/* ==========================================================================
   nice加速 (nicejiasu.mom)
   Exclusive Design System: Swiss Kinetic Typography & Bauhaus Exposed-Grid
   Palette:
   - Architectural Warm Paper: #F4F3EE
   - Carbon Black:             #121212
   - Electric Lime:            #D9F36A
   - Bauhaus Vermilion:        #FF5B35
   - Cobalt Violet:            #6B5CE7
   - Exposed Hairline Grid:    1px solid #121212 / 2px solid #121212
   ========================================================================== */

:root {
  --color-bg-primary: #F4F3EE;
  --color-bg-surface: #FFFFFF;
  --color-bg-subtle: #E8E6DF;
  --color-bg-dark: #121212;
  --color-text-primary: #121212;
  --color-text-secondary: #2B2B2B;
  --color-text-muted: #5A5A55;
  --color-secondary: #6B5CE7;
  --color-accent: #FF5B35;
  --color-highlight: #D9F36A;
  --color-border: #121212;
  --color-border-hairline: rgba(18, 18, 18, 0.22);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --container-max: 1360px;
  --header-height: 70px;
}

/* Darkroom Theme Mode (夜间暗房) */
[data-theme="dark"] {
  --color-bg-primary: #0E0E11;
  --color-bg-surface: #17171C;
  --color-bg-subtle: #202027;
  --color-bg-dark: #070709;
  --color-text-primary: #F4F3EE;
  --color-text-secondary: #D2D0C8;
  --color-text-muted: #8E8C84;
  --color-border: #3A3A44;
  --color-border-hairline: rgba(244, 243, 238, 0.16);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.62;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  background-image: radial-gradient(var(--color-border-hairline) 1px, transparent 1px);
  background-size: 24px 24px;
  transition: background-color 0.22s ease, color 0.22s ease;
}

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

a {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 4px;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}

a:hover {
  color: #121212;
  background-color: var(--color-highlight);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.layout-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  top: -120px;
  left: 1rem;
  background: #121212;
  color: var(--color-highlight);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  text-decoration: none;
  font-weight: 900;
  border: 2px solid var(--color-highlight);
}

.skip-link:focus {
  top: 0.75rem;
}

/* ==========================================================================
   1. Exposed 4-Cell Swiss Architectural Grid Bar (.swiss-nav-bar)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 300;
  background-color: var(--color-bg-primary);
  border-bottom: 2px solid var(--color-border);
}

.swiss-nav-grid {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto auto;
  border-left: 2px solid var(--color-border);
  border-right: 2px solid var(--color-border);
}

@media (min-width: 980px) {
  .swiss-nav-grid {
    grid-template-columns: 1.15fr 1.85fr 0.85fr 0.75fr;
  }
}

.swiss-nav-cell {
  display: flex;
  align-items: center;
  padding: 0 1.15rem;
  border-right: 1px solid var(--color-border);
  min-height: var(--header-height);
}

.swiss-nav-cell:last-child {
  border-right: none;
}

/* Cell [01] Brand & Coordinates */
.swiss-nav-cell--brand {
  justify-content: space-between;
  gap: 0.75rem;
}

.swiss-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text-primary);
}

.swiss-brand-link:hover {
  background-color: transparent;
  color: var(--color-accent);
}

.swiss-brand-mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border: 1.5px solid var(--color-border);
}

.swiss-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.swiss-brand-name {
  font-size: 1.22rem;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.swiss-brand-coord {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-top: 0.18rem;
}

/* Cell [02] Index Navigation */
.swiss-nav-cell--links {
  display: none;
  padding: 0;
}

@media (min-width: 980px) {
  .swiss-nav-cell--links {
    display: flex;
  }
}

.swiss-nav-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: 100%;
  height: 100%;
}

.swiss-nav-list li {
  height: 100%;
  border-right: 1px solid var(--color-border-hairline);
}

.swiss-nav-list li:last-child {
  border-right: none;
}

.swiss-nav-link {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 0.9rem;
  height: 100%;
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: 800;
  font-size: 0.9rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.swiss-nav-link__idx {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.2rem;
}

