/* ==========================================================================
   浙江坤芯智算科技有限公司 (KUNXIN INTELLIGENT COMPUTING · KUNXIN AI) 官方网站样式表 v7.6
   Design Benchmarks: Linear · Vercel · Stripe · Apple · Figma
   Brand Identity: 坤芯铂金灰 (Kunxin Platinum) × 智算电光蓝 (Compute Electric Blue)
   Core Principles:
   1. Unified 2-Font & 8-Step Modular Type System (Zero Ad-Hoc Font Sizes)
   2. Authentic Industrial Tech Precision (Blueprint Hairlines, Corner Ticks, Tabular Telemetry)
   3. 5-Stage Circular Closed-Loop Diagram (环形循环图) in Ecosystem Synergy Hub
   4. Dual-Theme Adaptive Architecture & Full Mobile Ergonomics
   ========================================================================== */

:root {
  /* ------------------------------------------------------------------------
   * 1. Unified Font Stack (2 Cohesive Families: Architectural Sans + Tech Mono)
   * ------------------------------------------------------------------------ */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Menlo", "Consolas", ui-monospace, monospace;

  /* ------------------------------------------------------------------------
   * 2. Strict 8-Step Modular Type Scale & Line-Height System
   * ------------------------------------------------------------------------ */
  --text-2xs: 0.75rem;      /* 12px: Monospace badges, eyebrows, telemetry tags */
  --text-xs: 0.8125rem;     /* 13px: Secondary captions, KPI labels, footnotes */
  --text-sm: 0.875rem;      /* 14px: Card descriptions, nav items, buttons, specs */
  --text-base: 0.9375rem;   /* 15px: Standard body copy, form controls, profile values */
  --text-md: 1.0625rem;     /* 17px: Section lead copy, card titles (h4/h5) */
  --text-lg: 1.25rem;       /* 20px: Major card titles, subsection headings */
  --text-xl: clamp(1.375rem, 2.1vw, 1.75rem);     /* 22-28px: Panel headings, metric values */
  --text-2xl: clamp(1.875rem, 3.0vw, 2.625rem);   /* 30-42px: Section main titles (h2) */
  --text-display: clamp(2.375rem, 4.2vw, 3.75rem);/* 38-60px: Hero display title (h1) */

  --leading-tight: 1.16;
  --leading-snug: 1.32;
  --leading-normal: 1.64;
  --leading-relaxed: 1.74;

  /* ------------------------------------------------------------------------
   * 3. Silvpen Brand Identity Palette - Dark Mode (Default Obsidian Precision)
   * ------------------------------------------------------------------------ */
  --bg-primary: #030711;
  --bg-secondary: #060d1d;
  --bg-tertiary: #0a152c;
  --bg-elevated: rgba(11, 22, 46, 0.84);
  --bg-card: rgba(8, 17, 36, 0.72);
  --bg-card-hover: rgba(13, 27, 56, 0.88);
  --bg-glass: rgba(4, 10, 22, 0.80);
  --bg-nav-pill: rgba(10, 21, 44, 0.68);

  /* Text Hierarchy (Platinum White -> Silver Slate -> Muted Steel) */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #7c90b0;
  --text-accent: #38bdf8;

  /* Brand Signature Accents (Silvpen Platinum Silver + Electric Blue) */
  --brand-silver: #e2e8f0;
  --brand-blue: #0044cc;
  --brand-cyan: #0284c7;
  --brand-emerald: #10b981;
  --brand-gradient: linear-gradient(180deg, #1a5cff 0%, #0040bf 100%);
  --brand-metallic: linear-gradient(100deg, #ffffff 0%, #e2e8f0 48%, #93c5fd 100%);
  --brand-hero-highlight: linear-gradient(96deg, #ffffff 0%, #dbeafe 42%, #60a5fa 100%);

  /* Architectural Hairline Borders & Specular Top Edge */
  --border-subtle: rgba(148, 163, 184, 0.11);
  --border-accent: rgba(148, 163, 184, 0.20);
  --border-highlight: rgba(96, 165, 250, 0.42);
  --corner-tick-color: rgba(56, 189, 248, 0.55);
  --inset-specular: inset 0 1px 0 0 rgba(255, 255, 255, 0.10);
  --inset-specular-strong: inset 0 1px 0 0 rgba(255, 255, 255, 0.20), inset 0 0 18px rgba(0, 184, 255, 0.04);

  /* Hero Tokens - Dark Mode */
  --hero-bg-color: #02060f;
  --hero-overlay-bg:
    radial-gradient(ellipse 66% 64% at 24% 44%, rgba(3, 8, 20, 0.90) 0%, rgba(3, 8, 20, 0.38) 68%, transparent 100%),
    linear-gradient(90deg, rgba(2, 6, 15, 0.95) 0%, rgba(3, 10, 25, 0.85) 44%, rgba(3, 10, 25, 0.22) 78%, rgba(3, 10, 25, 0.48) 100%),
    linear-gradient(180deg, rgba(2, 6, 15, 0.68) 0%, transparent 24%, transparent 70%, var(--bg-primary) 100%);
  --hero-badge-bg: rgba(7, 18, 40, 0.76);
  --hero-badge-border: rgba(148, 163, 184, 0.24);
  --hero-badge-text: #e2e8f0;
  --hero-title-color: #ffffff;
  --hero-subtitle-color: #cbd5e1;
  --hero-quote-bg: rgba(7, 18, 40, 0.72);
  --hero-quote-text: #e2e8f0;
  --hero-metrics-bg: rgba(6, 14, 32, 0.82);
  --hero-metrics-border: rgba(148, 163, 184, 0.20);
  --hero-metric-divider: rgba(148, 163, 184, 0.13);

  /* Shadows, Elevation & Optical Blur */
  --shadow-sm: 0 4px 16px -2px rgba(0, 0, 0, 0.36), var(--inset-specular);
  --shadow-md: 0 16px 40px -6px rgba(1, 5, 16, 0.58), var(--inset-specular);
  --shadow-lg: 0 28px 68px -10px rgba(0, 5, 20, 0.76), var(--inset-specular);
  --shadow-glow: 0 16px 38px -8px rgba(0, 30, 80, 0.42), var(--inset-specular);
  --blur-glass: blur(20px) saturate(150%);

  /* Layout, Radii & Motion Easing */
  --container-max: 1320px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 0.22s var(--ease-out-expo);
  --transition-smooth: 0.45s var(--ease-out-expo);
}

/* ==========================================================================
   Light Theme Override (Architectural Daylight Mode)
   ========================================================================== */
[data-theme="light"] {
  --bg-primary: #f7f9fc;
  --bg-secondary: #f1f4f9;
  --bg-tertiary: #e6ebf2;
  --bg-elevated: rgba(255, 255, 255, 0.96);
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(248, 250, 254, 0.90);
  --bg-nav-pill: rgba(238, 243, 250, 0.90);

  --text-primary: #090d16;
  --text-secondary: #3e4c5e;
  --text-muted: #64748b;
  --text-accent: #003ecb;

  --brand-metallic: linear-gradient(100deg, #090d16 0%, #1e3a8a 55%, #003ecb 100%);
  --brand-hero-highlight: linear-gradient(96deg, #090d16 0%, #003ecb 52%, #0284c7 100%);

  --border-subtle: rgba(15, 23, 42, 0.075);
  --border-accent: rgba(15, 23, 42, 0.13);
  --border-highlight: rgba(0, 62, 203, 0.34);
  --corner-tick-color: rgba(0, 85, 255, 0.42);
  --inset-specular: inset 0 1px 0 0 rgba(255, 255, 255, 0.95);
  --inset-specular-strong: inset 0 1px 0 0 #ffffff, inset 0 0 18px rgba(0, 85, 255, 0.04);

  /* Hero Tokens - Light Mode */
  --hero-bg-color: #eef3fa;
  --hero-overlay-bg:
    radial-gradient(ellipse 66% 64% at 24% 44%, rgba(246, 248, 251, 0.93) 0%, rgba(246, 248, 251, 0.36) 68%, transparent 100%),
    linear-gradient(90deg, rgba(246, 248, 251, 0.96) 0%, rgba(246, 248, 251, 0.88) 44%, rgba(246, 248, 251, 0.12) 78%, rgba(246, 248, 251, 0.28) 100%),
    linear-gradient(180deg, rgba(246, 248, 251, 0.74) 0%, transparent 22%, transparent 72%, var(--bg-primary) 100%);
  --hero-badge-bg: rgba(255, 255, 255, 0.90);
  --hero-badge-border: rgba(15, 23, 42, 0.14);
  --hero-badge-text: #0f172a;
  --hero-title-color: #071226;
  --hero-subtitle-color: #334155;
  --hero-quote-bg: rgba(255, 255, 255, 0.92);
  --hero-quote-text: #0f172a;
  --hero-metrics-bg: rgba(255, 255, 255, 0.92);
  --hero-metrics-border: rgba(15, 23, 42, 0.12);
  --hero-metric-divider: rgba(15, 23, 42, 0.09);

  --shadow-sm: 0 2px 8px -1px rgba(9, 13, 22, 0.04), 0 1px 2px rgba(9, 13, 22, 0.02), var(--inset-specular);
  --shadow-md: 0 12px 32px -8px rgba(9, 13, 22, 0.06), 0 2px 6px rgba(9, 13, 22, 0.03), var(--inset-specular);
  --shadow-lg: 0 24px 52px -12px rgba(9, 13, 22, 0.09), 0 4px 12px rgba(9, 13, 22, 0.03), var(--inset-specular);
  --shadow-glow: 0 14px 34px -6px rgba(9, 13, 22, 0.08), var(--inset-specular);
}

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

::selection {
  background: rgba(0, 194, 255, 0.24);
  color: #ffffff;
}

[data-theme="light"] ::selection {
  background: rgba(0, 85, 255, 0.14);
  color: #071226;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-optical-sizing: auto;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-feature-settings: "cv02", "cv03", "cv04", "cv11", "ss01";
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--leading-normal);
  letter-spacing: 0.004em;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
}

html[lang="en"] body {
  line-height: 1.60;
  letter-spacing: -0.006em;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--brand-cyan);
  outline-offset: 2px;
}

/* Top Scroll Reading Progress Bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, #0055ff 0%, #38bdf8 65%, #e2e8f0 100%);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.55);
  z-index: 1200;
  transition: width 0.08s linear;
}

