/* ============================================================
   商开有限公司 — 企业官网设计系统
   Design System v1.0 | B2B Corporate Website
   ============================================================ */

/* --- CSS Custom Properties / Design Tokens --- */
:root {
  /* === Color System === */
  /* Primary: Deep Navy — authority, trust, professionalism */
  --color-primary-950: #060d1a;
  --color-primary-900: #0a1628;
  --color-primary-800: #0f1f3d;
  --color-primary-700: #152952;
  --color-primary-600: #1c3468;
  --color-primary-500: #23407d;
  --color-primary-400: #3b5999;
  --color-primary-300: #5a78b5;
  --color-primary-200: #8ba3d1;
  --color-primary-100: #bccbe6;
  --color-primary-50: #e8edf5;

  /* Accent: Rich Gold — excellence, premium, value */
  --color-accent-900: #5c3d0e;
  --color-accent-800: #7a5218;
  --color-accent-700: #9e6b23;
  --color-accent-600: #b8862d;
  --color-accent-500: #c8a45c;
  --color-accent-400: #d4b878;
  --color-accent-300: #e0cc96;
  --color-accent-200: #ecdfb9;
  --color-accent-100: #f5eed9;
  --color-accent-50: #faf7ef;

  /* Neutral Grays */
  --color-gray-950: #0d0d0d;
  --color-gray-900: #1a1a1a;
  --color-gray-800: #2d2d2d;
  --color-gray-700: #404040;
  --color-gray-600: #595959;
  --color-gray-500: #737373;
  --color-gray-400: #8c8c8c;
  --color-gray-300: #a6a6a6;
  --color-gray-200: #cccccc;
  --color-gray-100: #e6e6e6;
  --color-gray-50: #f5f5f5;

  /* Semantic Colors */
  --color-white: #ffffff;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* === Typography === */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-display: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;

  /* Font Scale (Major Third: 1.25) */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.25rem;    /* 36px */
  --text-5xl: 3rem;       /* 48px */
  --text-6xl: 3.75rem;    /* 60px */

  --leading-tight: 1.15;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  --tracking-tighter: -0.03em;
  --tracking-tight: -0.015em;
  --tracking-normal: 0;
  --tracking-wide: 0.03em;
  --tracking-wider: 0.08em;

  /* === Spacing (4px base) === */
  --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;

  /* === Layout === */
  --container-max: 1280px;
  --container-narrow: 960px;
  --container-padding: var(--space-6);

  /* === Border Radius === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* === Shadows === */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.04);

  /* === Transitions === */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;

  /* === Z-Index === */
  --z-base: 1;
  --z-dropdown: 50;
  --z-sticky: 100;
  --z-overlay: 200;
  --z-modal: 300;
  --z-toast: 400;

  /* === Scroll === */
  --header-height: 76px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

button {
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  color: var(--color-primary-900);
  font-weight: 700;
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Section spacing */
.section {
  padding: var(--space-24) 0;
}

.section--sm {
  padding: var(--space-16) 0;
}

/* ============================================================
   IMAGE COMPONENTS — Real Photos
   ============================================================ */

/* Hero with background image */
.hero--with-image .hero__slide-bg {
  background-size: cover !important;
  background-position: center !important;
}

.hero--with-image .hero__slide-overlay {
  background: linear-gradient(
    180deg,
    rgba(6, 13, 26, 0.55) 0%,
    rgba(10, 22, 40, 0.7) 50%,
    rgba(6, 13, 26, 0.85) 100%
  );
}

/* About intro real image */
.about-intro__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
}

.about-intro__image--real {
  background: none !important;
  overflow: hidden;
}

/* Image gallery grid */
.image-gallery {
  display: grid;
  gap: var(--space-4);
}

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

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

.image-gallery__item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.image-gallery__item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-xl);
}

.image-gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.image-gallery__item--wide {
  grid-column: span 2;
  aspect-ratio: 16/9;
}

/* Section image (full-width within container) */
.section-image {
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin: var(--space-8) 0;
}

.section-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Photo cover card */
.photo-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.photo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.photo-card__image {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--color-gray-100);
}

.photo-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-slow) var(--ease-out-quart);
}

.photo-card:hover .photo-card__image img {
  transform: scale(1.06);
}

.photo-card__body {
  padding: var(--space-5) var(--space-6);
}

.photo-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-900);
  margin-bottom: var(--space-2);
}

.photo-card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

/* Biz card image header */
.biz-card__image-header {
  height: 180px;
  overflow: hidden;
  position: relative;
}

