/* ==========================================================================
   Layout / Nav / Hero / Sidebar — 黑白玻璃态
   ========================================================================== */

/* ============= Nav ============= */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--bg-overlay);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  position: relative;
  min-height: var(--nav-height);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: 2px;
  text-decoration: none;
}

.nav-brand .brand-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
}

.nav-brand-mark {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--text-primary);
}

.nav-brand-divider {
  width: 2px;
  height: 18px;
  background: var(--text-primary);
  flex-shrink: 0;
  opacity: 1;
}

.nav-brand .brand-sub,
.nav-brand-sub {
  font-size: 18px;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links > li { list-style: none; }

.nav-links a {
  display: inline-block;
  padding: 0;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-radius: 0;
  text-decoration: none;
  transition: color 0.3s ease;
  background: transparent;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: transparent;
}

.nav-links a.active {
  color: var(--text-primary);
  background: transparent;
  box-shadow: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-decoration: none;
  transition: all 0.3s ease;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-cta:hover {
  border-color: var(--border-hover);
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  color: var(--text-primary);
  cursor: pointer;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  flex-shrink: 0;
}

.nav-toggle:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-strong);
}

/* ============= Admin / Ops Nav (sidebar) ============= */
.admin-nav,
.ops-nav,
.webmail-nav {
  background: var(--bg-overlay);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
}

/* ============= Hero（对齐参考落地页） ============= */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 140px 24px 80px;
  position: relative;
  z-index: 1;
  overflow: hidden;
  background: var(--bg);
}

/* 首页密集首屏：文案左 + 产品预览右（主体放大） */
.hero.hero-dense {
  min-height: calc(100dvh - 100px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  align-items: center;
  justify-content: stretch;
  text-align: left;
  max-width: 1480px;
  margin: 0 auto;
  padding: 88px 40px 48px;
  gap: 56px;
  width: 100%;
  box-sizing: border-box;
}

.hero-dense .hero-glow {
  left: 28%;
  width: 720px;
  height: 720px;
}

.hero-dense .hero-copy {
  position: relative;
  z-index: 1;
  max-width: none;
  margin: 0;
  text-align: left;
}

.hero-dense .hero-badge {
  margin-bottom: 28px;
  font-size: 12px;
  padding: 10px 20px;
}

.hero-dense .hero-title {
  font-size: clamp(56px, 7.2vw, 108px);
  margin-bottom: 18px;
  letter-spacing: -3px;
}

.hero-dense .hero-title .line2 {
  letter-spacing: 5px;
  margin-top: 14px;
  font-size: 0.3em;
}

.hero-dense .hero-desc {
  margin: 0 0 32px;
  max-width: 520px;
  font-size: 17px;
  line-height: 1.75;
  text-align: left;
}

.hero-dense .hero-form {
  margin: 0;
  max-width: 520px;
}

.hero-dense .hero-input {
  padding: 18px 22px;
  font-size: 15px;
  border-radius: 12px;
}

.hero-dense .hero-submit {
  padding: 18px 32px;
  font-size: 14px;
  border-radius: 12px;
}

.hero-dense .hero-hint {
  text-align: left;
  margin-top: 18px;
  font-size: 13px;
}

.hero-dense .hero-hint a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hero-dense .hero-hint a:hover { color: var(--text-primary); }

.hero-preview {
  width: 100%;
  max-width: none;
  margin: 0;
  text-align: left;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  z-index: 1;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.5);
}

.hero-preview-chrome {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}

.hero-preview-chrome .demo-title {
  font-size: 13px;
}

.hero-preview-link {
  margin-left: auto;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  text-decoration: none;
}

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

.hero-preview-body {
  padding: 16px 20px 12px;
}

.hero-preview .email-item {
  padding: 18px 10px;
  gap: 16px;
}

.hero-preview .email-avatar {
  width: 44px;
  height: 44px;
  font-size: 15px;
}

.hero-preview .email-sender {
  font-size: 14px;
}

.hero-preview .email-time {
  font-size: 12px;
}

.hero-preview .email-subject {
  font-size: 15px;
  margin-bottom: 8px;
  line-height: 1.45;
}