/* ==========================================================================
   Architectural Top Studio Beam & Precision Blueprint Grid (Linear / Vercel)
   ========================================================================== */
.ambient-beam {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 640px;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 58% 46% at 50% -8%, rgba(0, 102, 255, 0.16) 0%, rgba(56, 189, 248, 0.05) 52%, transparent 100%);
}

[data-theme="light"] .ambient-beam {
  background:
    radial-gradient(ellipse 58% 46% at 50% -8%, rgba(0, 85, 255, 0.08) 0%, rgba(56, 189, 248, 0.03) 52%, transparent 100%);
}

.ambient-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-size: 64px 64px;
  background-image:
    linear-gradient(to right, rgba(148, 163, 184, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.035) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse 86% 72% at 50% 25%, #000 32%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 86% 72% at 50% 25%, #000 32%, transparent 100%);
}

[data-theme="light"] .ambient-grid {
  background-image:
    linear-gradient(to right, rgba(15, 23, 42, 0.032) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.032) 1px, transparent 1px);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   Tech-Frame Architectural Corner Registration Ticks (Vercel / Linear Style)
   ========================================================================== */
.tech-frame {
  position: relative;
}

.tech-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  border-radius: inherit;
  background: linear-gradient(90deg, transparent 8%, rgba(255, 255, 255, 0.22) 50%, transparent 92%) 0 0 / 100% 1px no-repeat;
  opacity: 0.75;
  transition: opacity 0.3s ease;
}

.tech-frame:hover::before {
  opacity: 0.95;
}

/* ==========================================================================
   Scroll Reveal Choreography & Staggered Cascade (Progressive Enhancement)
   ========================================================================== */
html.js-ready .reveal-up {
  opacity: 0;
  transform: translate3d(0, 20px, 0);
  transition:
    opacity 0.68s var(--ease-out-expo),
    transform 0.68s var(--ease-out-expo);
  transition-delay: calc(var(--stagger-idx, 0) * 60ms);
}

html.js-ready .reveal-up.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* ==========================================================================
   Linear-Style Cursor Border Spotlight + Damped 3D Tilt
   ========================================================================== */
.spotlight-card {
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.spotlight-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(
    320px circle at var(--mouse-x, -500px) var(--mouse-y, -500px),
    rgba(56, 189, 248, 0.68),
    rgba(226, 232, 240, 0.24) 45%,
    transparent 72%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.32s ease;
}

[data-theme="light"] .spotlight-card::after {
  background: radial-gradient(
    320px circle at var(--mouse-x, -500px) var(--mouse-y, -500px),
    rgba(0, 85, 255, 0.52),
    rgba(15, 23, 42, 0.14) 45%,
    transparent 72%
  );
}

.spotlight-card:hover::after {
  opacity: 1;
}

.tilt-card {
  will-change: transform;
}

/* ==========================================================================
   Unified Section Headers & Typography System
   ========================================================================== */
section[id] {
  scroll-margin-top: 76px;
}

.section {
  padding: 112px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.03);
}

.section-header {
  max-width: 820px;
  margin-bottom: 56px;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.subsection-block {
  margin-bottom: 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 14px;
  border-radius: 6px;
  background: rgba(0, 85, 255, 0.10);
  border: 1px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.eyebrow-compact {
  margin-bottom: 10px;
}

[data-theme="light"] .eyebrow {
  background: rgba(0, 85, 255, 0.06);
  color: var(--brand-blue);
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 1.5px;
  background: var(--brand-cyan);
  box-shadow: 0 0 8px var(--brand-cyan);
  flex-shrink: 0;
}

[data-theme="light"] .eyebrow-dot {
  background: var(--brand-blue);
  box-shadow: none;
}

.section-title {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.026em;
  color: var(--text-primary);
  margin-bottom: 16px;
  text-wrap: balance;
}

html[lang="en"] .section-title {
  letter-spacing: -0.034em;
}

.section-title .text-gradient {
  background: var(--brand-metallic);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: var(--text-md);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 66ch;
  text-wrap: pretty;
}

.subsection-title {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: -0.018em;
  color: var(--text-primary);
  text-wrap: balance;
}

.subsection-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.panel-heading {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  color: var(--text-primary);
  text-wrap: balance;
}

.panel-badge {
  margin-bottom: 12px;
}

.panel-lead {
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  text-wrap: pretty;
}

.panel-lead-spaced {
  margin-bottom: 22px;
}

/* ==========================================================================
   Navigation Header & Silvpen Brand Identity Lockup
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 76px;
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: inset 0 -1px 0 0 rgba(255, 255, 255, 0.04);
  transition: height 0.32s var(--ease-out-expo), background-color 0.32s ease, box-shadow 0.32s ease;
}

.site-header.scrolled {
  height: 64px;
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 28px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-logo-mark-wrap {
  width: 40px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, rgba(226, 232, 240, 0.12) 0%, rgba(0, 85, 255, 0.12) 100%);
  border: 1px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

[data-theme="light"] .brand-logo-mark-wrap {
  background: linear-gradient(145deg, #ffffff 0%, rgba(0, 85, 255, 0.08) 100%);
}

.brand-logo:hover .brand-logo-mark-wrap {
  border-color: var(--border-highlight);
  transform: translateY(-1px);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.24);
}

.brand-logo-mark {
  width: 30px;
  height: 24px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
  white-space: nowrap;
}

.brand-cn {
  font-size: var(--text-md);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  line-height: 1.2;
  display: flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
}

.brand-cn-divider {
  width: 1px;
  height: 12px;
  background: var(--border-accent);
  flex-shrink: 0;
}

.brand-cn-full {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

html[lang="en"] .brand-cn-divider,
html[lang="en"] .brand-cn-full {
  display: none;
}

html[lang="en"] .brand-cn {
  font-size: var(--text-base);
  letter-spacing: 0.04em;
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap;
}

/* Precision Pill Navigation Bar */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: 999px;
  background: var(--bg-nav-pill);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  flex-shrink: 0;
}

.nav-link {
  padding: 6px 14px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 999px;
  position: relative;
  white-space: nowrap;
  transition: all 0.22s var(--ease-out-expo);
}

html[lang="en"] .nav-link {
  padding: 6px 12px;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.08);
}

.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
  background: rgba(0, 85, 255, 0.18);
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.14);
}

[data-theme="light"] .nav-link:hover {
  background: rgba(15, 23, 42, 0.05);
}

[data-theme="light"] .nav-link.active {
  color: var(--brand-blue);
  background: #ffffff;
  box-shadow: 0 1px 6px rgba(7, 18, 38, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  white-space: nowrap;
}

.lang-toggle,
.theme-toggle {
  height: 36px;
  padding: 0 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: var(--transition-fast);
  box-shadow: var(--inset-specular);
}

.lang-toggle svg {
  color: var(--text-accent);
  flex-shrink: 0;
}

.lang-toggle:hover,
.theme-toggle:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.theme-icon-wrap {
  position: relative;
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.theme-icon {
  position: absolute;
  inset: 0;
  transition: transform 0.45s var(--ease-spring), opacity 0.3s ease;
}

[data-theme="dark"] .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: #38bdf8;
}

[data-theme="dark"] .icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
  pointer-events: none;
}

[data-theme="light"] .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: #f59e0b;
}

[data-theme="light"] .icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
  pointer-events: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all 0.24s var(--ease-out-expo);
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
}

.btn-lg {
  height: 44px;
  padding: 0 22px;
  font-size: var(--text-base);
  border-radius: 10px;
}

.btn-arrow {
  transition: transform 0.24s var(--ease-out-expo);
  flex-shrink: 0;
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

.btn-primary {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px -2px rgba(0, 85, 255, 0.42), inset 0 1px 0 0 rgba(255, 255, 255, 0.28);
}

.btn-primary:hover {
  transform: translateY(-1.5px);
  box-shadow: 0 8px 24px -2px rgba(0, 140, 255, 0.52), inset 0 1px 0 0 rgba(255, 255, 255, 0.40);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  backdrop-filter: blur(12px);
}

.btn-outline:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  transform: translateY(-1.5px);
}

.mobile-menu-btn {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-fast);
  box-shadow: var(--inset-specular);
}

.mobile-menu-btn .icon-close {
  display: none;
}

.mobile-menu-btn.open {
  border-color: var(--border-highlight);
  color: var(--text-accent);
}

.mobile-menu-btn.open .icon-menu {
  display: none;
}

.mobile-menu-btn.open .icon-close {
  display: block;
}

.mobile-nav-footer,
.mobile-nav-backdrop {
  display: none;
}

/* ==========================================================================
   Hero Section (Architectural Precision & Industrial Telemetry)
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  padding-top: 112px;
  padding-bottom: 52px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background-color: var(--hero-bg-color);
  color: var(--hero-title-color);
  transition: background-color 0.45s ease, color 0.45s ease;
}

.hero > .container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 36px;
  flex: 1;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg .hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  transform: scale(1.02);
  animation: slowZoom 26s ease-in-out infinite alternate;
  transition: opacity 0.7s var(--ease-out-expo);
}

[data-theme="dark"] .hero-img-dark {
  opacity: 0.88;
}

[data-theme="dark"] .hero-img-light {
  opacity: 0;
  pointer-events: none;
}

[data-theme="light"] .hero-img-dark {
  opacity: 0;
  pointer-events: none;
}

[data-theme="light"] .hero-img-light {
  opacity: 0.96;
}

@keyframes slowZoom {
  0% { transform: scale(1.0); }
  100% { transform: scale(1.05); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--hero-overlay-bg);
  z-index: 1;
  transition: background 0.45s ease;
}


.hero-main-grid {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  margin-top: 8px;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--hero-badge-bg);
  border: 1px solid var(--hero-badge-border);
  box-shadow: var(--inset-specular);
  color: var(--hero-badge-text);
  font-size: var(--text-xs);
  font-weight: 500;
  margin-bottom: 22px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-emerald);
  box-shadow: 0 0 10px var(--brand-emerald);
  flex-shrink: 0;
  animation: pulseDot 2.4s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.86); }
}

.hero-badge-code {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-accent);
}

.hero-badge-divider {
  width: 1px;
  height: 12px;
  background: var(--border-accent);
}

