/* style.css — Gold Spring Group Holdings Limited */

/* =============================================
   FONTS
   ============================================= */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=DM+Sans:wght@300;400;500;600;700&display=swap');

/* =============================================
   DESIGN TOKENS
   ============================================= */
:root {
  /* Font families */
  --font-display: 'Playfair Display', 'Noto Serif TC', Georgia, serif;
  --font-body: 'DM Sans', 'Noto Sans TC', system-ui, sans-serif;

  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px system) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Color Palette — Dark Gold/Navy Premium */
  --color-bg:             #0d0f14;
  --color-surface:        #131620;
  --color-surface-2:      #1a1e2c;
  --color-surface-offset: #111318;
  --color-border:         rgba(184, 134, 11, 0.15);
  --color-border-subtle:  rgba(255, 255, 255, 0.06);
  --color-divider:        rgba(255, 255, 255, 0.08);

  /* Gold Accent */
  --color-gold:           #B8860B;
  --color-gold-light:     #D4A843;
  --color-gold-lighter:   #E8CC7A;
  --color-gold-dark:      #8B6508;
  --color-gold-bg:        rgba(184, 134, 11, 0.08);
  --color-gold-bg-hover:  rgba(184, 134, 11, 0.12);

  /* Text */
  --color-text:           #E8E6E1;
  --color-text-muted:     #9B9A97;
  --color-text-faint:     #5C5B58;
  --color-text-inverse:   #0d0f14;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-golden: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-gold: 0 4px 20px rgba(184, 134, 11, 0.15);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* =============================================
   GLOBAL STYLES
   ============================================= */
body {
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

a {
  color: var(--color-gold-light);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
a:hover {
  color: var(--color-gold-lighter);
}

/* =============================================
   SKIP NAV
   ============================================= */
.skip-nav {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-gold);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}
.skip-nav:focus {
  top: var(--space-4);
}

/* =============================================
   HEADER / NAVIGATION
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(13, 15, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: transform 0.3s var(--ease-golden),
              box-shadow 0.3s var(--ease-golden),
              background 0.3s var(--ease-golden);
}
.site-header.scrolled {
  background: rgba(13, 15, 20, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
  border-bottom-color: var(--color-border);
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}
.logo svg {
  width: 40px;
  height: 40px;
}
.logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-text-en {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gold-light);
  letter-spacing: 0.05em;
}
.logo-text-zh {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
}

/* Desktop Nav */
.main-nav {
  display: none;
}
.nav-list {
  display: flex;
  gap: var(--space-1);
  list-style: none;
}
.nav-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
  white-space: nowrap;
  text-align: center;
  line-height: 1.3;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-gold-light);
  background: var(--color-gold-bg);
}
.nav-link-zh {
  display: block;
  font-size: 0.7rem;
  opacity: 0.7;
}

/* Mobile menu button */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive);
}
.menu-toggle:hover {
  background: var(--color-gold-bg);
}
.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile nav overlay */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 49;
  background: rgba(13, 15, 20, 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease-golden),
              visibility 0.3s var(--ease-golden);
}
.mobile-nav.open {
  opacity: 1;
  visibility: visible;
}
.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  text-align: center;
  transition: color var(--transition-interactive);
}
.mobile-nav-link:hover {
  color: var(--color-gold-light);
}
.mobile-nav-zh {
  font-size: var(--text-sm);
  opacity: 0.6;
}

@media (min-width: 900px) {
  .main-nav { display: block; }
  .menu-toggle { display: none; }
}

/* =============================================
   SECTION BASE
   ============================================= */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  padding-inline: var(--space-6);
}
.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}
.section-header {
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}
.section-title-zh {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-2);
}
.section-title-en {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}
.section-divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
  margin-top: var(--space-4);
  border: none;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13, 15, 20, 0.6) 0%,
    rgba(13, 15, 20, 0.75) 40%,
    rgba(13, 15, 20, 0.92) 100%
  );
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--content-default);
  padding: var(--space-8) var(--space-6);
  text-align: center;
}
.hero-title-zh {
  font-family: var(--font-body);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: 0.08em;
}
.hero-title-en {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-gold-light);
  margin-bottom: var(--space-8);
  font-style: italic;
}
.hero-desc {
  max-width: 680px;
  margin: 0 auto var(--space-10);
}
.hero-desc-zh {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}
.hero-desc-en {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
  box-shadow: var(--shadow-gold);
}
.hero-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 30px rgba(184, 134, 11, 0.3);
  color: #fff;
}
.hero-cta:active {
  transform: translateY(0);
}
.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  animation: float 2.5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