.swiss-nav-link:hover,
.swiss-nav-link.is-active {
  background-color: var(--color-highlight);
  color: #121212;
}

.swiss-nav-link:hover .swiss-nav-link__idx,
.swiss-nav-link.is-active .swiss-nav-link__idx {
  color: #121212;
}

/* Cell [03] Live Theme Mode Toggle */
.swiss-nav-cell--theme {
  justify-content: center;
  padding: 0 0.75rem;
}

.theme-toggle-btn {
  width: 100%;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0 0.75rem;
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--color-highlight);
  color: #121212;
}

.theme-toggle-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 1.5px solid #121212;
  flex-shrink: 0;
}

[data-theme="dark"] .theme-toggle-dot {
  background-color: var(--color-highlight);
}

/* Cell [04] Full-Height Vermilion/Lime Block CTA */
.swiss-nav-cell--cta {
  padding: 0;
}

.swiss-nav-cta {
  width: 100%;
  height: 100%;
  min-height: var(--header-height);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0 1.25rem;
  background-color: var(--color-accent);
  color: #121212;
  font-weight: 900;
  font-size: 0.96rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background-color 0.16s ease, color 0.16s ease;
}

.swiss-nav-cta:hover {
  background-color: var(--color-highlight);
  color: #121212;
}

.swiss-mobile-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border);
  cursor: pointer;
}

@media (min-width: 980px) {
  .swiss-mobile-trigger {
    display: none;
  }
}

.site-header__mobile-drawer {
  display: none;
  background-color: var(--color-bg-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 1rem 1.25rem 1.35rem;
}

.site-header__mobile-drawer.is-open {
  display: block;
}

.site-header__mobile-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.site-header__mobile-link {
  display: flex;
  align-items: center;
  padding: 0.65rem 0.75rem;
  border: 1.5px solid var(--color-border);
  text-decoration: none;
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--color-text-primary);
}

/* Legacy header fallback support */
.site-header__inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ==========================================================================
   Buttons & Swiss Controls
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 50px;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 900;
  line-height: 1.15;
  text-decoration: none;
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease, background-color 0.14s ease, color 0.14s ease;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #121212;
  box-shadow: 4px 4px 0 var(--color-border);
}

.btn--primary:hover {
  background-color: var(--color-highlight);
  color: #121212;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-border);
}

.btn--lime {
  background-color: var(--color-highlight);
  color: #121212;
  box-shadow: 4px 4px 0 var(--color-border);
}

.btn--lime:hover {
  background-color: var(--color-accent);
  color: #121212;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-border);
}

.btn--secondary {
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  box-shadow: 4px 4px 0 var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-secondary);
  color: #FFFFFF;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-border);
}

.btn--full {
  width: 100%;
}

/* ==========================================================================
   2. Hero Layout: 12-Column Exposed Swiss Poster Grid + Interactive Client Widget
   ========================================================================== */
.swiss-hero {
  border-bottom: 2px solid var(--color-border);
}

.swiss-hero__frame {
  max-width: var(--container-max);
  margin: 0 auto;
  border-left: 2px solid var(--color-border);
  border-right: 2px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .swiss-hero__frame {
    grid-template-columns: repeat(12, 1fr);
  }
}

/* Left 7 Columns */
.swiss-hero__left {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg-primary);
}

@media (min-width: 1024px) {
  .swiss-hero__left {
    grid-column: span 7;
    border-bottom: none;
    border-right: 2px solid var(--color-border);
  }
}

.swiss-hero__meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
}

.swiss-hero__live-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.6rem;
  background-color: var(--color-highlight);
  color: #121212;
  border: 1.5px solid #121212;
}

.swiss-hero__poster-body {
  padding: 2.25rem 1.5rem;
}

@media (min-width: 768px) {
  .swiss-hero__poster-body {
    padding: 2.75rem 2.25rem;
  }
}

/* Exposed Kinetic Index Triggers (01—GLOBAL, 02—ZERO-LAG, 03—MULTI-OS) */
.swiss-kinetic-triggers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  margin-bottom: 1.65rem;
}

@media (min-width: 640px) {
  .swiss-kinetic-triggers {
    grid-template-columns: repeat(3, 1fr);
  }
}