.hero-preview .email-ai-tag {
  font-size: 12px;
  padding: 6px 10px;
}

.email-ai-tag-risk {
  border-color: rgba(255, 255, 255, 0.22) !important;
  color: var(--text-primary) !important;
}

.site-nav {
  max-width: 720px;
  margin: 0 auto 48px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.25s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text-primary);
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 60%);
  pointer-events: none;
  animation: glowPulse 6s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge,
.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 48px;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero-badge::before,
.hero-status::before {
  display: none;
}

.hero-badge-dot {
  width: 5px;
  height: 5px;
  background: #fff;
  border-radius: 50%;
  animation: dotPulse 2.5s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(48px, 10vw, 140px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -3px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
  color: var(--text-primary);
}

.hero-title .line1 {
  display: block;
  background: linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.6) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title .line2 {
  display: block;
  font-size: 0.35em;
  font-weight: 400;
  letter-spacing: 8px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 16px;
  -webkit-text-fill-color: var(--text-muted);
}

.hero-title .gradient-text,
.hero-title .highlight {
  background: linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.6) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

.hero-desc,
.hero-subtitle {
  max-width: 520px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0 auto 48px;
  font-weight: 400;
}

.hero-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  width: 100%;
  position: relative;
  z-index: 1;
  margin: 0 auto;
}

.hero-input-wrap {
  flex: 1;
  position: relative;
}

.hero-input {
  width: 100%;
  padding: 16px 20px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero-input::placeholder { color: var(--text-muted); }

.hero-input:focus {
  border-color: var(--border-hover);
  background: var(--bg-glass-hover);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
}

.hero-submit {
  padding: 16px 28px;
  background: var(--text-primary);
  color: var(--bg);
  border: none;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  font-family: inherit;
}

.hero-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.15);
}

.hero-hint {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero-cta {
  display: flex;
  gap: var(--space-2);
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-2);
  background: var(--panel);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-xl);
}

.hero-stats { display: none; }

/* ============= Section ============= */
.section {
  padding: 72px 24px;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-12);
}

.section-title {
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.section-subtitle {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
}

/* ============= Grid ============= */
.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============= Features Grid ============= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

@media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }

/* ============= Feature Card ============= */
.feature-card {
  background: var(--panel);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-inset-glass), var(--shadow);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-glass);
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

.feature-card:hover {
  background: var(--panel-2);
  border-color: var(--glass-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-inset-glass), var(--shadow-md), var(--shadow-glow);
}

.feature-card:hover::before { opacity: 0.5; }

.feature-title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.feature-desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
}

/* ============= Pricing ============= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  max-width: 1100px;
  margin: 0 auto;
}

@media (max-width: 900px) { .pricing-grid { grid-template-columns: 1fr; } }

.pricing-card {
  background: var(--panel);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-inset-glass), var(--shadow);
  position: relative;
  transition: all var(--transition-slow);
}

.pricing-card:hover {
  border-color: var(--glass-border-strong);
  background: var(--panel-2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-inset-glass), var(--shadow-lg), var(--shadow-glow);
}

.pricing-card.featured {
  background: var(--panel-2);
  border-color: var(--glass-border-strong);
  box-shadow:
    var(--shadow-inset-glass),
    var(--shadow-md),
    var(--shadow-glow);
}

.pricing-name {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.pricing-price {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.03em;
}

.pricing-price-tba {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

.pricing-price .unit {
  font-size: var(--fs-base);
  font-weight: var(--fw-normal);
  color: var(--text-muted);
}

.pricing-desc {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-6);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.pricing-features li {
  padding: 8px 0;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pricing-features li::before {
  content: "+";
  color: var(--text-primary);
  font-weight: bold;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--glass-bg-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  flex-shrink: 0;
}

/* ============= Footer ============= */
.footer,
.site-footer {
  border-top: 1px solid var(--glass-border);
  padding: 60px 24px 30px;
  background: var(--bg-overlay);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.site-footer { margin-top: var(--space-16); }

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.footer-desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
  max-width: 320px;
}

.footer-col h4 {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: var(--space-2); }