/* =============================================
   ABOUT
   ============================================= */
.about-intro {
  display: grid;
  gap: var(--space-6);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-20));
}
.about-text-zh {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.8;
}
.about-text-en {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Differentiator cards */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-20));
}
.diff-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.diff-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-gold);
}
.diff-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  color: var(--color-gold);
}
.diff-title-zh {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-1);
}
.diff-title-en {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  letter-spacing: 0.03em;
}
.diff-desc-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.7;
}
.diff-desc-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Target clients */
.target-clients {
  padding: var(--space-8);
  background: var(--color-surface);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}
.target-title-zh {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-1);
}
.target-title-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.target-text-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}
.target-text-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =============================================
   SERVICES
   ============================================= */
.services-section {
  background: var(--color-surface-offset);
}
.services-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-6);
}
.service-card {
  flex: 1 1 280px;
  max-width: 380px;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
  display: flex;
  flex-direction: column;
}
@media (min-width: 900px) {
  .service-card {
    flex: 0 1 calc(33.333% - var(--space-6));
    max-width: none;
  }
}
.service-card:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}
.service-icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-5);
  color: var(--color-gold);
}
.service-title-zh {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-1);
}
.service-title-en {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  letter-spacing: 0.03em;
}
.service-desc-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-2);
}
.service-desc-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}

/* =============================================
   LEADERSHIP
   ============================================= */
.leadership-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  max-width: var(--content-default);
  margin: 0 auto;
}
.leader-portrait {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}
.leader-portrait img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}
.leader-info {
  display: flex;
  flex-direction: column;
}
.leader-name-zh {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.leader-name-en {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-gold-light);
  margin-bottom: var(--space-2);
  font-style: italic;
}
.leader-role-zh {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}
.leader-role-en {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.leader-divider {
  width: 40px;
  height: 2px;
  background: var(--color-gold);
  margin-bottom: var(--space-6);
  border: none;
}
.leader-bio-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}
.leader-bio-zh p {
  margin-bottom: var(--space-4);
}
.leader-bio-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.leader-bio-en p {
  margin-bottom: var(--space-3);
}

/* =============================================
   CAREERS
   ============================================= */
.careers-section {
  background: var(--color-surface-offset);
}
.careers-content {
  max-width: var(--content-default);
  margin: 0 auto;
  text-align: center;
}
.careers-text-zh {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}
.careers-text-en {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}
.careers-email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-gold-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-gold-light);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-interactive),
              border-color var(--transition-interactive);
}
.careers-email:hover {
  background: var(--color-gold-bg-hover);
  border-color: var(--color-gold);
  color: var(--color-gold-lighter);
}

/* =============================================
   CONTACT
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}
@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}
.contact-icon {
  width: 20px;
  height: 20px;
  color: var(--color-gold);
  flex-shrink: 0;
  margin-top: 2px;
}
.contact-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}
.contact-value {
  font-size: var(--text-sm);
  color: var(--color-text);
}
.contact-value a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.contact-value a:hover {
  color: var(--color-gold-light);
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}
.form-input,
.form-textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-faint);
}
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.15);
}
.form-textarea {
  resize: vertical;
  min-height: 140px;
}
.form-submit {
  align-self: flex-start;
  padding: var(--space-3) var(--space-8);
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
  box-shadow: var(--shadow-gold);
}
.form-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 30px rgba(184, 134, 11, 0.3);
}
.form-submit:active {
  transform: translateY(0);
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  padding: var(--space-12) var(--space-6) var(--space-8);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-subtle);
}
.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  text-align: center;
}
.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.footer-logo svg {
  width: 32px;
  height: 32px;
}
.footer-company {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-gold-light);
  letter-spacing: 0.03em;
  text-align: center;
  line-height: 1.6;
}
.footer-details {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}
.footer-detail {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}
.footer-detail a {
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.footer-detail a:hover {
  color: var(--color-gold-light);
}
.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-attribution a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-attribution a:hover {
  color: var(--color-text-muted);
}

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.fade-in {
  opacity: 1;
}
@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}
@keyframes reveal-fade {
  to { opacity: 1; }
}

/* JS fallback for browsers without scroll-timeline */
.js-fade {
  opacity: 0;
  transition: opacity 0.6s var(--ease-golden);
}
.js-fade.visible {
  opacity: 1;
}

/* Stagger children */
.stagger > * {
  opacity: 0;
  transition: opacity 0.5s var(--ease-golden);
}
.stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger.visible > *:nth-child(2) { transition-delay: 60ms; }
.stagger.visible > *:nth-child(3) { transition-delay: 120ms; }
.stagger.visible > *:nth-child(4) { transition-delay: 180ms; }
.stagger.visible > *:nth-child(5) { transition-delay: 240ms; }
.stagger.visible > *:nth-child(6) { transition-delay: 300ms; }
.stagger.visible > * {
  opacity: 1;
}
/* Before visible, reset */
.stagger:not(.visible) > * {
  opacity: 0;
}

