/**
 * 赳赳大秦演艺中心门户 · Grand Stage 落地页
 * 深色默认（设计稿）| 浅色宣纸变体
 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

.portal-app {
  --bg-deep: #0a0a0b;
  --bg-surface: #111113;
  --bg-elevated: #1a1a1e;
  --accent-gold: #c9a84c;
  --accent-gold-dim: rgba(201, 168, 76, 0.15);
  --accent-gold-glow: rgba(201, 168, 76, 0.4);
  --text-primary: #f0ece4;
  --text-secondary: #9e9a93;
  --text-muted: #5a5752;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(201, 168, 76, 0.25);
  --nav-height: 72px;
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, monospace;
}

.portal-app.n-layout--light {
  --bg-deep: #f7f2e8;
  --bg-surface: #fffdf8;
  --bg-elevated: #f3ece0;
  --accent-gold: #9a6640;
  --accent-gold-dim: rgba(154, 102, 64, 0.12);
  --accent-gold-glow: rgba(154, 102, 64, 0.28);
  --text-primary: #2c2418;
  --text-secondary: #6b5f50;
  --text-muted: #9a8f7f;
  --border-subtle: rgba(92, 79, 58, 0.1);
  --border-accent: rgba(154, 102, 64, 0.22);
}

html { scroll-behavior: smooth; }

body.portal-page {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

body.portal-page--fullscreen {
  overflow: hidden;
}

.portal-app {
  position: relative;
  min-height: 100vh;
  background: var(--bg-deep);
  color: var(--text-primary);
}

/* 颗粒纹理 */
.portal-app::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
}

.portal-app.n-layout--light::before {
  opacity: 0.025;
}

.ambient-glow {
  position: fixed;
  top: -30%;
  right: -20%;
  width: 80vw;
  height: 80vw;
  background: radial-gradient(ellipse, var(--accent-gold-dim) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: portalDrift 20s ease-in-out infinite alternate;
}

.portal-app.n-layout--light .ambient-glow {
  top: -20%;
  right: -10%;
  opacity: 0.85;
}

@keyframes portalDrift {
  from { transform: translate(0, 0); }
  to { transform: translate(-5%, 8%); }
}

.portal-landing {
  position: relative;
  z-index: 1;
}

/* ========== 导航 ========== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 4vw;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: color-mix(in srgb, var(--bg-deep) 88%, transparent);
  backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-logo {
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--accent-gold);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 16px;
  color: var(--accent-gold);
  background: var(--accent-gold-dim);
}

.nav-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.08em;
}

.nav-domain {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 400;
  padding: 8px 16px;
  border-radius: 6px;
  transition: all 0.3s ease;
  letter-spacing: 0.02em;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.portal-app.n-layout--light .nav-links a:hover {
  background: rgba(44, 36, 24, 0.05);
}

.nav-links a.active {
  color: var(--accent-gold);
}

.nav-cta {
  background: var(--accent-gold) !important;
  color: var(--bg-deep) !important;
  font-weight: 700 !important;
  font-size: 12.5px !important;
  letter-spacing: 0.06em !important;
  padding: 8px 20px !important;
}

.nav-cta:hover {
  background: color-mix(in srgb, var(--accent-gold) 88%, white) !important;
  box-shadow: 0 0 24px var(--accent-gold-glow);
}

.nav-theme-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.nav-theme-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
  background: var(--accent-gold-dim);
}

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

.menu-toggle span {
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: 0.3s;
}

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: var(--nav-height) 6vw 0;
  position: relative;
  gap: 4vw;
}

.hero-content {
  padding: 4vh 0;
  z-index: 1;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-headline {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(38px, 5.5vw, 72px);
  line-height: 1.15;
  margin-bottom: 28px;
}

.hero-headline .accent {
  color: var(--accent-gold);
  position: relative;
}

.hero-headline .accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gold);
  opacity: 0.3;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 16px;
}

.hero-hint {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 32px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--accent-gold-dim);
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent-gold);
  color: var(--bg-deep);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
  padding: 14px 32px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background: color-mix(in srgb, var(--accent-gold) 88%, white);
  box-shadow: 0 4px 32px var(--accent-gold-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  padding: 14px 24px;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
  background: var(--accent-gold-dim);
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual-inner {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--bg-elevated) 0%, color-mix(in srgb, var(--bg-surface) 80%, var(--bg-deep)) 50%, var(--bg-surface) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 40%, var(--accent-gold-dim) 0%, transparent 60%);
}

.hero-visual-icon {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 120px;
  color: var(--accent-gold);
  opacity: 0.12;
  user-select: none;
}

.hero-visual-clock {
  position: absolute;
  top: 24px;
  left: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 1;
}

.hero-visual-day {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-gold);
  line-height: 1;
}

.hero-visual-time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.hero-visual-label {
  position: absolute;
  bottom: 20px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 15%;
  left: 50%;
  width: 1px;
  height: 200px;
  background: linear-gradient(to bottom, transparent, var(--border-accent), transparent);
  opacity: 0.4;
}