.hero-title {
  font-family: var(--font-sans);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.032em;
  color: var(--hero-title-color);
  margin-bottom: 18px;
  text-wrap: balance;
}

html[lang="en"] .hero-title {
  font-size: clamp(2.125rem, 3.3vw, 3.125rem);
  line-height: 1.12;
  letter-spacing: -0.038em;
}

.hero-title .highlight {
  background: var(--brand-hero-highlight);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: var(--text-md);
  color: var(--hero-subtitle-color);
  line-height: var(--leading-relaxed);
  margin-bottom: 22px;
  max-width: 62ch;
  text-wrap: pretty;
}

.hero-quote {
  display: inline-flex;
  align-items: stretch;
  gap: 14px;
  padding: 13px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--hero-quote-bg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.hero-quote-bar {
  width: 3px;
  border-radius: 2px;
  background: var(--brand-gradient);
  flex-shrink: 0;
}

.hero-quote-content {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.hero-quote-meta {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-accent);
}

.hero-quote-text {
  color: var(--hero-quote-text);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: var(--leading-normal);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Architectural Live Telemetry Console (Right-Side Hero HUD Card) */
.hero-hud-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--hero-metrics-bg);
  border: 1px solid var(--hero-metrics-border);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hud-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hero-metric-divider);
}

.hud-title-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.hud-code {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-accent);
}

.hud-heading {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--hero-title-color);
  letter-spacing: -0.015em;
}

.hud-live-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.32);
  color: var(--brand-emerald);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.hud-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-emerald);
  box-shadow: 0 0 8px var(--brand-emerald);
  animation: pulseDot 2s ease-in-out infinite;
}

.hud-telemetry-rows {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hud-row {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  transition: var(--transition-fast);
}

.hud-row:hover {
  border-color: var(--border-accent);
  transform: translateX(2px);
}

.hud-row-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 4px;
}

.hud-row-label {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-primary);
}

.hud-row-val {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-accent);
  font-variant-numeric: tabular-nums;
  padding: 1px 7px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.12);
  border: 1px solid var(--border-accent);
  white-space: nowrap;
}

.hud-row-val.hud-val-emerald {
  color: var(--brand-emerald);
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.28);
}

.hud-row-sub {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.42;
}

.hud-card-footer {
  padding-top: 12px;
  border-top: 1px solid var(--hero-metric-divider);
}

.hud-hub-tags {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.hud-hub-tag {
  text-align: center;
  padding: 4px 6px;
  border-radius: 5px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Hero Telemetry Console (5 Validated Metrics with Monospace Specs) */
.hero-metrics {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  padding: 22px 26px;
  border-radius: var(--radius-lg);
  background: var(--hero-metrics-bg);
  border: 1px solid var(--hero-metrics-border);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-lg);
}

.metric-item {
  position: relative;
  padding-right: 16px;
  border-right: 1px solid var(--hero-metric-divider);
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.24s var(--ease-out-expo);
}

.metric-item:hover {
  transform: translateY(-2px);
}

.metric-item:last-child {
  border-right: none;
  padding-right: 0;
}

.metric-head {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.metric-idx {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-muted);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  font-variant-numeric: tabular-nums;
}

.metric-tag {
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-accent);
  letter-spacing: 0.03em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--hero-title-color);
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 5px;
  white-space: nowrap;
}

.metric-unit {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-accent);
  letter-spacing: 0;
  white-space: nowrap;
}

.metric-unit-emerald {
  color: var(--brand-emerald);
}

.metric-label {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.42;
  margin-bottom: 8px;
}

.metric-spec {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.metric-spec-emerald {
  color: var(--brand-emerald);
}

/* ==========================================================================
   01. About & Enterprise Foundation
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 32px;
  align-items: stretch;
  margin-bottom: 64px;
}

.about-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
}

.about-visual-img-wrap {
  position: relative;
  flex: 1;
  min-height: 340px;
  overflow: hidden;
  border: none;
  border-radius: 0;
}

.visual-hud-tag {
  position: absolute;
  top: 14px;
  left: 16px;
  z-index: 3;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(3, 8, 20, 0.80);
  border: 1px solid rgba(56, 189, 248, 0.34);
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  pointer-events: none;
}

.about-visual-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.65s var(--ease-out-expo);
}

.about-visual-card:hover .about-visual-img-wrap img {
  transform: scale(1.035);
}

.about-visual-caption {
  padding: 20px 24px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.hq-caption-title {
  display: block;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.hq-caption-sub {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

.about-profile-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  justify-content: space-between;
}

.profile-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.profile-row:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translate3d(3px, 0, 0);
}

.profile-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(0, 85, 255, 0.10);
  border: 1px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  color: var(--text-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.profile-meta {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  position: relative;
  z-index: 3;
}

.profile-key-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 3px;
}

.profile-key {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.profile-code {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-accent);
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.08);
  border: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.profile-val {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

/* Three Pillars of Long-Term Value (Page 2 Preface) */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pillar-card {
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.4s var(--ease-out-expo), border-color 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  transform: perspective(1000px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
}

.pillar-card:hover {
  transform: perspective(1000px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)) translateY(-4px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.pillar-img {
  height: 196px;
  overflow: hidden;
  position: relative;
}

.pillar-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 42%, rgba(3, 7, 17, 0.64) 100%);
  pointer-events: none;
}

.pillar-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.65s var(--ease-out-expo);
}

.pillar-card:hover .pillar-img img {
  transform: scale(1.05);
}

.pillar-num {
  position: absolute;
  top: 14px;
  left: 16px;
  z-index: 2;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(3, 7, 17, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.32);
  color: var(--brand-silver);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  backdrop-filter: blur(8px);
}

.pillar-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 3;
}

.pillar-title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.pillar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.pillar-tag {
  font-size: var(--text-2xs);
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 5px;
  background: rgba(0, 85, 255, 0.10);
  border: 1px solid var(--border-subtle);
  color: var(--text-accent);
  white-space: nowrap;
}

.pillar-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  text-wrap: pretty;
  flex: 1;
  margin-bottom: 16px;
}

.pillar-foot {
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-accent);
}

.pillar-foot-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-emerald);
  box-shadow: 0 0 6px var(--brand-emerald);
  flex-shrink: 0;
}

/* Evolution Timeline (Page 6) */
.timeline-box {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  margin-bottom: 64px;
}

.timeline-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.timeline-lead {
  font-size: var(--text-sm);
  color: var(--text-accent);
  font-weight: 600;
}

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

.timeline-steps::before {
  content: "";
  position: absolute;
  top: 38px;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, var(--border-accent) 0%, rgba(56, 189, 248, 0.45) 50%, var(--brand-emerald) 100%);
  opacity: 0.45;
  z-index: 0;
  pointer-events: none;
}

.timeline-step {
  position: relative;
  z-index: 1;
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.timeline-step:hover {
  border-color: var(--border-highlight);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.timeline-step.timeline-step-active {
  border-color: var(--border-accent);
  background: linear-gradient(160deg, rgba(0, 85, 255, 0.09) 0%, var(--bg-secondary) 75%);
}

.timeline-step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.timeline-year {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 5px;
  background: rgba(0, 85, 255, 0.14);
  border: 1px solid var(--border-accent);
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.timeline-phase {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.timeline-step-active .timeline-phase {
  color: var(--brand-emerald);
}

.timeline-step h4 {
  font-size: var(--text-md);
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.timeline-step p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  text-wrap: pretty;
}

/* Cross-functional Organization (Page 10) */
.org-lead {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

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

.org-card {
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.org-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.org-img {
  height: 132px;
  overflow: hidden;
}

.org-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out-expo);
}

.org-card:hover .org-img img {
  transform: scale(1.05);
}

.org-info {
  padding: 18px 20px;
  position: relative;
  z-index: 3;
}

.org-info h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px;
}

.org-info h4 span {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: var(--text-accent);
  font-weight: 500;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.10);
}

.org-info p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

/* ==========================================================================
   02. Integrated Capabilities & 5-Stage Circular Closed-Loop Hub
   ========================================================================== */
.capability-tabs-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.cap-tab-btn {
  position: relative;
  padding: 18px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  text-align: left;
  transition: all 0.25s var(--ease-out-expo);
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
  overflow: hidden;
}

.cap-tab-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-gradient);
  opacity: 0;
  transform: scaleX(0.3);
  transition: opacity 0.28s ease, transform 0.32s var(--ease-out-expo);
}

.cap-tab-btn:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.cap-tab-btn.active {
  background: linear-gradient(155deg, rgba(0, 85, 255, 0.16) 0%, var(--bg-card) 85%);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.cap-tab-btn.active::before {
  opacity: 1;
  transform: scaleX(1);
}

.cap-tab-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-accent);
  letter-spacing: 0.06em;
}

.cap-tab-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.cap-tab-sub {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.38;
}

.capability-panel {
  display: none;
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  animation: fadeInPanel 0.38s var(--ease-out-expo);
}

.capability-panel.active {
  display: block;
}

@keyframes fadeInPanel {
  from {
    opacity: 0;
    transform: translate3d(0, 8px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.cap-panel-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
}

.cap-panel-grid.full {
  grid-template-columns: 1fr;
}

.dual-figure-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.dual-figure-stack .zoomable-figure img {
  width: 100%;
  aspect-ratio: 16 / 9.2;
  object-fit: cover;
}

/* 7-Step Supply Chain Flow (Page 13) */
.step-flow-7 {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
  margin: 26px 0;
}

.flow-node {
  padding: 16px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  position: relative;
  transition: var(--transition-fast);
  min-width: 0;
}

.flow-node:hover {
  border-color: var(--border-highlight);
  transform: translateY(-3px);
}

.flow-node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.flow-node-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.14);
  border: 1px solid var(--border-accent);
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
}

.flow-node-arrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.flow-node h5 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.flow-node p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.48;
}

.cap-badges-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.cap-badges-row.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.cap-badges-row.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.cap-badges-row.no-top-margin {
  margin-top: 0;
}

.cap-mini-card {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  transition: var(--transition-fast);
}

.cap-mini-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.cap-mini-card h5 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 5px;
}

.cap-mini-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.56;
}

/* DCIM Live Telemetry Strip (Page 16 Data) */
.dcim-telemetry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.telemetry-pill {
  padding: 14px 15px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  min-width: 0;
}

.telemetry-pill .t-val {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-accent);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  margin-bottom: 2px;
}

