/* ==========================================================================
   IT Zhang (IT张工) - English Corporate Website Stylesheet V1.1
   Brand Identity: 100% Unified with Chinese Site (home-redesign.css & style.css)
   Layout Philosophy: Western B2B Enterprise Technology (Clean / Modern / Premium / Minimal)
   ========================================================================== */

:root {
  /* ==========================================================================
     1. Brand Colors - Unified 1:1 with Chinese Site (itzhang.cn)
     ========================================================================== */
  --color-gold: #ffd21f;
  --color-gold-hover: #ffe053;
  --color-gold-dark: #d97706;
  --color-gold-glow: rgba(255, 210, 31, 0.28);
  --color-gold-subtle: rgba(255, 210, 31, 0.08);
  --color-gold-border: rgba(255, 210, 31, 0.35);

  /* Obsidian & Charcoal Dark Foundations */
  --color-dark-bg: #0b0e0c;
  --color-dark-surface: #0f1411;
  --color-dark-card: #131715;
  --color-dark-card-hover: #171d19;
  --color-dark-border: rgba(255, 255, 255, 0.08);
  --color-dark-border-hover: rgba(255, 210, 31, 0.4);

  /* Alternating Section Backgrounds */
  --color-section-dark: #0b0e0c;
  --color-section-alt: #0f1411;
  --color-section-deep: #131715;

  /* Typography Colors */
  --color-text-white: #ffffff;
  --color-text-primary: rgba(255, 255, 255, 0.92);
  --color-text-secondary: rgba(255, 255, 255, 0.72);
  --color-text-muted: #64748b;
  --color-text-dark: #0f172a;

  /* Functional Accents */
  --color-wechat-green: #07c160;
  --color-accent-blue: #38bdf8;
  --color-danger: #ef4444;

  /* Spacing & Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --container-max-width: 1280px;
  --header-height: 68px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* Box Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.55);
  --shadow-gold: 0 4px 14px rgba(255, 210, 31, 0.35);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}


/* Anchor scroll offset */
#services,
#solutions,
#why-us,
#process,
#faq,
#contact-banner,
#footer {
  scroll-margin-top: 80px;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-dark-bg);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--color-dark-bg);
  color: var(--color-text-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease, transform 0.15s ease;
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   2. Header & Navigation (Unified with Chinese Site)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(11, 14, 12, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-dark-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
}

.brand-text-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-name {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 4px;
  line-height: 1.1;
}

.brand-name .highlight,
.brand-name span {
  color: var(--color-gold);
}

.brand-slogan {
  font-size: 0.74rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.2px;
  white-space: nowrap;
  line-height: 1.2;
  margin-top: 2px;
}

/* Desktop Navigation Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 8px 0;
  position: relative;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--color-gold);
}

.nav-link.active {
  color: #ffffff;
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-gold);
  border-radius: 2px;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Language Switcher Pill */
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  flex-shrink: 0;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1;
  color: var(--color-text-muted);
}

.lang-switch a,
.lang-switch span {
  display: inline-block;
  white-space: nowrap;
  line-height: 1;
}

.lang-switch a {
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.lang-switch a:hover {
  color: #ffffff;
}

.lang-switch .active {
  color: var(--color-gold);
  font-weight: 700;
}

.lang-switch .sep {
  color: rgba(255, 255, 255, 0.25);
  user-select: none;
}

/* Header Consultation CTA (Unified Gold Button) */
.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background-color: var(--color-gold);
  color: #0b0e0c;
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: none;
  box-shadow: 0 2px 10px rgba(255, 210, 31, 0.25);
  transition: transform 0.15s ease, background-color 0.15s ease;
  cursor: pointer;
}

.btn-header-cta:hover {
  background-color: var(--color-gold-hover);
  transform: translateY(-1px);
}