.kinetic-idx-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0.65rem 0.85rem;
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border);
  cursor: pointer;
  text-align: left;
  transition: background-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.kinetic-idx-btn__code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

.kinetic-idx-btn__desc {
  font-size: 0.78rem;
  font-weight: 800;
  margin-top: 0.2rem;
}

.kinetic-idx-btn:hover,
.kinetic-idx-btn.is-active {
  background-color: #121212;
  color: var(--color-highlight);
  transform: translateY(-2px);
}

.kinetic-idx-btn:hover .kinetic-idx-btn__code,
.kinetic-idx-btn.is-active .kinetic-idx-btn__code {
  color: var(--color-highlight);
}

.swiss-hero__h1 {
  font-size: clamp(2rem, 4.1vw, 3.35rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin-bottom: 1.25rem;
  color: var(--color-text-primary);
}

.swiss-hero__h1-mark {
  display: inline;
  background-color: var(--color-highlight);
  color: #121212;
  padding: 0 0.25rem;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.swiss-hero__lead {
  font-size: 1.04rem;
  color: var(--color-text-secondary);
  max-width: 42rem;
  margin-bottom: 1.5rem;
}

.swiss-hero__dynamic-callout {
  padding: 0.75rem 1rem;
  background-color: var(--color-bg-surface);
  border-left: 5px solid var(--color-accent);
  border-top: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 800;
  margin-bottom: 1.75rem;
}

.swiss-hero__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.swiss-hero__bottom-cells {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
}

.swiss-hero__mini-cell {
  padding: 0.95rem 1.1rem;
  border-right: 1px solid var(--color-border);
}

.swiss-hero__mini-cell:last-child {
  border-right: none;
}

.swiss-hero__mini-val {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-accent);
}

.swiss-hero__mini-lbl {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}

/* Right 5 Columns: Interactive Simulated Client App Widget (niceClient v4.2) */
.swiss-hero__right {
  background-color: #121212;
  color: #F4F3EE;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

@media (min-width: 1024px) {
  .swiss-hero__right {
    grid-column: span 5;
  }
}

.nice-client-widget {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.nice-client__titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background-color: #1C1C22;
  border-bottom: 1px solid #34343E;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
}

.nice-client__win-dots {
  display: inline-flex;
  gap: 6px;
}

.nice-client__win-dots span {
  width: 10px;
  height: 10px;
  display: inline-block;
  border: 1px solid #121212;
}

.nice-client__body {
  padding: 1.5rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex-grow: 1;
}

.nice-client__status-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.9rem;
  background-color: #1A1A20;
  border: 1.5px solid #383844;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.nice-client-widget.is-connected .nice-client__status-banner {
  background-color: rgba(217, 243, 106, 0.12);
  border-color: var(--color-highlight);
  color: var(--color-highlight);
}

/* Power Switch Core */
.nice-client__power-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.35rem 0;
}

.nice-client__sonar {
  position: absolute;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  border: 2px solid var(--color-highlight);
  opacity: 0;
  pointer-events: none;
}

.nice-client-widget.is-connected .nice-client__sonar--1 {
  animation: bauhausSonar 2.2s infinite ease-out;
}

.nice-client-widget.is-connected .nice-client__sonar--2 {
  animation: bauhausSonar 2.2s infinite 0.9s ease-out;
}

@keyframes bauhausSonar {
  0% {
    transform: scale(0.88);
    opacity: 0.75;
  }
  100% {
    transform: scale(1.55);
    opacity: 0;
  }
}

.nice-client__power-btn {
  position: relative;
  z-index: 2;
  width: 136px;
  height: 136px;
  border-radius: 50%;
  background-color: #23232B;
  color: #F4F3EE;
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 6px rgba(255, 91, 53, 0.18);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.nice-client__power-btn:hover {
  transform: scale(1.04);
}

.nice-client-widget.is-connected .nice-client__power-btn {
  background-color: var(--color-highlight);
  color: #121212;
  border-color: #121212;
  box-shadow: 0 0 0 8px rgba(217, 243, 106, 0.26);
}

.nice-client__power-label {
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