/* =============================================
   TESTIMONIALS
   ============================================= */
.testimonials-section {
  background: var(--color-surface-offset);
}
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.testimonial-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.testimonial-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-gold);
}
.testimonial-quote-icon {
  width: 32px;
  height: 32px;
  color: var(--color-gold);
  opacity: 0.3;
  flex-shrink: 0;
}
.testimonial-text {
  flex: 1;
}
.testimonial-text-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--space-3);
}
.testimonial-text-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.7;
  font-style: italic;
}
.testimonial-author {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
}
.testimonial-author-zh {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-1);
}
.testimonial-author-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* =============================================
   COMPLIANCE & REPORTING
   ============================================= */
.compliance-section {
  background: var(--color-surface);
}
.compliance-intro {
  display: grid;
  gap: var(--space-6);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-20));
}
.compliance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}
.compliance-card {
  padding: var(--space-8);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.compliance-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-gold);
}
.compliance-card-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gold);
  opacity: 0.2;
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  line-height: 1;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .hero-title-zh {
    font-size: clamp(1.5rem, 1rem + 3vw, 2.5rem);
  }
  .hero-title-en {
    font-size: clamp(1.1rem, 0.8rem + 1.5vw, 1.5rem);
  }
  .section-title-zh {
    font-size: var(--text-lg);
  }
  .section-title-en {
    font-size: var(--text-base);
  }
  .leader-portrait {
    max-width: 240px;
  }
}

@media (max-width: 600px) {
  .services-grid {
    flex-direction: column;
  }
  .service-card {
    flex: none;
    width: 100%;
    max-width: none;
  }
}

@media (max-width: 600px) {
  .diff-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title-zh {
    font-size: clamp(1.3rem, 0.8rem + 3vw, 2rem);
    letter-spacing: 0.04em;
  }
  .hero-title-en {
    font-size: clamp(0.95rem, 0.7rem + 1.5vw, 1.3rem);
  }
  .hero-desc-zh {
    font-size: var(--text-sm);
  }
  .hero-desc-en {
    font-size: var(--text-xs);
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: var(--space-3) var(--space-4);
  }
  .logo-text-en {
    font-size: 0.8rem;
  }
  .section {
    padding-inline: var(--space-4);
  }
}

/* =============================================
   PAGE HERO (Sub-pages)
   ============================================= */
.page-hero {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13, 15, 20, 0.7) 0%,
    rgba(13, 15, 20, 0.85) 50%,
    rgba(13, 15, 20, 0.95) 100%
  );
  z-index: 1;
}
.page-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-16) var(--space-6);
}
.page-hero-title-zh {
  font-family: var(--font-body);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: 0.08em;
}
.page-hero-title-en {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-gold-light);
  font-style: italic;
}

/* =============================================
   ARTICLE INTRO
   ============================================= */
.article-intro {
  display: grid;
  gap: var(--space-6);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-20));
  max-width: var(--content-default);
}

/* =============================================
   ADVANTAGES GRID (Insights page)
   ============================================= */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}
.advantage-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
  position: relative;
}
.advantage-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-gold);
}
.advantage-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gold);
  opacity: 0.25;
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  line-height: 1;
}

/* =============================================
   CASE STUDIES (Insights page)
   ============================================= */
.case-studies-section {
  background: var(--color-surface-offset);
}
.case-studies-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
  font-style: italic;
}
.case-studies-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media (min-width: 768px) {
  .case-studies-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.case-study-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.case-study-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-gold);
}
.case-study-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-5);
  color: var(--color-gold);
}
.case-study-icon svg {
  width: 100%;
  height: 100%;
}
.case-study-title-zh {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-1);
}
.case-study-title-en {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  letter-spacing: 0.03em;
}
.case-study-text-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}
.case-study-text-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
  background: var(--color-surface);
}
.cta-block {
  padding: var(--space-12) var(--space-6);
}
.cta-title-zh {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-2);
}
.cta-title-en {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  font-style: italic;
}

/* =============================================
   TIMELINE (Process page)
   ============================================= */
.timeline {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  padding-left: var(--space-12);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--color-gold) 0%,
    var(--color-gold-dark) 100%
  );
  opacity: 0.3;
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-10);
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--space-12) + 4px);
  top: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-full);
  z-index: 1;
}
.timeline-number {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-gold-light);
}
.timeline-content {
  padding: var(--space-6) var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.timeline-content:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-gold);
}
.timeline-title-zh {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: var(--space-1);
}
.timeline-title-en {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  letter-spacing: 0.03em;
}
.timeline-desc-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--space-2);
}
.timeline-desc-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Timeline responsive */
@media (max-width: 480px) {
  .timeline {
    padding-left: var(--space-10);
  }
  .timeline::before {
    left: 19px;
  }
  .timeline-marker {
    left: calc(-1 * var(--space-10));
    width: 36px;
    height: 36px;
  }
  .timeline-content {
    padding: var(--space-4) var(--space-5);
  }
}