.telemetry-pill .t-lbl {
  font-size: var(--text-2xs);
  color: var(--text-muted);
  line-height: 1.35;
}

/* ==========================================================================
   Ecosystem Synergy Hub & 5-Node Circular Closed-Loop Diagram (环形循环图)
   ========================================================================== */
.ecosystem-synergy-box {
  margin-top: 56px;
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.eco-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.eco-header-sub {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: 0.94fr 1.12fr 0.94fr;
  gap: 24px;
  align-items: stretch;
  margin-top: 28px;
}

.eco-col-heading {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.eco-col-heading.upstream {
  color: var(--text-accent);
}

.eco-col-heading.downstream {
  color: var(--brand-emerald);
}

.eco-column {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  height: calc(100% - 33px);
}

.eco-item {
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  transition: var(--transition-fast);
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eco-item:hover {
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.eco-item-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.eco-item h5 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: var(--leading-snug);
}

.eco-item p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.48;
}

/* Central Hub Card with Circular Closed-Loop Diagram */
.eco-hub-center {
  padding: 20px 18px 18px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 50% 50%, rgba(0, 85, 255, 0.16) 0%, rgba(6, 13, 29, 0.92) 74%),
    var(--bg-secondary);
  border: 1px solid var(--border-highlight);
  text-align: center;
  box-shadow: var(--shadow-glow);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

[data-theme="light"] .eco-hub-center {
  background:
    radial-gradient(circle at 50% 50%, rgba(0, 85, 255, 0.09) 0%, rgba(255, 255, 255, 0.96) 74%),
    #ffffff;
}

.eco-hub-code {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-accent);
}

/* Circular Orbital Stage */
.eco-orbit-diagram {
  position: relative;
  width: 100%;
  max-width: 356px;
  aspect-ratio: 1 / 1;
  margin: 4px auto;
  user-select: none;
}

.eco-orbit-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.orbit-scale-ring {
  stroke: rgba(148, 163, 184, 0.20);
  stroke-width: 1;
  stroke-dasharray: 2 6;
  transform-origin: 190px 190px;
  animation: orbitSpinReverse 38s linear infinite;
}

.orbit-ring-outer {
  stroke: rgba(56, 189, 248, 0.22);
  stroke-width: 1.2;
  stroke-dasharray: 3 6;
}

.orbit-band-channel {
  stroke: rgba(0, 85, 255, 0.10);
  stroke-width: 22;
}

[data-theme="light"] .orbit-band-channel {
  stroke: rgba(0, 85, 255, 0.06);
}

.orbit-band-rim {
  stroke: rgba(56, 189, 248, 0.18);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

[data-theme="light"] .orbit-band-rim {
  stroke: rgba(0, 85, 255, 0.16);
}

.orbit-ring-track {
  stroke-width: 2.2;
  opacity: 0.45;
}

.orbit-comet-primary {
  stroke-width: 3;
  stroke-dasharray: 72 810;
  stroke-linecap: round;
  transform-origin: 190px 190px;
  animation: orbitSpin 10s linear infinite;
}

.orbit-comet-secondary {
  stroke-width: 2;
  stroke-dasharray: 44 838;
  stroke-dashoffset: -440;
  stroke-linecap: round;
  transform-origin: 190px 190px;
  animation: orbitSpin 10s linear infinite;
}

@keyframes orbitSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes orbitSpinReverse {
  0% { transform: rotate(360deg); }
  100% { transform: rotate(0deg); }
}

.orbit-flow-arc {
  stroke: rgba(56, 189, 248, 0.36);
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
  transition: stroke 0.35s ease, stroke-width 0.35s ease, opacity 0.35s ease;
}

[data-theme="light"] .orbit-flow-arc {
  stroke: rgba(0, 85, 255, 0.32);
}

.orbit-flow-arc.is-active-arc {
  stroke: #38bdf8;
  stroke-width: 2.4;
  stroke-dasharray: none;
  filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.72));
}

[data-theme="light"] .orbit-flow-arc.is-active-arc {
  stroke: var(--brand-blue);
  filter: drop-shadow(0 0 4px rgba(0, 85, 255, 0.36));
}

.orbit-sync-beam {
  transform-origin: 190px 190px;
  transition: transform 0.52s var(--ease-out-expo);
}

.orbit-beam-line {
  stroke: rgba(56, 189, 248, 0.48);
  stroke-width: 1.5;
  stroke-dasharray: 3 3;
}

.orbit-beam-pulse {
  stroke: #38bdf8;
  stroke-width: 2.2;
}

.orbit-target-halo {
  stroke: rgba(56, 189, 248, 0.46);
  stroke-width: 1.2;
  fill: rgba(0, 194, 255, 0.09);
}

[data-theme="light"] .orbit-target-halo {
  stroke: rgba(0, 85, 255, 0.38);
  fill: rgba(0, 85, 255, 0.06);
}

.orbit-core-sonar {
  stroke: rgba(56, 189, 248, 0.32);
  stroke-width: 1.2;
  fill: none;
  transform-origin: 190px 190px;
  animation: coreSonarPulse 3.6s ease-out infinite;
}

.orbit-core-sonar.sonar-delay {
  animation-delay: 1.8s;
}

@keyframes coreSonarPulse {
  0% {
    transform: scale(1);
    opacity: 0.65;
  }
  100% {
    transform: scale(1.38);
    opacity: 0;
  }
}

.orbit-ring-inner {
  stroke: var(--border-accent);
  stroke-width: 1.2;
  fill: rgba(3, 8, 20, 0.78);
}

[data-theme="light"] .orbit-ring-inner {
  fill: rgba(255, 255, 255, 0.94);
}

/* Center Core Viewpoint (围绕的核心观点) */
.eco-orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48%;
  height: 48%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 30%, rgba(0, 102, 255, 0.24), rgba(4, 10, 24, 0.94));
  border: 1px solid var(--border-highlight);
  box-shadow: 0 0 28px rgba(0, 102, 255, 0.26), var(--inset-specular);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  z-index: 3;
}

[data-theme="light"] .eco-orbit-core {
  background: radial-gradient(circle at 50% 30%, rgba(0, 85, 255, 0.10), #ffffff);
  box-shadow: 0 8px 24px rgba(7, 18, 38, 0.08);
}

.eco-hub-logo {
  width: 34px;
  height: 26px;
  margin: 0 auto 6px;
  object-fit: contain;
}

.eco-hub-title {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.25;
}

.eco-hub-desc {
  font-size: 0.6875rem;
  color: var(--text-secondary);
  line-height: 1.38;
}

/* 5 Orbital Closed-Loop Nodes Positioned Along the r=140 Circle in 380x380 */
.eco-orbit-node {
  position: absolute;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--bg-primary);
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.28s var(--ease-out-expo);
}

/* Exact Pentagonal Coordinates around (50%, 50%) for r=140/380 */
.eco-orbit-node.node-1 {
  top: 13.2%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.eco-orbit-node.node-2 {
  top: 38.6%;
  left: 84%;
  transform: translate(-50%, -50%);
}

.eco-orbit-node.node-3 {
  top: 79.8%;
  left: 71.6%;
  transform: translate(-50%, -50%);
}

.eco-orbit-node.node-4 {
  top: 79.8%;
  left: 28.4%;
  transform: translate(-50%, -50%);
}

.eco-orbit-node.node-5 {
  top: 38.6%;
  left: 16%;
  transform: translate(-50%, -50%);
}

.orbit-node-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--brand-gradient);
  padding: 1px 6px;
  border-radius: 999px;
  line-height: 1.35;
}

.orbit-node-txt {
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-primary);
}

.eco-orbit-node:hover,
.eco-orbit-node.is-active-node {
  border-color: var(--brand-cyan);
  background: var(--bg-card-hover);
  box-shadow: 0 0 18px rgba(0, 194, 255, 0.38), var(--inset-specular);
  transform: translate(-50%, -50%) scale(1.06);
}

[data-theme="light"] .eco-orbit-node:hover,
[data-theme="light"] .eco-orbit-node.is-active-node {
  border-color: var(--brand-blue);
  background: #ffffff;
  box-shadow: 0 6px 18px rgba(0, 85, 255, 0.22);
}

.eco-orbit-caption {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  width: 100%;
}

/* Industry Scenarios Grid (Page 18) */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.scenario-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  transition: transform 0.38s var(--ease-out-expo), border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: perspective(1000px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
}

.scenario-card:hover {
  transform: perspective(1000px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)) translateY(-4px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.scenario-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
  position: relative;
  z-index: 3;
}

.scenario-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(0, 85, 255, 0.10);
  border: 1px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  color: var(--text-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.scenario-idx {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  letter-spacing: 0.05em;
}

.scenario-card h4 {
  font-size: var(--text-md);
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  line-height: var(--leading-snug);
  position: relative;
  z-index: 3;
}

.scenario-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  position: relative;
  z-index: 3;
  text-wrap: pretty;
  flex: 1;
  margin-bottom: 16px;
}

.scenario-meta {
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-accent);
  position: relative;
  z-index: 3;
}

/* ==========================================================================
   03. National Footprint & Multi-Region Projects (Pages 8, 20)
   ========================================================================== */
.region-filter-bar {
  margin-bottom: 28px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.project-card {
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  padding: 30px;
  transition:
    transform 0.4s var(--ease-out-expo),
    border-color 0.3s ease,
    box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: perspective(1000px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
}

.project-card:hover {
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
  transform: perspective(1000px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)) translateY(-4px);
}

.project-card.featured {
  border-color: var(--border-accent);
  background: linear-gradient(160deg, rgba(0, 85, 255, 0.08) 0%, var(--bg-card) 65%);
}

.project-card.is-hidden {
  display: none !important;
}

.project-card.is-filtering-in {
  animation: fadeInPanel 0.35s var(--ease-out-expo);
}

.project-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
  position: relative;
  z-index: 3;
}

.project-region-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  background: rgba(0, 85, 255, 0.10);
  color: var(--text-accent);
  border: 1px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  white-space: nowrap;
  flex-shrink: 0;
}

.project-scale-pill {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--brand-emerald);
  padding: 3px 9px;
  border-radius: 5px;
  background: rgba(16, 185, 129, 0.10);
  border: 1px solid rgba(16, 185, 129, 0.26);
}

.project-head-group {
  margin-bottom: 10px;
  position: relative;
  z-index: 3;
}