/* Telemetry Speed Counters */
.nice-client__telemetry {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1.5px solid #383844;
  background-color: #18181E;
}

.nice-client__telemetry-cell {
  padding: 0.65rem 0.85rem;
  border-right: 1px solid #383844;
  font-family: var(--font-mono);
}

.nice-client__telemetry-cell:last-child {
  border-right: none;
}

.nice-client__telemetry-lbl {
  font-size: 0.68rem;
  color: #9A9890;
  display: block;
}

.nice-client__telemetry-val {
  font-size: 1.02rem;
  font-weight: 900;
  color: var(--color-highlight);
}

/* Clickable Node Pills */
.nice-client__nodes-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  color: #A6A49C;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}

.nice-client__node-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.client-node-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.7rem;
  background-color: #1C1C24;
  color: #F4F3EE;
  border: 1.5px solid #383844;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.client-node-pill__ping {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 900;
  color: var(--color-highlight);
}

.client-node-pill:hover,
.client-node-pill.is-selected {
  background-color: var(--color-secondary);
  border-color: var(--color-highlight);
  color: #FFFFFF;
}

.nice-client__footer-bar {
  padding: 0.85rem 1.35rem;
  border-top: 1px solid #383844;
  background-color: #18181E;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.nice-client__sub-link {
  color: var(--color-highlight);
  font-weight: 900;
  text-decoration: none;
}

/* ==========================================================================
   Shared Swiss Architectural Section Headers
   ========================================================================== */
.swiss-section {
  border-bottom: 2px solid var(--color-border);
}

.swiss-section__frame {
  max-width: var(--container-max);
  margin: 0 auto;
  border-left: 2px solid var(--color-border);
  border-right: 2px solid var(--color-border);
  background-color: var(--color-bg-primary);
}

.swiss-section__head {
  display: grid;
  grid-template-columns: 1fr;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg-surface);
}

@media (min-width: 860px) {
  .swiss-section__head {
    grid-template-columns: 260px 1fr;
  }
}

.swiss-section__index-box {
  padding: 1.5rem 1.5rem;
  background-color: #121212;
  color: var(--color-highlight);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-family: var(--font-mono);
}

@media (min-width: 860px) {
  .swiss-section__index-box {
    border-bottom: none;
    border-right: 2px solid var(--color-border);
  }
}

.swiss-section__idx-num {
  font-size: 2.1rem;
  font-weight: 900;
  line-height: 1;
}

.swiss-section__idx-tag {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #F4F3EE;
  margin-top: 0.5rem;
}

.swiss-section__title-box {
  padding: 1.65rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.swiss-section__title {
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 0.45rem;
}

.swiss-section__subtitle {
  font-size: 0.98rem;
  color: var(--color-text-secondary);
  max-width: 50rem;
}

/* ==========================================================================
   3. Section 1: Horizontal Expanding Accordion Slices (#scenarios)
   ========================================================================== */
.scenario-accordion {
  display: flex;
  flex-direction: column;
  width: 100%;
  background-color: var(--color-bg-surface);
}

@media (min-width: 960px) {
  .scenario-accordion {
    flex-direction: row;
    min-height: 450px;
  }
}

.scenario-slice {
  flex: 1;
  border-bottom: 1.5px solid var(--color-border);
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  padding: 1.5rem 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  overflow: hidden;
  transition: flex 0.42s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.22s ease, color 0.22s ease;
}

@media (min-width: 960px) {
  .scenario-slice {
    border-bottom: none;
    border-right: 1.5px solid var(--color-border);
  }
  .scenario-slice:last-child {
    border-right: none;
  }
  .scenario-slice.is-active {
    flex: 3.15;
  }
}

.scenario-slice.is-active {
  background-color: var(--color-bg-primary);
}

.scenario-slice__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 1rem;
  border-bottom: 1.5px solid var(--color-border);
}

.scenario-slice__num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 900;
  padding: 0.2rem 0.55rem;
  background-color: #121212;
  color: var(--color-highlight);
}

.scenario-slice.is-active .scenario-slice__num {
  background-color: var(--color-accent);
  color: #121212;
}