.biz-card__image-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.biz-card__image-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 22, 40, 0.1) 0%, rgba(10, 22, 40, 0.6) 100%);
}

.biz-card__image-header .biz-card__icon-wrap {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-4);
  z-index: 1;
}

/* Mining gallery specific */
.mining-gallery {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  grid-template-rows: 220px 220px;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.mining-gallery__item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.mining-gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-slow) var(--ease-out-quart);
}

.mining-gallery__item:hover img {
  transform: scale(1.08);
}

.mining-gallery__item:first-child {
  grid-row: span 2;
}

.mining-gallery__item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10, 22, 40, 0.4) 100%);
  pointer-events: none;
}

/* Partner logo row */
.partner-logo-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-8) 0;
  flex-wrap: wrap;
}

.partner-logo-row img {
  max-height: 60px;
  width: auto;
  opacity: 0.7;
  filter: grayscale(30%);
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.partner-logo-row img:hover {
  opacity: 1;
  filter: grayscale(0%);
}

/* Page hero with bg image */
.page-hero--image {
  position: relative;
  background-size: cover !important;
  background-position: center !important;
}

.page-hero--image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 22, 40, 0.85) 0%, rgba(10, 22, 40, 0.6) 100%);
}

.page-hero--image .container {
  position: relative;
  z-index: 1;
}

/* Fade-in image load */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--duration-normal);
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* Responsive image adjustments */
@media (max-width: 1023px) {
  .image-gallery--3col,
  .image-gallery--4col {
    grid-template-columns: repeat(2, 1fr);
  }

  .image-gallery__item--wide {
    grid-column: span 1;
  }

  .mining-gallery {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 200px 200px 200px;
  }

  .mining-gallery__item:first-child {
    grid-column: span 2;
    grid-row: span 1;
  }
}

@media (max-width: 767px) {
  .image-gallery--3col,
  .image-gallery--4col {
    grid-template-columns: 1fr;
  }

  .mining-gallery {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .mining-gallery__item {
    aspect-ratio: 16/9;
  }

  .mining-gallery__item:first-child {
    grid-column: span 1;
    grid-row: span 1;
  }

  .biz-card__image-header {
    height: 140px;
  }
}

.section--dark {
  background-color: var(--color-primary-900);
  color: var(--color-gray-100);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section--light {
  background-color: var(--color-gray-50);
}

.section--accent {
  background-color: var(--color-accent-50);
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.section-header--left {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.section-label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-600);
  margin-bottom: var(--space-3);
  position: relative;
}

.section-label::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--color-accent-500);
  margin: var(--space-2) auto 0;
}

.section-header--left .section-label::after {
  margin-left: 0;
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-4);
  color: var(--color-primary-900);
}

.section--dark .section-title {
  color: var(--color-white);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

.section--dark .section-subtitle {
  color: var(--color-gray-300);
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.header--scrolled {
  border-bottom-color: var(--color-gray-100);
  box-shadow: var(--shadow-sm);
}

.header--dark {
  background: rgba(10, 22, 40, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.header--dark .header__logo-text {
  color: var(--color-white);
}

.header--dark .nav__link {
  color: var(--color-gray-200);
}

.header--dark .nav__link:hover,
.header--dark .nav__link--active {
  color: var(--color-accent-400);
}

.header--dark .header__menu-btn span {
  background: var(--color-white);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  z-index: var(--z-overlay);
}

.header__logo-img {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  flex-shrink: 0;
}

.header__logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-900);
  letter-spacing: var(--tracking-tight);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-in-out);
  position: relative;
}

.nav__link:hover {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
}

.nav__link--active {
  color: var(--color-primary-600);
  font-weight: 600;
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-accent-500);
}

/* Mobile menu button */
.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: var(--z-overlay);
  cursor: pointer;
  background: none;
  border: none;
}

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-800);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out-expo);
  transform-origin: center;
}

.header__menu-btn--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__menu-btn--active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__menu-btn--active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out-quart);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  letter-spacing: var(--tracking-tight);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent-600), var(--color-accent-500));
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(200, 164, 92, 0.3);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--color-accent-700), var(--color-accent-600));
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(200, 164, 92, 0.4);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(200, 164, 92, 0.3);
}

.btn--outline {
  border: 1.5px solid currentColor;
  color: var(--color-primary-700);
}

.btn--outline:hover {
  background: var(--color-primary-50);
}

.btn--outline-light {
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  color: var(--color-white);
}

.btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

/* ============================================================
   HERO BANNER
   ============================================================ */