.footer-col a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

/* ============= Glow / Decoration ============= */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

.glow-orb.white { background: rgba(255, 255, 255, 0.10); }
.glow-orb.dark  { background: rgba(255, 255, 255, 0.05); }

/* ============= Auth Pages ============= */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.auth-card {
  max-width: 440px;
  width: 100%;
  background: var(--panel);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-inset-glass), var(--shadow-lg);
}

.auth-title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  text-align: center;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.auth-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  font-size: var(--fs-sm);
}

.auth-footer {
  text-align: center;
  margin-top: var(--space-5);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.auth-footer a {
  color: var(--text-primary);
  font-weight: var(--fw-medium);
}

/* ============= App Layout (Dashboard / Admin / Ops / Webmail) ============= */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

@media (max-width: 1024px) {
  .app-layout { grid-template-columns: 1fr; }
}

.sidebar,
.admin-sidebar,
.ops-sidebar {
  background: var(--sidebar-bg);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  backdrop-filter: blur(24px) saturate(160%);
  border-right: 1px solid var(--glass-border);
  padding: var(--space-5);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.admin-sidebar,
.ops-sidebar { padding-top: var(--space-4); }

.sidebar-brand,
.admin-sidebar .nav-brand,
.ops-sidebar .nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--glass-border);
}

.sidebar-section { margin-bottom: var(--space-6); }

.sidebar-section-title,
.admin-menu-title,
.ops-menu-title {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
  padding: 0 var(--space-3);
  font-weight: var(--fw-semibold);
}

.sidebar-link,
.admin-menu-item,
.ops-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 8px 12px;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--transition);
  margin-bottom: 2px;
  cursor: pointer;
}

.sidebar-link:hover,
.admin-menu-item:hover,
.ops-menu-item:hover {
  background: var(--hover);
  color: var(--text-primary);
}

.sidebar-link.active,
.admin-menu-item.active,
.ops-menu-item.active {
  background: var(--panel-2);
  color: var(--text-primary);
  box-shadow: var(--shadow-inset-glass);
}

.admin-menu-item .badge,
.ops-menu-item .badge {
  margin-left: auto;
  font-size: 10px;
  padding: 2px 6px;
}

.app-main,
.admin-main,
.ops-main {
  padding: var(--space-6);
  min-width: 0;
}

.app-header,
.admin-header,
.ops-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.app-title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.app-subtitle {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  margin-top: 4px;
}

/* ============= Step Indicator ============= */
.steps {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  position: relative;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  position: relative;
  z-index: 1;
}

.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  font-size: var(--fs-sm);
  transition: all var(--transition);
}

.step.active .step-num {
  background: var(--primary);
  color: var(--primary-text-on);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.10);
}

.step.done .step-num {
  background: var(--panel-2);
  color: var(--text-primary);
  border-color: var(--glass-border-strong);
}

.step-label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: var(--space-2);
  text-align: center;
}

.step.active .step-label,
.step.done .step-label { color: var(--text-primary); }

.steps::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  height: 1px;
  background: var(--glass-border);
  z-index: 0;
}

/* ============= FAQ ============= */
.faq-item {
  background: var(--panel);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  margin-bottom: var(--space-3);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover { border-color: var(--glass-border-strong); }

.faq-q {
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: var(--fs-sm);
}

.faq-q::after {
  content: "+";
  font-size: var(--fs-xl);
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item.open .faq-q::after { transform: rotate(45deg); }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
}

.faq-item.open .faq-a {
  max-height: 400px;
  padding: 0 var(--space-5) var(--space-5);
}

/* ============= About Timeline ============= */
.about-timeline {
  max-width: 720px;
  margin: 0 auto;
}

/* ============= Landing：噪点 / 跑马灯 / Features / Demo / CTA / Footer ============= */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-noise);
  opacity: 0.035;
  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)'/%3E%3C/svg%3E");
}

.marquee-section {
  position: relative;
  z-index: 1;
  padding: 60px 0;
  overflow: hidden !important;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