.scenario-slice__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
}

.scenario-slice__title {
  font-size: 1.35rem;
  font-weight: 900;
  margin: 1.15rem 0 0.65rem;
  line-height: 1.25;
}

.scenario-slice__detail {
  display: none;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.scenario-slice.is-active .scenario-slice__detail {
  display: flex;
}

.scenario-slice__collapsed-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--color-accent);
}

.scenario-slice.is-active .scenario-slice__collapsed-hint {
  display: none;
}

.scenario-slice__specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
}

.scenario-slice__specs li {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  padding: 0.25rem 0.6rem;
  background-color: var(--color-highlight);
  color: #121212;
  border: 1px solid #121212;
}

.scenario-slice__diagram {
  padding: 0.85rem;
  background-color: #121212;
  border: 1.5px solid var(--color-border);
}

/* ==========================================================================
   4. Section 2: Exposed 12-Column Swiss Bento Stat & Feature Matrix (#features)
   ========================================================================== */
.bento-matrix {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 960px) {
  .bento-matrix {
    grid-template-columns: repeat(12, 1fr);
  }
}

.bento-cell {
  padding: 2rem 1.65rem;
  border-bottom: 1.5px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.15rem;
}

@media (min-width: 960px) {
  .bento-cell {
    border-right: 1.5px solid var(--color-border);
  }
  .bento-cell--span-5 {
    grid-column: span 5;
  }
  .bento-cell--span-4 {
    grid-column: span 4;
  }
  .bento-cell--span-3 {
    grid-column: span 3;
    border-right: none;
  }
  .bento-cell--span-8 {
    grid-column: span 8;
    border-right: none;
  }
}

.bento-cell--paper {
  background-color: var(--color-bg-surface);
}

.bento-cell--lime {
  background-color: var(--color-highlight);
  color: #121212;
}

.bento-cell--dark {
  background-color: #121212;
  color: #F4F3EE;
}

.bento-cell--violet {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

.bento-cell__index {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bento-cell__giant-num {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 4.6vw, 4.1rem);
  font-weight: 900;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.bento-cell__title {
  font-size: 1.26rem;
  font-weight: 900;
  line-height: 1.25;
}

.bento-cell__desc {
  font-size: 0.94rem;
  line-height: 1.58;
  opacity: 0.92;
}

/* ==========================================================================
   5. Section 3: Interactive Traffic Calculator + Color-Block Bauhaus Pricing (#pricing)
   ========================================================================== */
.swiss-calc {
  display: grid;
  grid-template-columns: 1fr;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg-surface);
}

@media (min-width: 960px) {
  .swiss-calc {
    grid-template-columns: 7fr 5fr;
  }
}

.swiss-calc__controls {
  padding: 1.85rem 1.65rem;
  border-bottom: 1.5px solid var(--color-border);
}

@media (min-width: 960px) {
  .swiss-calc__controls {
    border-bottom: none;
    border-right: 2px solid var(--color-border);
  }
}

.swiss-calc__heading {
  font-size: 1.15rem;
  font-weight: 900;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.habit-check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

@media (min-width: 640px) {
  .habit-check-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.habit-check-card {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.85rem 0.95rem;
  background-color: var(--color-bg-primary);
  border: 1.5px solid var(--color-border);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.habit-check-card:hover {
  transform: translateY(-1px);
}

.habit-check-card.is-checked {
  background-color: var(--color-highlight);
  color: #121212;
  border-color: #121212;
}

.habit-check-card input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 0.18rem;
  accent-color: #121212;
  flex-shrink: 0;
}

.habit-check-card__title {
  font-size: 0.88rem;
  font-weight: 900;
  display: block;
}

.habit-check-card__gb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-accent);
}

.habit-check-card.is-checked .habit-check-card__gb {
  color: #121212;
}

.swiss-calc__result {
  padding: 1.85rem 1.65rem;
  background-color: #121212;
  color: #F4F3EE;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
}

.swiss-calc__readout {
  font-family: var(--font-mono);
  font-size: 1.12rem;
  font-weight: 900;
  color: var(--color-highlight);
  line-height: 1.4;
}