.project-type {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.project-title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.project-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: 22px;
  line-height: var(--leading-normal);
  position: relative;
  z-index: 3;
  text-wrap: pretty;
}

.project-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 3;
}

.project-kpi {
  background: var(--bg-secondary);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  min-width: 0;
}

.project-kpi-val {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-accent);
  font-variant-numeric: tabular-nums;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-kpi-lbl {
  font-size: var(--text-2xs);
  color: var(--text-muted);
  line-height: 1.35;
}

.verified-caps-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.verified-caps-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.verified-cap-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  border-radius: 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
}

.verified-cap-pill svg {
  color: var(--brand-emerald);
  flex-shrink: 0;
}

/* ==========================================================================
   04. Flagship Case Study Deep-Dive: Central China Intelligent Computing Center
   ========================================================================== */
.flagship-banner {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  margin-bottom: 32px;
  box-shadow: var(--shadow-lg);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.flagship-banner-img {
  position: absolute;
  inset: 0;
  height: 100%;
  width: 100%;
  object-fit: cover;
  z-index: 0;
  transition: transform 0.8s var(--ease-out-expo);
}

.flagship-banner:hover .flagship-banner-img {
  transform: scale(1.025);
}

.flagship-banner-overlay {
  position: relative;
  z-index: 1;
  background: linear-gradient(0deg, rgba(2, 6, 15, 0.95) 0%, rgba(2, 6, 15, 0.56) 62%, rgba(2, 6, 15, 0.18) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 110px 36px 32px;
}

.flagship-banner-badge {
  width: fit-content;
  margin-bottom: 10px;
  background: rgba(0, 194, 255, 0.16);
  color: #bae6fd;
  border-color: rgba(56, 189, 248, 0.36);
}

.flagship-banner-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.flagship-stats-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.flagship-stat-box {
  padding: 15px 16px;
  border-radius: var(--radius-md);
  background: rgba(6, 15, 34, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.24);
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  min-width: 0;
}

.flagship-stat-box .val {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: #ffffff;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.flagship-stat-box .val span {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: #38bdf8;
  margin-left: 4px;
}

.flagship-stat-box .lbl {
  font-size: var(--text-2xs);
  color: #cbd5e1;
  margin-top: 4px;
  line-height: 1.35;
}

/* Engineering Deep-Dive Sub-navigation */
.eng-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.eng-tabs.eng-tabs-6 {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}

.eng-tab {
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all 0.22s var(--ease-out-expo);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.eng-tab:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.eng-tab.active {
  background: var(--brand-gradient);
  color: #ffffff;
  font-weight: 600;
  border-color: transparent;
  box-shadow: 0 4px 14px -2px rgba(0, 85, 255, 0.40), inset 0 1px 0 0 rgba(255, 255, 255, 0.24);
}

.eng-panel {
  display: none;
  padding: 34px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  animation: fadeInPanel 0.36s var(--ease-out-expo);
}

.eng-panel.active {
  display: block;
}

.eng-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: center;
}

.zoomable-figure {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
  background: var(--bg-primary);
}

.zoomable-figure img {
  width: 100%;
  height: auto;
  transition: transform 0.5s var(--ease-out-expo);
}

.zoomable-figure:hover img {
  transform: scale(1.025);
}

.zoom-hint {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(3, 8, 20, 0.78);
  color: #f8fafc;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  border: 1px solid rgba(56, 189, 248, 0.36);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  pointer-events: none;
  opacity: 0.88;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.zoomable-figure:hover .zoom-hint {
  opacity: 1;
  transform: translateY(-1px);
}

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-item {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  transition: var(--transition-fast);
}

.spec-item:hover {
  border-color: var(--border-accent);
}

.spec-item h5 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  line-height: var(--leading-snug);
}

.spec-item h5 span {
  color: var(--text-accent);
  font-size: var(--text-2xs);
  font-family: var(--font-mono);
  padding: 1px 7px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.10);
  border: 1px solid var(--border-subtle);
}

.spec-item p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

/* Power Topology Interactive Diagram (Pages 25-26) */
.power-header-box {
  margin-bottom: 22px;
}

.power-topology {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.power-stage {
  padding: 20px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  text-align: center;
  position: relative;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

.power-stage:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
}

.power-stage-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.power-stage h5 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
  line-height: var(--leading-snug);
}

.power-stage p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.5;
}

.ab-bus-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 9px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  color: var(--brand-emerald);
  border: 1px solid rgba(16, 185, 129, 0.28);
  white-space: nowrap;
}

.power-bus-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.bus-channel {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.bus-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.14);
  color: var(--text-accent);
  white-space: nowrap;
}

.bus-b .bus-tag {
  background: rgba(16, 185, 129, 0.14);
  color: var(--brand-emerald);
}

.bus-flow {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* Flagship Synthesis Matrix (Page 31) */
.insights-matrix {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.insight-col {
  padding: 26px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.insight-col-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  z-index: 3;
}

.insight-num {
  padding: 3px 9px;
  border-radius: 5px;
  background: rgba(0, 85, 255, 0.14);
  border: 1px solid var(--border-accent);
  color: var(--text-accent);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  flex-shrink: 0;
}

.insight-col-head h4 {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
}

.insight-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 3;
}

.insight-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--border-accent);
  box-shadow: var(--inset-specular);
  transition: var(--transition-fast);
}

.insight-item:hover {
  border-color: var(--border-accent);
  border-left-color: var(--brand-cyan);
  transform: translateX(2px);
}

.insight-item strong {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.insight-item span {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   05. Contact & Business Cooperation (info@silvpen.com + Other Option)
   ========================================================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.12fr;
  gap: 36px;
  align-items: stretch;
}

.contact-info-card {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, rgba(0, 85, 255, 0.09) 0%, var(--bg-card) 68%);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-brand-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.contact-brand-logo-wrap {
  width: 48px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(226, 232, 240, 0.08);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-brand-logo {
  width: 36px;
  height: 28px;
  object-fit: contain;
}

.contact-brand-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.contact-brand-en {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.contact-card-lead {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0;
}

.channel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  gap: 12px;
  transition: var(--transition-fast);
}

.channel-row:hover {
  border-color: var(--border-accent);
}

.channel-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.channel-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(0, 85, 255, 0.10);
  border: 1px solid var(--border-subtle);
  color: var(--text-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.channel-lbl {
  font-size: var(--text-2xs);
  color: var(--text-muted);
  margin-bottom: 2px;
}

.channel-val {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.copy-btn {
  padding: 5px 12px;
  border-radius: 6px;
  font-size: var(--text-2xs);
  font-weight: 600;
  background: rgba(0, 85, 255, 0.10);
  color: var(--text-accent);
  border: 1px solid var(--border-accent);
  transition: var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--brand-blue);
  color: #fff;
  border-color: transparent;
}

.qr-box {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
}

.qr-box img {
  width: 84px;
  height: 84px;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 4px;
  flex-shrink: 0;
  border: 1px solid var(--border-subtle);
}

.qr-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.qr-desc {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.52;
}

.contact-form-card {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.form-card-header {
  margin-bottom: 22px;
}

.form-response-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 5px;
  background: rgba(16, 185, 129, 0.10);
  border: 1px solid rgba(16, 185, 129, 0.28);
  color: var(--brand-emerald);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-emerald);
}

.form-card-sub {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: var(--leading-normal);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 14px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px;
}

.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.quick-tags-hint {
  font-size: var(--text-2xs);
  color: var(--text-muted);
}

.quick-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}

.quick-tag-chip {
  padding: 5px 11px;
  border-radius: 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  transition: all 0.2s var(--ease-out-expo);
}

.quick-tag-chip:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.quick-tag-chip.active {
  background: rgba(0, 85, 255, 0.16);
  border-color: var(--brand-cyan);
  color: var(--text-primary);
}

[data-theme="light"] .quick-tag-chip.active {
  background: rgba(0, 85, 255, 0.10);
  border-color: var(--brand-blue);
  color: var(--brand-blue);
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--text-sm);
  transition: all 0.22s var(--ease-out-expo);
}

select.form-control {
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2338bdf8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

[data-theme="light"] select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%230055ff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

.form-control:hover {
  border-color: var(--border-accent);
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(0, 85, 255, 0.16);
  background: var(--bg-primary);
}

textarea.form-control {
  min-height: 108px;
  resize: vertical;
  line-height: var(--leading-normal);
}

.btn-submit {
  width: 100%;
  height: 44px;
  font-size: var(--text-base);
  border-radius: var(--radius-sm);
  margin-top: 4px;
}

.form-feedback-box {
  display: none;
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.10);
  border: 1px solid rgba(16, 185, 129, 0.36);
  color: var(--text-primary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  animation: fadeInPanel 0.32s var(--ease-out-expo);
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.feedback-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--brand-gradient);
  color: #ffffff;
  transition: var(--transition-fast);
}

.feedback-action-btn.secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-accent);
}

/* ==========================================================================
   Floating Quick-Action Dock & Footer & Lightbox Modal
   ========================================================================== */
.floating-dock {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 950;
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  pointer-events: none;
  transition: opacity 0.32s var(--ease-out-expo), transform 0.32s var(--ease-out-expo);
}

.floating-dock.visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
}

.floating-dock.dock-hidden-scroll {
  opacity: 0;
  transform: translate3d(0, 20px, 0);
  pointer-events: none;
}

.dock-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.22s var(--ease-out-expo);
}

.dock-btn:hover {
  background: var(--brand-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: translateY(-2px);
}

.site-footer {
  background: #02050d;
  color: #94a3b8;
  padding: 72px 0 36px;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  position: relative;
  z-index: 2;
  transition: background-color 0.4s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
}

[data-theme="light"] .site-footer {
  background: #0b1426;
  border-top-color: rgba(15, 23, 42, 0.14);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.footer-brand-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.footer-brand-logo-wrap {
  width: 40px;
  height: 34px;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.20);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-brand-logo {
  width: 30px;
  height: 22px;
  object-fit: contain;
}

.footer-brand-cn {
  color: #ffffff;
  font-weight: 700;
  font-size: var(--text-md);
}

.footer-brand-en {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: #64748b;
  margin-top: 2px;
}

.footer-desc-text {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  margin-bottom: 14px;
  color: #94a3b8;
}

.footer-slogan-text {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: #38bdf8;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.footer-col h5 {
  color: #ffffff;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col li {
  font-size: var(--text-sm);
}