.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-primary-950);
}

.hero__slides {
  position: absolute;
  inset: 0;
}

.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--duration-slower) var(--ease-in-out);
  z-index: 1;
}

.hero__slide--active {
  opacity: 1;
  z-index: 2;
}

.hero__slide-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.35);
}

.hero__slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 22, 40, 0.7) 0%,
    rgba(10, 22, 40, 0.4) 50%,
    rgba(10, 22, 40, 0.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  padding-top: var(--header-height);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: rgba(200, 164, 92, 0.15);
  border: 1px solid rgba(200, 164, 92, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent-400);
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s both;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent-500);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: var(--tracking-tighter);
  line-height: 1.1;
  margin-bottom: var(--space-6);
  max-width: 720px;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.3s both;
}

.hero__title-accent {
  color: var(--color-accent-400);
}

.hero__desc {
  font-size: var(--text-lg);
  color: var(--color-gray-200);
  line-height: var(--leading-relaxed);
  max-width: 560px;
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.4s both;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.5s both;
}

.hero__indicators {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-3);
  z-index: 10;
}

.hero__indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-in-out);
}

.hero__indicator--active {
  background: var(--color-accent-500);
  transform: scale(1.3);
  box-shadow: 0 0 12px rgba(200, 164, 92, 0.5);
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  animation: bounce-down 2s ease-in-out infinite;
}

.hero__scroll-hint svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   STATS ROW
   ============================================================ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
}

.stat-item__number {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--color-accent-600);
  line-height: 1;
  margin-bottom: var(--space-2);
  font-family: var(--font-display);
}

.stat-item__label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  font-weight: 500;
}

/* ============================================================
   CARDS
   ============================================================ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card__body {
  padding: var(--space-6);
}

.card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: var(--text-2xl);
}

.card__icon--blue {
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

.card__icon--gold {
  background: var(--color-accent-50);
  color: var(--color-accent-600);
}

.card__icon--green {
  background: #ecfdf5;
  color: #059669;
}

.card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-primary-900);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

/* Feature / Advantage Cards Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

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

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

/* ============================================================
   BUSINESS CARDS (Large)
   ============================================================ */

.biz-card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  transition: all var(--duration-normal) var(--ease-out-quart);
  border: 1px solid var(--color-gray-100);
  cursor: pointer;
}

.biz-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.biz-card__header {
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
}

.biz-card__header::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background: linear-gradient(135deg, var(--color-primary-700), transparent);
}

.biz-card__icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: var(--text-3xl);
  position: relative;
  z-index: 1;
}

.biz-card__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
  position: relative;
  z-index: 1;
}

.biz-card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  position: relative;
  z-index: 1;
}

.biz-card__body {
  padding: var(--space-6) var(--space-8) var(--space-8);
}

.biz-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.biz-card__list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.biz-card__list-item::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent-500);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================================
   PAGE HERO (Inner Pages)
   ============================================================ */

.page-hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-16)) 0 var(--space-16);
  background: var(--color-primary-900);
  overflow: hidden;
  text-align: center;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(200, 164, 92, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 89, 153, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero__title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: var(--tracking-tighter);
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}

.page-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-300);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-hero__breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.page-hero__breadcrumb a {
  color: var(--color-accent-400);
  transition: color var(--duration-fast);
}

.page-hero__breadcrumb a:hover {
  color: var(--color-accent-300);
}

/* ============================================================
   ABOUT PAGE
   ============================================================ */

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-intro__image {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/3;
}

.about-intro__image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-500), var(--color-accent-700));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-4xl);
}

.about-intro__text h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.about-intro__text p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

/* Philosophy cards */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.philosophy-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
}

.philosophy-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-4);
  background: var(--color-accent-50);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  color: var(--color-accent-600);
}

.philosophy-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.philosophy-card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   BUSINESS PAGE
   ============================================================ */

.biz-categories {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-12);
}

.biz-category-btn {
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  background: var(--color-gray-50);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-in-out);
}

.biz-category-btn:hover {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
}

.biz-category-btn--active {
  background: var(--color-primary-600);
  color: var(--color-white);
  border-color: var(--color-primary-600);
}

.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 22, 40, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.modal-overlay--active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.modal-overlay--active .modal {
  transform: translateY(0);
}

.modal__header {
  padding: var(--space-6) var(--space-8);
  border-bottom: 1px solid var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal__title {
  font-size: var(--text-2xl);
  font-weight: 700;
}

.modal__close {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--color-gray-400);
  transition: all var(--duration-fast);
  cursor: pointer;
  background: var(--color-gray-50);
}