.swiss-calc__meter {
  width: 100%;
  height: 14px;
  background-color: #2A2A34;
  border: 1.5px solid #F4F3EE;
  overflow: hidden;
}

.swiss-calc__meter-fill {
  height: 100%;
  width: 42%;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

/* Bauhaus Color-Block Pricing Grid */
.bauhaus-pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 960px) {
  .bauhaus-pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.bauhaus-plan {
  padding: 2.15rem 1.75rem;
  border-bottom: 1.5px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

@media (min-width: 960px) {
  .bauhaus-plan {
    border-bottom: none;
    border-right: 2px solid var(--color-border);
  }
  .bauhaus-plan:last-child {
    border-right: none;
  }
}

/* Plan 1: Pure White Block */
.bauhaus-plan--white {
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
}

/* Plan 2: Carbon Black + Electric Lime Block */
.bauhaus-plan--black {
  background-color: #121212;
  color: #F4F3EE;
}

/* Plan 3: Cobalt Violet Block */
.bauhaus-plan--cobalt {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

.bauhaus-plan.is-calc-matched {
  outline: 4px solid var(--color-accent);
  outline-offset: -4px;
}

.bauhaus-plan__match-pill {
  display: none;
  align-self: flex-start;
  padding: 0.25rem 0.65rem;
  background-color: var(--color-highlight);
  color: #121212;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 900;
  border: 1.5px solid #121212;
}

.bauhaus-plan.is-calc-matched .bauhaus-plan__match-pill {
  display: inline-flex;
}

.bauhaus-plan__code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 900;
  opacity: 0.85;
}

.bauhaus-plan__name {
  font-size: 1.45rem;
  font-weight: 900;
  margin: 0.3rem 0 0.65rem;
}

.bauhaus-plan__price-box {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.85rem 0;
  border-top: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  margin-bottom: 1rem;
}

.bauhaus-plan__price {
  font-family: var(--font-mono);
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1;
}

.bauhaus-plan--black .bauhaus-plan__price {
  color: var(--color-highlight);
}

.bauhaus-plan__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.92rem;
  font-weight: 700;
}

/* ==========================================================================
   6. Section 4: Unified Ecosystem Checkerboard & Two-Column Numbered Index FAQ
   ========================================================================== */
.swiss-checkerboard {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  border-bottom: 2px solid var(--color-border);
}

@media (min-width: 640px) {
  .swiss-checkerboard {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .swiss-checkerboard {
    grid-template-columns: repeat(4, 1fr);
  }
}

.checker-cell {
  padding: 1.5rem 1.35rem;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
  transition: background-color 0.16s ease, color 0.16s ease;
}

.checker-cell:nth-child(even) {
  background-color: var(--color-bg-primary);
}

.checker-cell:hover {
  background-color: var(--color-highlight);
  color: #121212;
}

.checker-cell__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 900;
}

.checker-cell__badge {
  padding: 0.15rem 0.45rem;
  background-color: #121212;
  color: var(--color-highlight);
}

.checker-cell__title {
  font-size: 1.15rem;
  font-weight: 900;
}

.checker-cell__desc {
  font-size: 0.86rem;
  color: var(--color-text-secondary);
}

.checker-cell:hover .checker-cell__desc {
  color: #121212;
}

/* 2-Column Swiss Numbered Index FAQ */
.swiss-faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  background-color: var(--color-bg-surface);
}

@media (min-width: 860px) {
  .swiss-faq-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.swiss-faq-item {
  border-bottom: 1.5px solid var(--color-border);
  border-right: 1.5px solid var(--color-border);
  padding: 1.35rem 1.5rem;
}

.swiss-faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-weight: 900;
  font-size: 1.04rem;
}

.swiss-faq-item summary::-webkit-details-marker {
  display: none;
}

.swiss-faq-item__qnum {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 900;
  padding: 0.2rem 0.5rem;
  background-color: var(--color-highlight);
  color: #121212;
  border: 1.5px solid #121212;
  flex-shrink: 0;
}

.swiss-faq-item[open] .swiss-faq-item__qnum {
  background-color: var(--color-accent);
}