/* 跑马灯：位于 Hero（标题+智能看板）下方 */
.marquee-section.marquee-under-hero {
  padding: 15px 0;
  border-top: 1px solid var(--border);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 18%, #000 82%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 18%, #000 82%, transparent 100%);
}

.marquee-spotlight {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 55% 120% at 50% 50%, rgba(255, 255, 255, 0.07) 0%, transparent 70%);
  z-index: 0;
}

.marquee-under-hero .marquee-track {
  position: relative;
  z-index: 1;
}

/* 两段连续文案横滑；不用多 div 词条，避免内嵌预览掉成左侧竖排 */
.marquee-track {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: center !important;
  width: max-content !important;
  max-width: none !important;
  white-space: nowrap !important;
  animation: marquee-scroll 32s linear infinite;
  will-change: transform;
}

.marquee-seq {
  display: inline-block !important;
  flex: 0 0 auto !important;
  white-space: nowrap !important;
  font-size: 13px !important;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  line-height: 1.4;
}

@keyframes marquee-scroll {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-50%, 0, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none !important; transform: none !important; }
}

.landing-features {
  padding: 100px 40px 120px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 100px;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--text-primary);
}

.section-title span { color: var(--text-muted); }

.landing-features .features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.landing-features .feature-card {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 36px;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.landing-features .feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.landing-features .feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-glass-hover);
  transform: translateY(-6px);
}

.landing-features .feature-card:hover::before { opacity: 1; }

.landing-features .feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 28px;
  color: var(--text-primary);
}

.landing-features .feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.landing-features .feature-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.landing-features .feature-card.feature-wide {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.feature-visual {
  height: 200px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.feature-visual::before {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
  animation: visualPulse 4s ease-in-out infinite;
}

@keyframes visualPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.3); opacity: 1; }
}

.demo {
  padding: 0 40px 160px;
  max-width: 1000px;
  margin: 0 auto;
}

.demo-container {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.demo-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.demo-dots { display: flex; gap: 8px; }

.demo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.demo-dot:nth-child(1) { background: rgba(255, 255, 255, 0.3); }
.demo-dot:nth-child(2) { background: rgba(255, 255, 255, 0.15); }
.demo-dot:nth-child(3) { background: rgba(255, 255, 255, 0.08); }

.demo-title {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-left: 8px;
}

.demo-body { padding: 40px; }

.email-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  margin-bottom: 12px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.email-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-hover);
}

.email-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.03) 100%);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.email-content { flex: 1; min-width: 0; }

.email-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.email-sender {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.email-time {
  font-size: 12px;
  color: var(--text-muted);
}

.email-subject {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.email-ai-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

.email-ai-tag svg { width: 12px; height: 12px; }

.cta-landing {
  padding: 160px 40px;
  text-align: center;
  position: relative;
}

.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 60%);
  pointer-events: none;
}

.cta-landing h2 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.cta-landing p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 40px;
  background: var(--text-primary);
  color: var(--bg);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-decoration: none;
  border-radius: 12px;
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255, 255, 255, 0.12);
  color: var(--bg);
}

.landing-footer {
  padding: 60px 40px 40px;
  border-top: 1px solid var(--border);
}

.landing-footer .footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 40px;
}

.landing-footer .footer-brand {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 3px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.landing-footer .footer-brand-desc {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 260px;
  line-height: 1.6;
  margin: 0;
}

.landing-footer .footer-links {
  display: flex;
  gap: 60px;
}

.landing-footer .footer-col h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.landing-footer .footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

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

.landing-footer .footer-bottom {
  max-width: 1200px;
  margin: 50px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.landing-footer .footer-bottom p {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.9s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============= 响应式：导航 ============= */
@media (max-width: 960px) {
  .glass-nav,
  .nav { padding: 16px 24px; }

  .nav-toggle { display: inline-flex; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(0, 0, 0, 0.92);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0 var(--space-3);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
  }

  .nav-links.open {
    max-height: 480px;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .nav-links a { display: block; padding: 12px 16px; }