.modal__close:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.modal__body {
  padding: var(--space-8);
}

.modal__body p {
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

/* ============================================================
   MINING PAGE
   ============================================================ */

.mining-structure {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: center;
  text-align: center;
  margin: var(--space-12) 0;
}

.mining-partner {
  padding: var(--space-8);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 2px solid var(--color-gray-100);
}

.mining-partner__name {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.mining-partner__ratio {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  background: var(--color-accent-50);
  color: var(--color-accent-700);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
}

.mining-plus {
  font-size: var(--text-3xl);
  font-weight: 300;
  color: var(--color-gray-300);
}

.mining-result {
  padding: var(--space-8);
  background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-500));
  border-radius: var(--radius-xl);
  color: var(--color-white);
  text-align: center;
  grid-column: 1 / -1;
  margin-top: var(--space-4);
}

.mining-result__arrow {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.mining-result__name {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.mining-result__text {
  color: var(--color-gray-200);
  font-size: var(--text-sm);
}

/* Mining business cards */
.mining-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.mining-service-card {
  padding: var(--space-8);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-100);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.mining-service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-accent-200);
}

.mining-service-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary-50);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  color: var(--color-primary-600);
}

.mining-service-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.mining-service-card__list {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mining-service-card__list li {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  padding-left: var(--space-4);
  position: relative;
  line-height: var(--leading-relaxed);
}

.mining-service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  background: var(--color-accent-500);
  border-radius: 50%;
}

/* ============================================================
   HONORS PAGE
   ============================================================ */

/* Honor Badge Cards (top section) */
.honor-badge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.honor-card {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-6) var(--space-6);
  text-align: center;
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.honor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.honor-card--primary {
  border-top: 4px solid var(--color-primary-500);
}

.honor-card--gold {
  border-top: 4px solid var(--color-accent-500);
}

.honor-card--green {
  border-top: 4px solid #059669;
}

.honor-card__ribbon {
  position: absolute;
  top: 16px;
  right: -28px;
  padding: var(--space-1) var(--space-8);
  background: var(--color-primary-600);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  transform: rotate(45deg);
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.honor-card__ribbon--gold {
  background: var(--color-accent-600);
}

.honor-card__ribbon--green {
  background: #059669;
}

.honor-card__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-600);
}

.honor-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-primary-900);
}

.honor-card__desc {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.honor-card__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-gray-50);
  color: var(--color-gray-500);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
}

/* Honor List (subsidiary achievements) */
.honor-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.honor-item {
  display: flex;
  gap: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  border: 1px solid var(--color-gray-100);
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.honor-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-200);
}

.honor-item__badge {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-accent-500), var(--color-accent-600));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--text-2xl);
}

.honor-item__content {
  flex: 1;
}

.honor-item__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-900);
  margin-bottom: var(--space-3);
}

.honor-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.honor-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

.honor-tag--gold {
  background: var(--color-accent-50);
  color: var(--color-accent-700);
}

.honor-tag--blue {
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

.honor-tag--green {
  background: #ecfdf5;
  color: #059669;
}

.honor-item__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

/* Qualification Cards (Mining) */
.qualification-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.qual-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.qual-card__header {
  padding: var(--space-6) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.qual-card__grade {
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
}

.qual-card__grade--a {
  background: rgba(200, 164, 92, 0.2);
  color: var(--color-accent-400);
}

.qual-card__grade--b {
  background: rgba(59, 89, 153, 0.3);
  color: var(--color-primary-200);
}

.qual-card__count {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-white);
}

.qual-card__count span {
  font-size: 0.4em;
  font-weight: 500;
  color: var(--color-gray-300);
}

.qual-card__list {
  padding: var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.qual-card__list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-200);
  line-height: var(--leading-relaxed);
}

.qual-card__list li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
}

.qual-card:first-child .qual-card__list li::before {
  background: var(--color-accent-500);
}

.qual-card:last-child .qual-card__list li::before {
  background: var(--color-primary-300);
}

/* Qualification Stats */
.qual-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.qual-stat {
  text-align: center;
  padding: var(--space-6);
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.06);
}

.qual-stat__number {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-accent-400);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.qual-stat__number span {
  font-size: 0.4em;
  font-weight: 600;
}

.qual-stat__label {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  font-weight: 500;
}

/* Partner Cards */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.partner-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  border: 1px solid var(--color-gray-100);
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.partner-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-200);
}

.partner-card__icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary-50);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-600);
}