.footer-col a {
  font-size: var(--text-sm);
  color: #94a3b8;
}

.footer-col a:hover {
  color: #38bdf8;
}

.footer-highlight-white {
  color: #ffffff !important;
  font-family: var(--font-mono);
  font-weight: 600;
}

.footer-highlight-cyan {
  color: #38bdf8 !important;
  font-family: var(--font-mono);
  font-weight: 600;
}

.footer-bottom {
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: var(--text-xs);
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(2, 6, 15, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox-modal.open {
  display: flex;
  animation: fadeInPanel 0.25s var(--ease-out-expo);
}

.lightbox-content {
  max-width: 92vw;
  max-height: 88vh;
  position: relative;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 82vh;
  border-radius: var(--radius-md);
  border: 1px solid rgba(56, 189, 248, 0.36);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.85);
}

.lightbox-caption {
  text-align: center;
  color: #e2e8f0;
  margin-top: 14px;
  font-size: var(--text-sm);
  font-weight: 500;
}

.lightbox-close {
  position: absolute;
  top: -44px;
  right: 0;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.20);
  transition: var(--transition-fast);
}

.lightbox-close:hover {
  background: var(--brand-blue);
  border-color: transparent;
}

/* ==========================================================================
   Reduced Motion Accessibility Support
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal-up {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ==========================================================================
   Responsive Breakpoints & Mobile-Friendly Ergonomics
   ========================================================================== */
@media (hover: none) {
  .spotlight-card::after {
    display: none !important;
  }
  .pillar-card,
  .project-card,
  .scenario-card {
    transform: none !important;
  }
  .btn:active,
  .cap-tab-btn:active,
  .eng-tab:active,
  .copy-btn:active,
  .dock-btn:active,
  .lang-toggle:active,
  .theme-toggle:active,
  .quick-tag-chip:active,
  .mobile-menu-btn:active {
    transform: scale(0.97);
  }
}

@media (max-width: 1220px) {
  .brand-cn-divider,
  .brand-cn-full {
    display: none;
  }
  .step-flow-7 {
    grid-template-columns: repeat(4, 1fr);
  }
  .step-flow-7 .flow-node:last-child {
    grid-column: span 2;
  }
}

@media (max-width: 1120px) {
  .hero-main-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero-metrics {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-grid,
  .cap-panel-grid,
  .eng-layout,
  .contact-wrapper,
  .ecosystem-grid,
  .power-bus-summary {
    grid-template-columns: 1fr;
  }
  .eco-column {
    height: auto;
  }
  .cap-badges-row,
  .cap-badges-row.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline-steps,
  .org-grid,
  .scenarios-grid,
  .flagship-stats-row,
  .insights-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline-steps::before {
    display: none;
  }
  .power-topology {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablet & Mobile Navigation Drawer + Horizontal Swipeable Tab Bars */
@media (max-width: 960px) {
  .nav-cta-desktop {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    border-radius: 0 0 18px 18px;
    max-height: calc(100vh - 64px);
    max-height: calc(100dvh - 64px);
    overflow-y: auto;
    background: var(--bg-glass);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 20px calc(22px + env(safe-area-inset-bottom, 0px));
    border-bottom: 1px solid var(--border-accent);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    animation: slideDownNav 0.25s var(--ease-out-expo);
  }

  .nav-links.open {
    display: flex;
  }

  @keyframes slideDownNav {
    from {
      opacity: 0;
      transform: translate3d(0, -8px, 0);
    }
    to {
      opacity: 1;
      transform: translate3d(0, 0, 0);
    }
  }

  .nav-link,
  html[lang="en"] .nav-link {
    padding: 12px 16px;
    font-size: var(--text-base);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .nav-link.active::after {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand-cyan);
  }

  .mobile-nav-footer {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
  }

  .nav-cta-mobile {
    width: 100%;
    height: 44px;
    font-size: var(--text-base);
    border-radius: var(--radius-sm);
  }

  .mobile-nav-quick {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .mobile-quick-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: var(--text-2xs);
    font-weight: 600;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .mobile-quick-link svg {
    color: var(--text-accent);
    flex-shrink: 0;
  }

  .mobile-nav-backdrop.open {
    display: block;
    position: fixed;
    inset: 0;
    top: 64px;
    background: rgba(2, 6, 15, 0.58);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 995;
  }

  .capability-tabs-nav {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 10px;
    margin-bottom: 20px;
    padding: 2px 4px 6px;
    mask-image: linear-gradient(to right, #000 92%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, #000 92%, transparent 100%);
  }

  .capability-tabs-nav::-webkit-scrollbar {
    display: none;
  }

  .cap-tab-btn {
    flex: 0 0 216px;
    scroll-snap-align: start;
    padding: 14px 16px;
  }

  .eng-tabs,
  .eng-tabs.eng-tabs-6 {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 8px;
    padding: 2px 4px 6px;
    margin-bottom: 20px;
    mask-image: linear-gradient(to right, #000 92%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, #000 92%, transparent 100%);
  }

  .eng-tabs::-webkit-scrollbar {
    display: none;
  }

  .eng-tab {
    flex: 0 0 auto;
    scroll-snap-align: start;
    padding: 9px 15px;
    font-size: var(--text-xs);
  }

  .pillars-grid,
  .projects-grid,
  .insights-matrix {
    grid-template-columns: 1fr;
  }
}

/* Mobile Landscape & Phablet Viewports (<= 768px) */
@media (max-width: 768px) {
  section[id] {
    scroll-margin-top: 64px;
  }

  .site-header,
  .site-header.scrolled {
    height: 64px;
  }

  .container,
  .nav-container {
    padding: 0 18px;
  }

  .section {
    padding: 68px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .subsection-block {
    margin-bottom: 44px;
  }

  .section-title,
  html[lang="en"] .section-title {
    font-size: clamp(1.56rem, 5.2vw, 2.05rem);
    margin-bottom: 12px;
  }

  .section-desc {
    font-size: var(--text-base);
    line-height: var(--leading-normal);
  }

  .hero {
    min-height: 100svh;
    padding-top: 86px;
    padding-bottom: 36px;
  }

  .hero > .container {
    gap: 24px;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 16px;
    padding: 18px;
    border-radius: var(--radius-md);
  }

  .metric-item {
    border-right: none;
    border-bottom: 1px solid var(--hero-metric-divider);
    padding-right: 0;
    padding-bottom: 12px;
  }

  .metric-item:nth-child(odd):not(:last-child) {
    border-right: 1px solid var(--hero-metric-divider);
    padding-right: 12px;
  }

  .metric-item:last-child {
    grid-column: 1 / -1;
    border-bottom: none;
    padding-bottom: 0;
  }

  .timeline-steps,
  .scenarios-grid,
  .cap-badges-row,
  .cap-badges-row.cols-2,
  .cap-badges-row.cols-4,
  .power-topology,
  .form-grid,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .step-flow-7 {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0;
  }

  .flow-node:last-child {
    grid-column: 1 / -1;
  }

  .dcim-telemetry-grid,
  .project-kpis,
  .eco-column {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .flagship-banner-overlay {
    padding: 64px 20px 20px;
  }

  .flagship-stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 16px;
  }

  .flagship-stat-box:last-child {
    grid-column: 1 / -1;
  }

  .timeline-box,
  .capability-panel,
  .ecosystem-synergy-box,
  .project-card,
  .eng-panel,
  .insight-col,
  .contact-info-card,
  .contact-form-card {
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }

  .form-control {
    font-size: 16px;
    padding: 12px 14px;
  }

  select.form-control {
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2338bdf8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* Standard & Compact Smartphone Viewports (<= 540px) */
@media (max-width: 540px) {
  .container,
  .nav-container {
    padding: 0 16px;
  }

  .brand-logo {
    gap: 9px;
    min-width: 0;
  }

  .brand-logo-mark-wrap {
    width: 34px;
    height: 30px;
  }

  .brand-logo-mark {
    width: 26px;
    height: 20px;
  }

  .brand-cn,
  html[lang="en"] .brand-cn {
    font-size: var(--text-base);
  }

  .brand-en {
    font-size: 0.52rem;
    letter-spacing: 0.06em;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nav-actions {
    gap: 6px;
  }

  .lang-toggle {
    height: 34px;
    padding: 0 10px;
    font-size: var(--text-2xs);
    gap: 5px;
  }

  .theme-toggle {
    width: 34px;
    height: 34px;
    padding: 0;
  }

  #theme-label {
    display: none;
  }

  .mobile-menu-btn {
    width: 34px;
    height: 34px;
  }

  .mobile-nav-quick {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .section {
    padding: 52px 0;
  }

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

  .eyebrow {
    padding: 4px 10px;
    gap: 6px;
    margin-bottom: 12px;
    max-width: 100%;
    white-space: normal;
    line-height: 1.35;
  }

  .hero-badge {
    padding: 6px 10px;
    line-height: 1.4;
    margin-bottom: 14px;
  }

  .hero-badge-code,
  .hero-badge-divider {
    display: none;
  }

  .hero-title {
    font-size: clamp(1.68rem, 6.8vw, 2.12rem);
    line-height: 1.2;
    margin-bottom: 14px;
  }

  html[lang="en"] .hero-title {
    font-size: clamp(1.5rem, 6vw, 1.9rem);
    line-height: 1.18;
  }

  .hero-subtitle {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    margin-bottom: 14px;
  }

  .hero-quote {
    padding: 10px 14px;
    gap: 10px;
    margin-bottom: 20px;
  }

  .hero-cta-group {
    flex-direction: column;
    gap: 10px;
  }

  .hero-cta-group .btn {
    width: 100%;
    height: 44px;
  }

  .hero-metrics {
    padding: 16px 14px;
    gap: 12px;
  }

  .about-grid {
    gap: 22px;
    margin-bottom: 40px;
  }

  .about-visual-img-wrap {
    min-height: 215px;
  }

  .about-visual-caption {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
    gap: 10px;
  }

  .profile-row {
    padding: 14px 16px;
    gap: 12px;
  }

  .pillars-grid {
    gap: 18px;
  }

  .pillar-img {
    height: 160px;
  }

  .pillar-body {
    padding: 18px;
  }

  .timeline-box {
    padding: 20px 16px;
    margin-bottom: 40px;
  }

  .timeline-header {
    margin-bottom: 20px;
    gap: 8px;
  }

  .timeline-step {
    padding: 18px 16px;
  }

  .org-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .org-card {
    display: flex;
    align-items: stretch;
  }