/* ========== 服务分组 ========== */
.services {
  padding: 80px 6vw;
  position: relative;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 24px;
  gap: 16px;
}

.section-header--compact {
  margin-bottom: 28px;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-gold);
  letter-spacing: 0.2em;
  min-width: 48px;
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 3vw, 36px);
  flex: 1;
}

.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border-subtle), transparent);
  margin: 0 16px;
  min-width: 40px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 2px;
}

.service-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.35s ease;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font: inherit;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--accent-gold), transparent);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.service-card:hover,
.service-card--active {
  background: var(--bg-elevated);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.service-card:hover::before,
.service-card--active::before {
  opacity: 1;
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  border-radius: 10px;
  background: var(--accent-gold-dim);
  border: 1px solid var(--border-accent);
  color: var(--accent-gold);
}

.service-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.service-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  pointer-events: none;
  transition: gap 0.3s ease;
}

.service-card:hover .service-link {
  gap: 12px;
}

/* ========== 子系统条带 ========== */
.platform-strip {
  padding: 80px 6vw;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.platform-strip-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 16px;
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  background: var(--bg-deep);
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s ease;
  cursor: pointer;
  font: inherit;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  text-align: left;
}

.platform-item:hover,
.platform-item--active {
  border-color: var(--border-accent);
  background: var(--bg-elevated);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.portal-app.n-layout--light .platform-item:hover,
.portal-app.n-layout--light .platform-item--active {
  box-shadow: 0 8px 28px rgba(44, 36, 24, 0.08);
}

.platform-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--accent-gold-dim);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  flex-shrink: 0;
}

.platform-info h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 3px;
}

.platform-info p {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ========== 关于 ========== */
.about {
  padding: 100px 6vw;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 8vw;
  align-items: center;
}

.about-left .section-number {
  display: block;
  margin-bottom: 16px;
}

.about-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.2;
  margin-bottom: 24px;
}

.about-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 32px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 400;
  color: var(--accent-gold);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.about-right {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}

.about-right::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-gold-dim) 0%, transparent 70%);
  pointer-events: none;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.contact-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 24px;
  margin-bottom: 24px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.contact-method:last-child {
  border-bottom: none;
}

.contact-icon {
  font-size: 20px;
  width: 32px;
  text-align: center;
  flex-shrink: 0;
}

.contact-detail {
  flex: 1;
  min-width: 0;
}

.contact-detail .label {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

.contact-detail .value {
  font-family: var(--font-mono);
  font-size: 13px;
  word-break: break-all;
}

/* ========== 页脚 ========== */
.site-foot {
  padding: 48px 6vw;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  width: 28px;
  height: 28px;
  border: 1px solid var(--accent-gold);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 12px;
  color: var(--accent-gold);
  background: var(--accent-gold-dim);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a,
.footer-link-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 12px;
  transition: color 0.3s;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}

.footer-links a:hover,
.footer-link-btn:hover {
  color: var(--accent-gold);
}

/* ========== 加载 / 错误 ========== */
.portal-loading,
.portal-error {
  padding: 48px 6vw;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.portal-error {
  color: #d47a7a;
}

/* ========== 嵌入工作区 ========== */
.portal-workspace {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  flex-direction: column;
  background: var(--bg-deep);
}

.portal-workspace[hidden] {
  display: none !important;
}

.portal-workspace-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  flex-shrink: 0;
}

.portal-workspace-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.portal-workspace-label {
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.portal-workspace-title strong {
  font-size: 14px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.portal-workspace-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.portal-bar-btn {
  min-height: 36px;
  padding: 0 14px;
  border-radius: 6px;
  border: 1px solid var(--accent-gold);
  background: var(--accent-gold);
  color: var(--bg-deep);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}

.portal-bar-btn:hover {
  opacity: 0.92;
}

.portal-bar-btn--ghost {
  background: transparent;
  color: var(--accent-gold);
  border-color: var(--border-accent);
}

.portal-frame-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  background: #fff;
}

.portal-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

.portal-frame-tip {
  margin: 0;
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--accent-gold-dim);
  border-top: 1px solid var(--border-accent);
  line-height: 1.5;
  flex-shrink: 0;
}

.portal-app--frame-fullscreen .portal-landing {
  display: none;
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: calc(var(--nav-height) + 24px);
    min-height: auto;
    gap: 40px;
    padding-bottom: 60px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual-inner {
    max-width: 100%;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: color-mix(in srgb, var(--bg-deep) 97%, transparent);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    align-items: stretch;
  }

  .nav-links.open li {
    width: 100%;
  }

  .nav-links.open a,
  .nav-links.open .nav-theme-btn {
    width: 100%;
    justify-content: center;
  }

  .menu-toggle {
    display: flex;
  }

  .about-stats {
    gap: 16px;
  }

  .stat-value {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: 32px;
  }

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

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

  .section-line {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ambient-glow {
    animation: none;
  }

  .service-card,
  .platform-item,
  .btn-primary {
    transition: none;
  }

  .service-card:hover,
  .platform-item:hover,
  .btn-primary:hover {
    transform: none;
  }
}