/* Mobile Toggle */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}

.mobile-menu-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   3. Buttons & Interactive Controls (Brand Aligned)
   ========================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  background-color: var(--color-gold);
  color: #0b0e0c;
  font-size: 0.98rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gold);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary:hover {
  background-color: var(--color-gold-hover);
  border-color: var(--color-gold-hover);
  box-shadow: 0 6px 20px rgba(255, 210, 31, 0.38);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: rgba(14, 18, 15, 0.7);
  color: var(--color-gold);
  font-size: 0.98rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 210, 31, 0.5);
  backdrop-filter: blur(8px);
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: rgba(255, 210, 31, 0.16);
  border-color: var(--color-gold);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ==========================================================================
   4. Hero Section (European / US B2B Asymmetric 2-Column Layout)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 68px 0 84px;
  overflow: hidden;
  background-color: var(--color-dark-bg);
  border-bottom: 1px solid var(--color-dark-border);
}

/* Warm Atmospheric Glow */
.hero-atmosphere {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 45% at 50% 0%, rgba(255, 210, 31, 0.06) 0%, transparent 70%),
    linear-gradient(180deg, rgba(7, 11, 8, 0.4) 0%, transparent 60%);
  z-index: 1;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

/* Eyebrow Pill */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 210, 31, 0.08);
  border: 1px solid rgba(255, 210, 31, 0.35);
  border-radius: var(--radius-full);
  color: var(--color-gold);
  font-size: 0.84rem;
  font-weight: 650;
  letter-spacing: 0.3px;
  margin-bottom: 22px;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-gold);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(255, 210, 31, 0.7);
}

.hero-title {
  font-size: clamp(2.35rem, 4vw, 3.35rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: #ffffff;
  margin-bottom: 22px;
}

.hero-br {
  display: inline;
}

@media (max-width: 900px) {
  .hero-br {
    display: none;
  }
}

.hero-title .highlight-gold,
.hero-title .gradient-text {
  color: var(--color-gold);
  background: none;
  -webkit-text-fill-color: initial;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.18rem);
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

/* Western B2B Trust Bar */
.hero-trust-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 18px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  width: 100%;
  max-width: 580px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
  letter-spacing: 0.1px;
}

.trust-item svg {
  color: var(--color-gold);
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.trust-item svg {
  color: var(--color-gold);
  flex-shrink: 0;
}

/* Right Column: Visual Showcase Mockup */
.hero-visual-card {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-frame {
  position: relative;
  width: 100%;
  max-width: 500px;
  border-radius: 20px;
  background: var(--color-dark-card);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65);
  overflow: visible;
}

.visual-img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Floating Glass Badges */
.visual-card-glass {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(14, 18, 15, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 210, 31, 0.35);
  padding: 10px 16px;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 3;
}

.floating-pill-1 {
  top: -16px;
  right: -14px;
}

.floating-pill-2 {
  bottom: -18px;
  left: -14px;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-wechat-green);
  box-shadow: 0 0 8px rgba(7, 193, 96, 0.7);
  flex-shrink: 0;
}

.status-indicator.yellow {
  background-color: var(--color-gold);
  box-shadow: 0 0 8px rgba(255, 210, 31, 0.8);
}

.pill-title {
  font-size: 0.86rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.pill-meta {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.2;
}

/* Fallback for Centered Content Structure if used */
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.hero-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.hero-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   5. Page Hero (For Subpages)
   ========================================================================== */
.page-hero {
  position: relative;
  padding: 54px 0 60px;
  background-color: var(--color-dark-bg);
  border-bottom: 1px solid var(--color-dark-border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb a:hover {
  color: var(--color-gold);
}

.breadcrumb .sep {
  color: rgba(255, 255, 255, 0.2);
}

.page-hero-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 14px;
}

.page-hero-lead {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 820px;
  margin-bottom: 22px;
}

.scope-notice-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(255, 210, 31, 0.08);
  border: 1px solid rgba(255, 210, 31, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-gold);
  font-size: 0.9rem;
  font-weight: 500;
}

.scope-notice-box svg {
  flex-shrink: 0;
  color: var(--color-gold);
}

/* ==========================================================================
   6. Sections & Visual Rhythm
   ========================================================================== */
.section {
  padding: 80px 0;
  position: relative;
  background-color: var(--color-section-dark);
}