  .org-img {
    width: 106px;
    height: auto;
    min-height: 102px;
    flex-shrink: 0;
  }

  .org-info {
    padding: 14px 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .cap-tab-btn {
    flex: 0 0 196px;
    padding: 12px 14px;
  }

  .capability-panel,
  .ecosystem-synergy-box,
  .project-card,
  .eng-panel,
  .insight-col,
  .contact-info-card,
  .contact-form-card {
    padding: 20px 16px;
  }

  .ecosystem-synergy-box {
    margin-top: 36px;
  }

  .eco-hub-center {
    padding: 18px 12px;
  }

  .eco-orbit-diagram {
    max-width: 300px;
  }

  .eco-orbit-node {
    padding: 4px 8px;
    gap: 4px;
  }

  .orbit-node-num {
    font-size: 0.625rem;
    padding: 1px 5px;
  }

  .orbit-node-txt {
    font-size: 0.6875rem;
  }

  .eco-hub-title {
    font-size: 0.75rem;
  }

  .eco-hub-desc {
    font-size: 0.625rem;
  }

  .scenarios-grid {
    gap: 14px;
    margin-top: 28px;
  }

  .scenario-card {
    padding: 20px 18px;
  }

  .projects-grid {
    gap: 18px;
    margin-bottom: 32px;
  }

  .verified-caps-bar {
    padding: 16px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .verified-caps-title {
    grid-column: 1 / -1;
    margin-bottom: 4px;
  }

  .verified-cap-pill {
    justify-content: center;
    padding: 8px 10px;
  }

  .flagship-banner {
    min-height: 280px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
  }

  .flagship-banner-overlay {
    padding: 48px 16px 16px;
  }

  .flagship-stat-box {
    padding: 12px 14px;
  }

  .spec-item {
    padding: 14px 15px;
  }

  .power-stage {
    padding: 16px;
    text-align: left;
    align-items: flex-start;
  }

  .insights-matrix {
    margin-top: 28px;
    gap: 16px;
  }

  .contact-wrapper {
    gap: 24px;
  }

  .contact-channels {
    gap: 10px;
    margin: 20px 0;
  }

  .channel-row {
    padding: 12px 13px;
    gap: 8px;
  }

  .qr-box {
    padding: 14px 15px;
    gap: 14px;
  }

  .qr-box img {
    width: 76px;
    height: 76px;
  }

  .quick-tags-wrap {
    gap: 6px;
  }

  .feedback-actions {
    flex-direction: column;
  }

  .feedback-action-btn {
    width: 100%;
    justify-content: center;
    padding: 10px 14px;
  }

  .floating-dock {
    right: 14px;
    bottom: calc(18px + env(safe-area-inset-bottom, 0px));
    gap: 8px;
  }

  .dock-btn {
    width: 40px;
    height: 40px;
  }

  .site-footer {
    padding: 48px 0 calc(28px + env(safe-area-inset-bottom, 0px));
  }

  .footer-top {
    gap: 28px;
    padding-bottom: 32px;
  }

  .lightbox-modal {
    padding: 14px;
  }

  .lightbox-content {
    max-width: 95vw;
  }

  .lightbox-close {
    top: -40px;
    right: 0;
  }
}

/* Ultra-Narrow Smartphone Screens (<= 370px) */
@media (max-width: 370px) {
  .brand-en {
    display: none;
  }

  .hero-metrics,
  .step-flow-7,
  .dcim-telemetry-grid,
  .project-kpis,
  .eco-column,
  .verified-caps-bar,
  .flagship-stats-row {
    grid-template-columns: 1fr;
  }

  .metric-item:nth-child(odd):not(:last-child) {
    border-right: none;
    padding-right: 0;
  }

  .org-card {
    flex-direction: column;
  }

  .org-img {
    width: 100%;
    height: 120px;
  }
}

/* ==========================================================================
   Native Dual-Theme 3-Stage Vector Strip & Interactive PUE 1.27 Calculator
   ========================================================================== */
.phased-vector-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.phased-vector-node {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: var(--transition-fast);
}

.phased-vector-node:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.phased-vector-node.pv-node-highlight {
  border-color: var(--border-accent);
  background: linear-gradient(155deg, rgba(0, 85, 255, 0.08) 0%, var(--bg-secondary) 80%);
}

.pv-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}

.pv-badge {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-accent);
}

.pv-arrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--brand-emerald);
  font-weight: 700;
}

.pv-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
}

.pv-meta {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.pue-calc-card {
  margin-top: 32px;
  padding: 32px 34px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-md);
}

.pue-calc-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.pue-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pue-preset-btn {
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 600;
  transition: var(--transition-fast);
}

.pue-preset-btn:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.pue-preset-btn.active {
  background: var(--brand-gradient);
  color: #ffffff;
  border-color: transparent;
}

.pue-calc-body {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  align-items: center;
}

.pue-slider-col {
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
}

.pue-slider-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.pue-slider-label-row label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.pue-slider-val {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-accent);
  font-variant-numeric: tabular-nums;
}

.pue-slider-val small {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.pue-range-input {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  accent-color: var(--brand-blue);
  cursor: pointer;
  margin-bottom: 12px;
}

.pue-slider-ticks {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: var(--text-2xs);
  color: var(--text-muted);
}

.pue-results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.pue-res-box {
  padding: 15px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--inset-specular);
}

.pue-res-box.highlight {
  border-color: rgba(16, 185, 129, 0.34);
  background: linear-gradient(155deg, rgba(16, 185, 129, 0.08) 0%, var(--bg-secondary) 85%);
}

.pue-res-lbl {
  font-size: var(--text-2xs);
  color: var(--text-muted);
  margin-bottom: 4px;
}

.pue-res-val {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  margin-bottom: 2px;
}

.pue-res-box.highlight .pue-res-val {
  color: var(--brand-emerald);
}

.pue-res-val small {
  font-family: var(--font-sans);
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.pue-res-sub {
  font-size: var(--text-2xs);
  color: var(--text-secondary);
}

.footer-legal-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-legal-sep {
  color: #475569;
}

.footer-brochure-link {
  color: #38bdf8 !important;
  font-weight: 600;
}

.footer-brochure-link:hover {
  text-decoration: underline;
}

.phased-vector-strip.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1120px) {
  .pue-calc-body {
    grid-template-columns: 1fr;
  }
  .phased-vector-strip.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .phased-vector-strip,
  .phased-vector-strip.cols-4,
  .pue-results-grid {
    grid-template-columns: 1fr;
  }
  .pue-calc-card {
    padding: 22px 18px;
  }
}

/* ==========================================================================
   v6.5 Architectural Luxury & Editorial Restraint Tokens (Merged & Clean)
   ========================================================================== */
[data-theme="light"] .tech-frame::before {
  background: linear-gradient(90deg, transparent 8%, rgba(15, 23, 42, 0.12) 50%, transparent 92%) 0 0 / 100% 1px no-repeat;
}

.eyebrow,
.project-region-badge,
.pillar-tag,
.timeline-year,
.flow-node-idx,
.insight-num,
.org-info h4 span,
.spec-item h4 span {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

[data-theme="light"] .eyebrow,
[data-theme="light"] .project-region-badge,
[data-theme="light"] .pillar-tag,
[data-theme="light"] .timeline-year,
[data-theme="light"] .flow-node-idx,
[data-theme="light"] .insight-num,
[data-theme="light"] .org-info h4 span,
[data-theme="light"] .spec-item h4 span {
  background: #f1f5f9;
  border: 1px solid rgba(15, 23, 42, 0.08);
  color: #1e293b;
}

.eyebrow {
  border-radius: 999px;
  padding: 5px 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.btn-primary {
  background: var(--brand-gradient);
  box-shadow: 0 2px 10px rgba(0, 64, 191, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

[data-theme="light"] .btn-primary {
  background: linear-gradient(180deg, #0f172a 0%, #090d16 100%);
  box-shadow: 0 4px 14px rgba(9, 13, 22, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

[data-theme="light"] .btn-primary:hover {
  background: linear-gradient(180deg, #0044cc 0%, #0035a3 100%);
  box-shadow: 0 6px 20px rgba(0, 68, 204, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding: 0 14px;
  font-size: var(--text-sm);
  font-weight: 500;
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.08);
}

.pillar-card:hover,
.project-card:hover,
.scenario-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-md);
}

.hero-quote {
  padding: 10px 16px;
  background: transparent;
  border: none;
  border-left: 2px solid var(--text-accent);
  border-radius: 0;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  margin-bottom: 26px;
}

.hero-quote-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-style: normal;
}

.pillar-foot,
.scenario-meta {
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   World-Class Audit Upgrades: Heading Hierarchy (h4/h5), PUE Tariffs & Privacy Modal
   ========================================================================== */
.flow-node h4,
.cap-mini-card h4,
.spec-item h4,
.power-stage h4,
.qr-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

.spec-item h4 {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.spec-item h4 span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 5px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--border-accent);
  color: var(--text-accent);
}

[data-theme="light"] .spec-item h4 span {
  background: #f1f5f9 !important;
  border: 1px solid rgba(15, 23, 42, 0.08) !important;
  color: #1e293b !important;
}

.site-footer .footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.pue-calc-footer {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.pue-tariff-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.pue-tariff-lbl {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 500;
}

.pue-tariff-btn {
  padding: 5px 11px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 500;
  transition: var(--transition-fast);
}

.pue-tariff-btn:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.pue-tariff-btn.active {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.42);
  color: var(--brand-emerald);
  font-weight: 600;
}

.pue-calc-note {
  width: 100%;
  font-size: var(--text-2xs);
  color: var(--text-muted);
  line-height: 1.5;
}

.privacy-consent-row {
  margin: 14px 0 18px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.55;
}

.privacy-consent-row input[type="checkbox"] {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  accent-color: var(--brand-blue);
  cursor: pointer;
  flex-shrink: 0;
}

.privacy-link-btn {
  color: var(--text-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.privacy-link-btn:hover {
  opacity: 0.85;
}