.partner-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary-900);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
}

.partner-card__text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-12);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info__item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--color-primary-600);
  flex-shrink: 0;
}

.contact-info__label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-1);
}

.contact-info__value {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-gray-800);
  line-height: var(--leading-relaxed);
}

/* Contact Form */
.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  border: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.form-label--required::after {
  content: ' *';
  color: var(--color-error);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-gray-800);
  background: var(--color-gray-50);
  transition: all var(--duration-fast) var(--ease-in-out);
  line-height: var(--leading-normal);
}

.form-input:hover,
.form-textarea:hover {
  border-color: var(--color-gray-300);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary-500);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(35, 64, 125, 0.08);
}

.form-input--error,
.form-textarea--error {
  border-color: var(--color-error);
}

.form-input--error:focus,
.form-textarea--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: none;
}

.form-error--visible {
  display: block;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form-success {
  text-align: center;
  padding: var(--space-10);
  display: none;
}

.form-success--visible {
  display: block;
}

.form-success__icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  color: var(--color-success);
}

.form-success__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.form-success__text {
  color: var(--color-gray-500);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  background: var(--color-primary-950);
  color: var(--color-gray-300);
  padding: var(--space-20) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-400));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 800;
  font-size: var(--text-lg);
}

.footer__logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-white);
}

.footer__desc {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  line-height: var(--leading-relaxed);
}

.footer__col-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  letter-spacing: var(--tracking-wide);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  transition: color var(--duration-fast);
}

.footer__links a:hover {
  color: var(--color-accent-400);
}

.footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer__bottom-links a {
  color: var(--color-gray-500);
  transition: color var(--duration-fast);
}

.footer__bottom-links a:hover {
  color: var(--color-gray-300);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes bounce-down {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(8px); }
  60% { transform: translateX(-50%) translateY(4px); }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s var(--ease-out-expo);
}

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

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  :root {
    --container-padding: var(--space-4);
    --header-height: 68px;
  }

  .feature-grid,
  .biz-grid,
  .mining-service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

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

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

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .mining-structure {
    grid-template-columns: 1fr;
  }

  .mining-plus {
    transform: rotate(90deg);
  }

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

  .qualification-grid {
    grid-template-columns: 1fr;
  }

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

  .honor-item {
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-5);
  }

  .honor-card {
    padding: var(--space-12) var(--space-5) var(--space-5);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .section-title {
    font-size: var(--text-3xl);
  }

  .hero__title {
    font-size: clamp(1.75rem, 4vw, 3rem);
  }
}

@media (max-width: 768px) {
  .header__menu-btn {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    padding: calc(var(--header-height) + var(--space-6)) var(--space-6) var(--space-6);
    gap: var(--space-1);
    transition: right var(--duration-normal) var(--ease-out-expo);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-dropdown);
  }

  .nav--open {
    right: 0;
  }

  .nav__link {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    border-radius: var(--radius-md);
  }

  .feature-grid,
  .biz-grid,
  .mining-service-grid {
    grid-template-columns: 1fr;
  }

  .stats-row {
    grid-template-columns: 1fr 1fr;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .biz-categories {
    gap: var(--space-2);
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .section-header {
    margin-bottom: var(--space-10);
  }

  .modal {
    max-height: 90vh;
    border-radius: var(--radius-xl);
  }

  .contact-form {
    padding: var(--space-6);
  }

  .stat-item__number {
    font-size: var(--text-3xl);
  }

  .honor-badge-grid,
  .partner-grid {
    grid-template-columns: 1fr;
  }

  .honor-card__ribbon {
    right: -34px;
    font-size: 10px;
  }

  .qual-stats {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --header-height: 64px;
  }

  .stats-row {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .page-hero {
    padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-10);
  }

  .page-hero__title {
    font-size: var(--text-3xl);
  }

  .modal__header {
    padding: var(--space-4) var(--space-5);
  }

  .modal__body {
    padding: var(--space-5);
  }
}

/* ============================================================
   PRINT & ACCESSIBILITY
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

@media (prefers-contrast: high) {
  :root {
    --color-gray-400: #595959;
    --color-gray-300: #404040;
  }

  .btn--primary {
    background: var(--color-accent-700);
  }
}

@media print {
  .header,
  .hero__indicators,
  .hero__scroll-hint,
  .header__menu-btn {
    display: none !important;
  }

  .hero {
    min-height: auto;
  }

  .hero__slide {
    position: static;
    opacity: 1;
  }

  body {
    font-size: 12pt;
    color: #000;
  }
}