.section-darker {
  background-color: var(--color-section-alt);
  border-top: 1px solid var(--color-dark-border);
  border-bottom: 1px solid var(--color-dark-border);
}

.section-deep {
  background-color: var(--color-section-deep);
  border-top: 1px solid var(--color-dark-border);
  border-bottom: 1px solid var(--color-dark-border);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-kicker {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.8rem, 3.2vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-description {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   7. Grid Systems & Service Cards (European / US B2B Clean Style)
   ========================================================================== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* Service Card */
.service-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  background: var(--color-dark-card-hover);
  border-color: var(--color-dark-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* Featured Core Pillar Badge */
.service-card.featured {
  border-color: rgba(255, 210, 31, 0.35);
  background: linear-gradient(180deg, rgba(255, 210, 31, 0.04) 0%, var(--color-dark-card) 60%);
}

.service-pillar-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gold);
  background: rgba(255, 210, 31, 0.1);
  border: 1px solid rgba(255, 210, 31, 0.28);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.service-icon-box {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: #fff9ed;
  border: 1px solid rgba(255, 210, 31, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold-dark);
  margin-bottom: 20px;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.service-card:hover .service-icon-box {
  transform: translateY(-2px);
  background: #fef3c7;
  border-color: var(--color-gold);
}

.service-card-title {
  font-size: 1.22rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  line-height: 1.35;
}

.service-card-text {
  font-size: 0.94rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.service-learn-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-top: auto;
  transition: gap 0.2s ease, color 0.15s ease;
}

.service-learn-more:hover {
  gap: 9px;
  color: var(--color-gold-hover);
}

/* Feature Pillar Card (Why Choose Us) */
.pillar-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.pillar-card:hover {
  border-color: var(--color-dark-border-hover);
  transform: translateY(-3px);
}

.pillar-number {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-gold);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pillar-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.pillar-desc {
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Pain Point / Scenario Card */
.scenario-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.scenario-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background-color: var(--color-dark-card-hover);
}

.scenario-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.scenario-text {
  font-size: 0.96rem;
  color: var(--color-text-primary);
  line-height: 1.55;
}

/* Process Timeline (How We Work) */
.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.process-step {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.process-step:hover {
  border-color: var(--color-dark-border-hover);
  transform: translateY(-2px);
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(255, 210, 31, 0.12);
  border: 1px solid rgba(255, 210, 31, 0.4);
  color: var(--color-gold);
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.step-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
  line-height: 1.35;
}

.step-desc {
  font-size: 0.84rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* FAQ Grid */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  max-width: 1080px;
  margin: 0 auto;
}

.faq-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color 0.2s ease;
}

.faq-card:hover {
  border-color: rgba(255, 210, 31, 0.3);
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.4;
}

.faq-q-badge {
  color: var(--color-gold);
  font-weight: 800;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 0.94rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-left: 22px;
}

/* ==========================================================================
   8. Bottom Conversion Banner (Unified Dark Skyline Banner)
   ========================================================================== */
.cta-banner-section {
  padding: 76px 0;
  background: var(--color-dark-bg);
  border-top: 1px solid var(--color-dark-border);
  border-bottom: 1px solid var(--color-dark-border);
  text-align: center;
  position: relative;
}

.cta-banner-card {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 36px;
  background: var(--color-dark-card);
  border: 1px solid rgba(255, 210, 31, 0.28);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.55);
}

.cta-banner-title {
  font-size: clamp(1.8rem, 3.2vw, 2.35rem);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.cta-banner-text {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto 30px;
  line-height: 1.6;
}

.cta-banner-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   9. Contact Page Layout & Form (Clean Western B2B Style)
   ========================================================================== */
.contact-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 40px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card-box {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease;
}

.contact-card-box:hover {
  border-color: var(--color-dark-border-hover);
}

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

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 210, 31, 0.1);
  border: 1px solid rgba(255, 210, 31, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold);
}