.swiss-faq-item__ans {
  margin-top: 0.9rem;
  padding-left: 3.1rem;
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   7. zhinan.html — Swiss Bauhaus Technical Index Table (.swiss-index-table)
   ========================================================================== */
.swiss-index-table {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-surface);
}

.swiss-index-row {
  display: grid;
  grid-template-columns: 1fr;
  border-bottom: 2px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text-primary);
  transition: background-color 0.16s ease, color 0.16s ease;
}

@media (min-width: 860px) {
  .swiss-index-row {
    grid-template-columns: 110px 180px 1fr 170px;
    align-items: stretch;
  }
}

.swiss-index-row:hover {
  background-color: var(--color-highlight);
  color: #121212;
}

.swiss-index-row__num {
  padding: 1.35rem;
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #121212;
  color: var(--color-highlight);
  border-right: 1.5px solid var(--color-border);
}

.swiss-index-row:hover .swiss-index-row__num {
  background-color: var(--color-accent);
  color: #121212;
}

.swiss-index-row__cat {
  padding: 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 900;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1.5px solid var(--color-border);
}

.swiss-index-row__body {
  padding: 1.5rem 1.65rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.45rem;
  border-right: 1.5px solid var(--color-border);
}

.swiss-index-row__title {
  font-size: 1.28rem;
  font-weight: 900;
  line-height: 1.28;
}

.swiss-index-row__excerpt {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
}

.swiss-index-row:hover .swiss-index-row__excerpt {
  color: #121212;
}

.swiss-index-row__action {
  padding: 1.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 900;
}

/* ==========================================================================
   8. Subpage Support (.breadcrumb-bar, .article-layout, .article-content, .site-footer)
   ========================================================================== */
.breadcrumb-bar {
  padding: 0.85rem 0;
  background-color: var(--color-highlight);
  color: #121212;
  border-bottom: 2px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 800;
}

.breadcrumb-bar a {
  color: #121212;
}

.breadcrumb-bar__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-bar__item + .breadcrumb-bar__item::before {
  content: "//";
  margin-right: 0.5rem;
  color: #121212;
}

.article-layout {
  padding: 3rem 0 4.5rem;
}

.article-content {
  max-width: 54rem;
  margin: 0 auto;
  background-color: var(--color-bg-surface);
  border: 2px solid var(--color-border);
  box-shadow: 8px 8px 0 var(--color-border);
  padding: 2.25rem 1.5rem;
}

@media (min-width: 768px) {
  .article-content {
    padding: 3rem 3.25rem;
  }
}

.article-content__header {
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 3px solid var(--color-border);
}

.article-content__title {
  font-size: clamp(1.75rem, 3.5vw, 2.45rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 0.85rem;
}

.article-content__meta {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 800;
  color: var(--color-accent);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.article-content h2 {
  font-size: 1.38rem;
  font-weight: 900;
  margin: 2.25rem 0 0.9rem;
  padding: 0.4rem 0.8rem;
  background-color: var(--color-highlight);
  border: 2px solid #121212;
  color: #121212;
}

.article-content h3 {
  font-size: 1.14rem;
  font-weight: 900;
  margin: 1.45rem 0 0.55rem;
  color: var(--color-text-primary);
}

.article-content p {
  margin-bottom: 1.15rem;
  color: var(--color-text-secondary);
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.35rem 1.4rem;
  color: var(--color-text-secondary);
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content__cta-box {
  margin-top: 2.5rem;
  padding: 1.65rem;
  background-color: var(--color-highlight);
  color: #121212;
  border: 2px solid #121212;
  box-shadow: 6px 6px 0 var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

.article-content__cta-box p {
  color: #121212;
}

.article-content__related {
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--color-border);
}

.site-footer {
  margin-top: auto;
  background-color: #121212;
  color: #F4F3EE;
  border-top: 2px solid var(--color-border);
  padding: 3rem 0 4rem;
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.site-footer__links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.35rem;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--color-highlight);
  font-weight: 800;
  text-decoration: none;
  padding: 0 0.4rem;
}

.site-footer__link:hover {
  background-color: var(--color-highlight);
  color: #121212;
}

.site-footer__disclosure {
  padding-top: 1rem;
  border-top: 1px solid #34343E;
  color: #A09E96;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}