/* Advantages grid responsive */
@media (max-width: 600px) {
  .advantages-grid {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   STATS BAR
   ============================================= */
.stats-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
  padding-block: var(--space-12);
  padding-inline: var(--space-6);
}
.stats-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-6);
  text-align: center;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}
.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stat-label-zh {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}
.stat-label-en {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
@media (max-width: 600px) {
  .stats-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

/* =============================================
   TRUST SEAL BAR
   ============================================= */
.trust-seal-bar {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-6);
  padding-inline: var(--space-6);
}
.trust-seal-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-8);
}
.trust-seal-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.trust-seal-icon {
  width: 20px;
  height: 20px;
  stroke: var(--color-gold);
  flex-shrink: 0;
}
.trust-seal-text {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
}
@media (max-width: 600px) {
  .trust-seal-inner {
    gap: var(--space-4);
    justify-content: flex-start;
  }
}

/* =============================================
   CREDENTIAL BADGES
   ============================================= */
.credential-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}
.credential-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-gold-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-gold-light);
  font-weight: 600;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* =============================================
   LEADER APPOINTMENTS LIST
   ============================================= */
.leader-appointments {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: grid;
  gap: var(--space-2);
}
.leader-appointments li {
  position: relative;
  padding-left: var(--space-6);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.leader-appointments li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--color-gold);
  border-radius: 50%;
  opacity: 0.5;
}

/* =============================================
   AFFILIATIONS SECTION
   ============================================= */
.affiliations-section {
  background: var(--color-surface);
}
.affiliations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.affiliation-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.affiliation-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}
.affiliation-icon-wrap {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gold-bg);
  border-radius: var(--radius-full);
}
.affiliation-icon {
  width: 28px;
  height: 28px;
  stroke: var(--color-gold-light);
}
.affiliation-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--color-gold-light);
  margin-bottom: var(--space-3);
  font-weight: 600;
}
.affiliation-desc-zh {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.affiliation-desc-en {
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-text-muted);
}
@media (max-width: 900px) {
  .affiliations-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .affiliations-grid {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   COOPERATION SECTION
   ============================================= */
.cooperation-section {
  background: var(--color-bg);
}
.cooperation-intro-zh,
.cooperation-intro-en {
  text-align: center;
  max-width: var(--content-default);
  margin-inline: auto;
}
.cooperation-intro-zh {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.cooperation-intro-en {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
}
.cooperation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.cooperation-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-interactive);
}
.cooperation-card:hover {
  border-color: var(--color-border);
}
.cooperation-card-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gold-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}
.cooperation-logos {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.coop-logo-text {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text);
  white-space: nowrap;
  line-height: 1.4;
}
@media (max-width: 900px) {
  .cooperation-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .cooperation-grid {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   AWARDS SECTION
   ============================================= */
.awards-section {
  background: var(--color-surface);
}
.awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.award-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: border-color var(--transition-interactive),
              transform var(--transition-interactive);
}
.award-card:hover {
  border-color: var(--color-gold);
  transform: translateY(-2px);
}
.award-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
}
.award-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--color-gold-light);
}
.award-title-zh {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.award-title-en {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-gold-light);
  margin-bottom: var(--space-4);
  font-weight: 600;
}
.award-desc-zh {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.award-desc-en {
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-text-muted);
}
@media (max-width: 900px) {
  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .awards-grid {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   WHATSAPP FLOATING BUTTON
   ============================================= */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 40;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.whatsapp-float:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
  color: #fff;
}
@media (max-width: 480px) {
  .whatsapp-float {
    width: 48px;
    height: 48px;
    bottom: var(--space-4);
    right: var(--space-4);
  }
  .whatsapp-float svg {
    width: 24px;
    height: 24px;
  }
}

/* =============================================
   FOOTER REGULATORY
   ============================================= */
.footer-regulatory {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  max-width: var(--content-default);
  margin-inline: auto;
}
.footer-regulatory-text {
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
  text-align: center;
}

/* =============================================
   FOOTER LINKS
   ============================================= */
.footer-links {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}
.footer-links a {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-links a:hover {
  color: var(--color-gold-light);
}
.footer-sep {
  margin-inline: var(--space-2);
  opacity: 0.3;
}