.contact-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.contact-detail-line {
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 6px;
}

.contact-detail-hint {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* WeChat QR Card */
.wechat-qr-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--color-dark-card);
  border: 1px solid rgba(255, 210, 31, 0.3);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.wechat-qr-img {
  width: 110px;
  height: auto;
  aspect-ratio: 803 / 1024;
  border-radius: 10px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  object-fit: contain;
  flex-shrink: 0;
}

.wechat-qr-desc h4 {
  font-size: 1.08rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.wechat-qr-desc p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Contact Form */
.contact-form-panel {
  background: var(--color-dark-card);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-label .required {
  color: var(--color-gold);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: #070a08;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-size: 0.95rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(255, 210, 31, 0.2);
}

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

.form-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  line-height: 1.45;
}

.form-submit-btn {
  width: 100%;
  padding: 13px;
  background-color: var(--color-gold);
  color: #0b0e0c;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(255, 210, 31, 0.3);
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.form-submit-btn:hover {
  background-color: var(--color-gold-hover);
  transform: translateY(-1px);
}

.form-feedback-msg {
  margin-top: 14px;
  padding: 12px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  display: none;
}

/* ==========================================================================
   10. Footer (Unified with Chinese Site)
   ========================================================================== */
.site-footer {
  background-color: #070b08;
  border-top: 1px solid var(--color-dark-border);
  padding: 60px 0 32px;
  color: var(--color-text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer-brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-brand-title span {
  color: var(--color-gold);
}

.footer-slogan {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-gold);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-link {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.footer-nav-link:hover {
  color: var(--color-gold);
}

.footer-contact-item {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer-legal-links {
  display: flex;
  gap: 18px;
}

.footer-legal-links a:hover {
  color: var(--color-gold);
}

/* ==========================================================================
   11. Floating Customer Service Action (Black & Gold Pill)
   ========================================================================== */
.floating-wechat-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  height: 48px;
  padding: 0 18px 0 8px;
  border-radius: var(--radius-full);
  background-color: #131715;
  border: 1px solid rgba(255, 210, 31, 0.55);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.65), 0 2px 8px rgba(255, 210, 31, 0.25);
  z-index: 990;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  white-space: nowrap;
}

.floating-wechat-btn:hover {
  background-color: #1a221d;
  border-color: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.75), 0 4px 14px rgba(255, 210, 31, 0.38);
}

.floating-wechat-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-gold);
  color: #0b0e0c;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.floating-wechat-text {
  display: flex;
  flex-direction: column;
  text-align: left;
  line-height: 1.15;
}

.floating-wechat-title {
  font-size: 0.88rem;
  font-weight: 750;
  color: #ffffff;
  letter-spacing: 0.2px;
}

.floating-wechat-subtitle {
  font-size: 0.72rem;
  color: var(--color-gold);
  font-weight: 600;
  margin-top: 2px;
}

@media (max-width: 768px) {
  .floating-wechat-btn {
    bottom: 20px;
    right: 16px;
    height: 42px;
    padding: 0 14px 0 6px;
    gap: 8px;
  }
  .floating-wechat-icon {
    width: 30px;
    height: 30px;
  }
  .floating-wechat-title {
    font-size: 0.82rem;
  }
  .floating-wechat-subtitle {
    display: none;
  }
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--color-dark-card);
  border: 1px solid rgba(255, 210, 31, 0.35);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px;
  transition: color 0.15s ease;
}

.modal-close-btn:hover {
  color: #ffffff;
}

.modal-qr-img {
  width: 180px;
  height: auto;
  aspect-ratio: 803 / 1024;
  margin: 0 auto 14px;
  border-radius: 12px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  display: block;
  object-fit: contain;
}

/* ==========================================================================
   12. Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-copy {
    align-items: center;
    text-align: center;
  }

  .hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.18rem);
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
  max-width: 620px;
}

  .hero-actions {
    justify-content: center;
  }

  .hero-trust-bar {
    margin-left: auto;
    margin-right: auto;
  }

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

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

  .contact-layout-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .site-header {
    height: 60px;
  }

