

/* ---- 页脚 ---- */
#footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 60px 0 40px;
  background: var(--bg);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
  text-align: center;
}

.footer-logo {
  font-family: var(--sans);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.footer-logo span { color: var(--purple); margin: 0 4px; }

.footer-tagline {
  font-family: var(--serif);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  font-style: italic;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-links a {
  color: var(--text-faint);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--purple-light); }

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-faint);
}

/* ---- 动画 ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  #navbar { padding: 20px 30px; }
  #navbar.scrolled { padding: 14px 30px; }
  .section-container { padding: 0 30px; }
  #hero { padding: 120px 30px 60px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .work-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .work-large { grid-column: span 1; }
  .work-item { height: 220px; }
  .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.5rem; }
  .footer-links { flex-wrap: wrap; gap: 20px; }
}