.privacy-modal {
  position: fixed;
  inset: 0;
  z-index: 2100;
  background: rgba(2, 6, 15, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.privacy-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.privacy-modal-card {
  width: 100%;
  max-width: 680px;
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.privacy-modal-head {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.privacy-modal-head h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.privacy-modal-body {
  padding: 22px 24px;
  overflow-y: auto;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.privacy-modal-body h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 4px;
}

.privacy-modal-foot {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.privacy-modal-head .lightbox-close {
  position: static;
  flex-shrink: 0;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  min-height: 36px;
}

.privacy-modal-head .lightbox-close:hover {
  color: #ffffff;
  background: var(--brand-blue);
  border-color: transparent;
}

.project-card-foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
}

.project-inquire-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-accent);
  padding: 5px 12px;
  border-radius: 6px;
  background: rgba(0, 85, 255, 0.08);
  border: 1px solid var(--border-accent);
  transition: var(--transition-fast);
}

.project-inquire-btn:hover {
  background: rgba(0, 85, 255, 0.16);
  border-color: var(--border-highlight);
  transform: translateX(2px);
}

.btn-submit[disabled] {
  opacity: 0.65;
  cursor: wait;
  pointer-events: none;
}

/* ==========================================================================
   v7.2 Mobile Adaptation & Touch Ergonomics Polish (M-01 to M-07)
   ========================================================================== */
.pue-range-input {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  margin: 14px 0 16px;
}

.pue-range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand-gradient);
  border: 2px solid #ffffff;
  box-shadow: 0 2px 10px rgba(0, 85, 255, 0.45);
  cursor: pointer;
}

.pue-range-input::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand-gradient);
  border: 2px solid #ffffff;
  box-shadow: 0 2px 10px rgba(0, 85, 255, 0.45);
  cursor: pointer;
}

.privacy-consent-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

@media (hover: none) {
  .zoom-hint {
    opacity: 0.92;
  }
}

@media (max-width: 768px) {
  .pue-presets {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .pue-preset-btn {
    min-height: 38px;
    text-align: center;
    justify-content: center;
  }

  .pue-slider-ticks span:nth-child(2) {
    order: 3;
    width: 100%;
    text-align: center;
    padding-top: 4px;
    border-top: 1px dashed var(--border-subtle);
  }

  .pue-calc-footer #calc-to-form-btn {
    width: 100%;
    min-height: 44px;
    justify-content: center;
  }

  .lightbox-modal {
    padding: calc(18px + env(safe-area-inset-top, 0px)) 14px calc(18px + env(safe-area-inset-bottom, 0px));
  }

  .lightbox-close {
    min-height: 36px;
    padding: 7px 14px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
}

@media (max-width: 540px) {
  .lang-toggle {
    height: 38px;
    padding: 0 11px;
  }

  .theme-toggle,
  .mobile-menu-btn {
    width: 38px;
    height: 38px;
  }

  .hud-hub-tags {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .hud-hub-tag {
    padding: 6px 8px;
  }

  .eco-orbit-diagram {
    max-width: 288px;
  }

  .eco-orbit-node.node-2 {
    left: 79.5%;
  }

  .eco-orbit-node.node-5 {
    left: 20.5%;
  }

  .eco-orbit-node.node-3 {
    left: 69.5%;
  }

  .eco-orbit-node.node-4 {
    left: 30.5%;
  }

  html[lang="en"] .eco-orbit-node {
    padding: 3px 7px;
    gap: 3px;
  }

  html[lang="en"] .orbit-node-txt {
    font-size: 0.625rem;
  }

  .pue-tariff-bar {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .pue-tariff-btn {
    width: 100%;
    min-height: 38px;
    text-align: center;
  }

  .project-card-foot .project-inquire-btn {
    width: 100%;
    min-height: 40px;
    justify-content: center;
  }

  .quick-tag-chip {
    min-height: 36px;
    padding: 6px 12px;
  }

  .privacy-modal {
    padding: 14px;
  }

  .privacy-modal-card {
    max-height: 88vh;
    max-height: 88dvh;
    border-radius: var(--radius-md);
  }

  .privacy-modal-head {
    padding: 16px 18px;
  }

  .privacy-modal-head h3 {
    font-size: var(--text-base);
    line-height: 1.35;
  }

  .privacy-modal-body {
    padding: 16px 18px;
  }

  .privacy-modal-foot {
    padding: 14px 18px;
  }

  .privacy-modal-foot .btn {
    width: 100%;
    min-height: 42px;
  }
}

@media (max-width: 370px) {
  .pue-presets {
    grid-template-columns: 1fr;
  }

  .eco-orbit-diagram {
    max-width: 256px;
  }
}

/* ==========================================================================
   v7.3 Flagship Tech Portal Enhancements (Cert Matrix, Spec Sheet, FAQ, Skip-Link & Print)
   ========================================================================== */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 9999;
  padding: 10px 18px;
  background: var(--brand-gradient);
  color: #ffffff;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 14px;
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* Authoritative Qualifications & Engineering Compliance Matrix (#cert-matrix) */
.cert-compliance-section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
}

.cert-compliance-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.cert-featured-card {
  display: grid;
  grid-template-columns: 0.95fr 1.15fr;
  gap: 24px;
  padding: 26px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-accent);
  align-items: center;
}

.cert-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22);
}

.cert-figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

.cert-info-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cert-verified-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-accent);
  background: rgba(0, 85, 255, 0.1);
  border: 1px solid var(--border-accent);
}

.cert-verified-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.75);
}

.cert-card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.cert-card-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
}

.cert-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.cert-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cert-meta-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.cert-meta-val {
  font-size: var(--text-xs);
  color: var(--text-primary);
  font-weight: 600;
}


.compliance-standards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.compliance-std-card {
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: var(--transition-base);
}

.compliance-std-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.std-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.std-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-accent);
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0, 85, 255, 0.1);
}

.std-status {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

.compliance-std-card h4 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  margin: 2px 0 0;
}

.compliance-std-card p {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Comprehensive Engineering Spec Sheet Table (#engineering-spec-sheet) */
.spec-sheet-card {
  margin-top: 32px;
  padding: 28px 30px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.spec-sheet-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.spec-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-xs);
  padding: 9px 16px;
}

.spec-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
}

.spec-sheet-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--text-sm);
  min-width: 720px;
}

.spec-sheet-table th {
  padding: 13px 16px;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-accent);
  background: rgba(0, 85, 255, 0.08);
  border-bottom: 1px solid var(--border-accent);
}

.spec-sheet-table td {
  padding: 13px 16px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.55;
  vertical-align: top;
}

.spec-sheet-table tbody tr:last-child td {
  border-bottom: none;
}

.spec-sheet-table tbody tr:hover td {
  background: rgba(0, 85, 255, 0.04);
}

.spec-col-cat {
  font-weight: 700;
  color: var(--text-primary) !important;
  white-space: nowrap;
}

.spec-col-metric {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-accent) !important;
}

/* B2B Technical & Commercial FAQ Accordion (#faq-block) */
.faq-section-card {
  margin-bottom: 36px;
  padding: 28px 30px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.faq-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.faq-head-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.faq-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-accent);
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(0, 85, 255, 0.08);
  border: 1px solid var(--border-accent);
}

.faq-toggle-all-btn {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: var(--transition-fast);
}

.faq-toggle-all-btn:hover {
  color: var(--text-accent);
  border-color: var(--border-accent);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  align-items: stretch;
}

.faq-item {
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: var(--transition-fast);
  box-sizing: border-box;
}

.faq-item[open] {
  border-color: var(--border-accent);
  box-shadow: 0 6px 20px rgba(0, 85, 255, 0.08);
  height: 100%;
}

.faq-item:not([open]) {
  align-self: start;
}

.faq-question {
  list-style: none;
  cursor: pointer;
  padding: 15px 18px;
  min-height: 70px;
  box-sizing: border-box;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  line-height: 1.45;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 85, 255, 0.1);
  color: var(--text-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease;
}

.faq-item[open] .faq-question::after {
  content: '−';
  background: var(--brand-blue);
  color: #ffffff;
}

.faq-answer {
  padding: 14px 18px 16px;
  min-height: 126px;
  box-sizing: border-box;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.72;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  align-items: flex-start;
}

html[lang="en"] .faq-answer {
  min-height: 138px;
}

@media (max-width: 1120px) {
  .cert-compliance-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .cert-featured-card {
    grid-template-columns: 1fr;
    padding: 20px;
  }

  .compliance-standards-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .faq-question,
  .faq-answer,
  html[lang="en"] .faq-answer {
    min-height: 0;
  }

  .spec-sheet-card,
  .faq-section-card {
    padding: 22px 18px;
  }

  .spec-copy-btn {
    width: 100%;
    justify-content: center;
    min-height: 42px;
  }
}

@media (max-width: 540px) {
  .cert-meta-grid {
    grid-template-columns: 1fr;
  }
}

/* Enterprise Procurement & Tender Dossier Print Stylesheet (@media print) */
@media print {
  * {
    background: transparent !important;
    color: #0f172a !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    background: #ffffff !important;
    font-size: 11pt;
  }

  .site-header,
  .scroll-progress-bar,
  .ambient-beam,
  .ambient-grid,
  .floating-dock,
  .lightbox-modal,
  .privacy-modal,
  .mobile-nav-backdrop,
  .zoom-hint,
  .hero-actions,
  .pue-presets,
  .pue-tariff-bar,
  #calc-to-form-btn,
  .spec-sheet-actions,
  .coop-form-card {
    display: none !important;
  }

  .hero {
    min-height: auto !important;
    padding: 24px 0 !important;
  }

  .hero-bg {
    display: none !important;
  }

  .cap-panel,
  .eng-panel {
    display: block !important;
    opacity: 1 !important;
    margin-bottom: 24px !important;
    page-break-inside: avoid;
  }

  .reveal-up {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ==========================================================================
   v7.5 Strategic Partner Ecosystem Matrix (.partner-eco-strip)
   ========================================================================== */
.partner-eco-strip {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--border-subtle);
}

.partner-eco-head {
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.partner-eco-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-accent);
  letter-spacing: 0.03em;
}

.partner-eco-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.partner-eco-card {
  padding: 15px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: var(--transition-fast);
}

.partner-eco-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.pe-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-accent);
}

.pe-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.pe-desc {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.55;
}

@media (max-width: 1120px) {
  .partner-eco-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 540px) {
  .partner-eco-grid {
    grid-template-columns: 1fr;
  }
}