  .btn-header-cta {
    display: none;
  }

  .brand-slogan {
    display: none;
  }

  .brand-logo-img {
    width: 36px;
    height: 36px;
  }

  .brand-name {
    font-size: 1.12rem;
    white-space: nowrap;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .lang-switch {
    padding: 4px 10px;
    font-size: 0.8rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .mobile-menu-btn {
    display: block;
  }

  .nav-links {
    display: none;
  }

  /* Mobile Slide Down Menu */
  .nav-links.active,
  .nav-links[data-open="true"] {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    width: 100vw;
    background: #0c100d;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 16px 20px 24px;
    border-bottom: 1px solid rgba(255, 210, 31, 0.25);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.85);
    gap: 10px;
    z-index: 999;
  }

  .nav-links.active .nav-link,
  .nav-links[data-open="true"] .nav-link {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-links.active .nav-link.active,
  .nav-links[data-open="true"] .nav-link.active {
    background: rgba(255, 210, 31, 0.12);
    border-color: rgba(255, 210, 31, 0.35);
    color: var(--color-gold);
  }

  .grid-3,
  .grid-2,
  .grid-4,
  .process-grid,
  .faq-grid,
  .footer-grid,
  .contact-layout-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .contact-layout-grid {
    gap: 20px;
    margin-top: 24px;
  }

  .contact-info-panel,
  .contact-form-panel {
    min-width: 0;
    width: 100%;
  }

  .contact-card-box {
    padding: 20px 16px;
    min-width: 0;
  }

  .contact-detail-line {
    word-break: break-word;
  }

  .hero-section {
    padding: 36px 0 76px;
  }

  .hero-trust-bar {
    grid-template-columns: 1fr;
    text-align: left;
    gap: 8px;
    padding-top: 18px;
    max-width: calc(100% - 135px);
    margin-bottom: 20px;
  }
  .hero-trust-bar .trust-item {
    font-size: 0.88rem;
  }

  .visual-card-glass {
    position: static;
    margin-top: 12px;
  }

  .floating-pill-1,
  .floating-pill-2 {
    position: static;
  }

  .visual-frame {
    padding: 8px;
  }

  .hero-actions,
  .cta-banner-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}


/* ==========================================================================
   Rich Visual Imagery & Partner Section Layout
   ========================================================================== */
.partner-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.partner-pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.partner-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--color-dark-card);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6);
}

.partner-visual-img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  display: block;
  filter: brightness(0.96) contrast(1.02);
}

.partner-visual-overlay {
  position: absolute;
  bottom: 18px;
  left: 18px;
  right: 18px;
}

.visual-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(14, 18, 15, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 210, 31, 0.4);
  padding: 12px 18px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.badge-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
}

.badge-desc {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
}

/* Service Card Media */
.service-card-media {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
  background: #070a08;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.service-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.service-card:hover .service-card:hover .service-card-img { transform: scale(1.04); }

/* Skyline Atmospheric Background for CTA */
.cta-banner-section {
  position: relative;
  background-image: 
    linear-gradient(180deg, rgba(7, 11, 8, 0.88) 0%, rgba(7, 11, 8, 0.96) 100%),
    url('../ref_assets/cta-skyline-bg-clean.webp');
  background-position: center bottom;
  background-repeat: no-repeat;
  background-size: cover;
}

/* Subpage Visual Feature Cards */
.subpage-visual-showcase {
  margin: 36px 0 20px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--color-dark-card);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.subpage-visual-img {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  display: block;
}

/* Responsive updates for partner grid */
@media (max-width: 1024px) {
  .partner-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

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

.partner-visual-card,
.about-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--color-dark-card);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6);
  aspect-ratio: 1 / 1;
  max-height: 480px;
}
.partner-visual-img,
.about-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: brightness(0.96) contrast(1.02);
}
.grid-2 .service-card-media { height: 220px; }
.grid-3 .service-card-media { height: 185px; }
.grid-4 .service-card-media { height: 150px; }