  .nav-actions { display: none; }

  .hero { padding: 120px 24px 60px; }
  .hero.hero-dense {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 28px 20px 32px;
    gap: 28px;
  }
  .hero-dense .hero-copy,
  .hero-dense .hero-desc,
  .hero-dense .hero-hint { text-align: center; }
  .hero-dense .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-dense .hero-form { margin-left: auto; margin-right: auto; }
  .marquee-section.marquee-under-hero { padding: 12px 0; }
  .site-nav { gap: 28px; margin-bottom: 36px; }
  .hero-form { flex-direction: column; }
  .landing-features { padding: 100px 24px; }
  .landing-features .features-grid { grid-template-columns: 1fr; }
  .landing-features .feature-card.feature-wide {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }
  .demo { padding: 0 24px 100px; }
  .demo-body { padding: 24px; }
  .cta-landing { padding: 100px 24px; }
  .landing-footer { padding: 40px 24px 30px; }
  .landing-footer .footer-inner { flex-direction: column; }
  .landing-footer .footer-links { flex-wrap: wrap; gap: 40px; }
}

@media (max-width: 1024px) {
  .admin-sidebar,
  .ops-sidebar,
  .sidebar { display: none; }
}

/* ============= AI Inbox Console (Webmail V0.6) ============= */
.console-body {
  background: var(--bg);
  min-height: 100vh;
  overflow: hidden;
}

.ai-inbox {
  display: grid;
  grid-template-columns: 220px minmax(280px, 1fr) minmax(320px, 1.1fr);
  gap: 12px;
  height: calc(100vh - var(--nav-height));
  margin-top: var(--nav-height);
  padding: 12px;
  box-sizing: border-box;
}

.ai-inbox-sidebar {
  padding: 16px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  overflow: auto;
}

.ai-folder-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 16px;
}

.ai-folder {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.ai-folder:hover,
.ai-folder.active {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.ai-folder .count {
  font-size: 11px;
  color: var(--text-muted);
}

.ai-folder-label {
  margin: 16px 12px 6px;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.ai-inbox-list,
.ai-inbox-reader {
  margin: 0;
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.ai-list-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
}

.ai-list-toolbar input {
  flex: 1;
  max-width: 220px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  font-size: 12px;
  outline: none;
}

.ai-mail-list {
  overflow: auto;
  flex: 1;
}

.ai-mail-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
}

.ai-mail-item:hover,
.ai-mail-item.active {
  background: rgba(255, 255, 255, 0.04);
}

.ai-mail-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.ai-mail-subject {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.ai-mail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}

.ai-tag {
  font-size: 10px;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.ai-tag.risk.is-mid { color: #e8d5a3; border-color: rgba(232, 213, 163, 0.35); }
.ai-tag.risk.is-high,
.ai-risk-badge.is-high { color: #f0f0f0; border-color: rgba(255, 255, 255, 0.35); background: rgba(255, 255, 255, 0.08); }

.ai-mail-preview {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.ai-reader-empty,
.ai-empty-list {
  padding: 40px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

.ai-reader-body {
  overflow: auto;
  padding: 20px;
  flex: 1;
}

.ai-reader-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.ai-reader-header h1 {
  font-size: 18px;
  line-height: 1.35;
  margin-bottom: 6px;
}

.ai-reader-header p {
  font-size: 12px;
  color: var(--text-muted);
}

.ai-project-pill {
  align-self: flex-start;
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
}

.ai-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.ai-card-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.ai-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ai-risk-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.ai-risk-badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.ai-risk-badge.is-mid { color: #e8d5a3; border-color: rgba(232, 213, 163, 0.35); }

.ai-actions {
  margin: 0 0 12px;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.7;
}

.ai-mail-body {
  white-space: pre-wrap;
  font-family: inherit;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.webmail-nav { padding: 0; height: var(--nav-height); }

@media (max-width: 1100px) {
  .ai-inbox {
    grid-template-columns: 200px 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .ai-inbox-reader { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .ai-inbox {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
  }
  .console-body { overflow: auto; }
}

/* Compose modal */
.compose-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.compose-modal[hidden] { display: none !important; }
.compose-dialog {
  width: min(560px, 100%);
  padding: 28px;
  max-height: 90vh;
  overflow: auto;
}