/* ============================================
   ITF Technology — Design System & Styles
   专业软件开发公司官网
   ============================================ */

/* ============================================
   1. DESIGN TOKENS
   ============================================ */
:root {
  /* --- Primary (Blue) --- */
  --color-primary-900: #080c14; /* 现代暗空蓝黑 */
  --color-primary-800: #0d1527; /* 现代暗灰蓝 */
  --color-primary-700: #121d36;
  --color-primary-600: #1a4faa;
  --color-primary-500: #2563eb;
  --color-primary-400: #3b82f6;
  --color-primary-300: #60a5fa;
  --color-primary-200: #93bbfd;
  --color-primary-100: #dbeafe;
  --color-primary-050: #eff6ff;

  /* --- Accent --- */
  --color-accent: #00f2fe; /* 霓虹青蓝 */
  --color-accent-purple: #7000ff; /* 霓虹紫 */

  /* --- Glassmorphism --- */
  --glass-bg: rgba(255, 255, 255, 0.78);
  --glass-bg-dark: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(229, 231, 235, 0.6);
  --glass-border-dark: rgba(229, 231, 235, 0.5);

  /* --- Neutral --- */
  --color-neutral-900: #111827;
  --color-neutral-800: #1f2937;
  --color-neutral-700: #374151;
  --color-neutral-500: #6b7280;
  --color-neutral-400: #9ca3af;
  --color-neutral-300: #d1d5db;
  --color-neutral-200: #e5e7eb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-050: #f9fafb;

  /* --- Semantic --- */
  --color-success: #059669;
  --color-success-bg: #ecfdf5;
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;

  /* --- Typography --- */
  --font-sans: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  --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;

  /* --- Spacing (4px base) --- */
  --space-0:  0;
  --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;

  /* --- Border Radius --- */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl:  0 20px 30px -8px rgba(15,47,102,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --shadow-card-hover: 0 0 0 1px rgba(37,99,235,0.1), 0 20px 30px -8px rgba(15,47,102,0.12);

  /* --- Transitions --- */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-reveal: 600ms cubic-bezier(0.22, 0.61, 0.36, 1);

  /* --- Layout --- */
  --container: 1200px;
}


/* ============================================
   2. RESET & BASE
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-neutral-700);
  background: var(--color-neutral-050);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}


/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--color-neutral-900);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-6xl);
  line-height: 1.1;
}

h2 {
  font-size: var(--text-4xl);
  line-height: var(--leading-tight);
}

h3 {
  font-size: var(--text-2xl);
  line-height: var(--leading-snug);
}

p {
  color: var(--color-neutral-500);
}

strong {
  font-weight: 600;
}

/* Section kicker / eyebrow */
.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  color: var(--color-primary-600);
  background: var(--color-primary-050);
  border: 1px solid var(--color-primary-100);
}

.section-kicker.light {
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.2);
}


/* ============================================
   4. LAYOUT UTILITIES
   ============================================ */
.container {
  width: min(var(--container), calc(100% - var(--space-8)));
  margin: 0 auto;
}

.section {
  padding: var(--space-24) 0;
}

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

.section-muted {
  background: var(--color-neutral-100);
}

.section-head {
  margin-bottom: var(--space-12);
}

.section-head.center {
  text-align: center;
}

.section-head.center .section-kicker {
  margin: 0 auto var(--space-6);
}

.section-head h2 {
  margin-bottom: var(--space-4);
}

.section-head p {
  max-width: 640px;
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.section-head.center p {
  margin: 0 auto;
}


/* ============================================
   5. SKIP TO CONTENT (Accessibility)
   ============================================ */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary-500);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}
.skip-to-content:focus {
  top: var(--space-4);
}


/* ============================================
   6. HEADER & NAVIGATION
   ============================================ */
.site-header {
  padding: var(--space-2) 0;
  background: #fff;
  border-bottom: 1px solid var(--color-neutral-200);
}

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

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Brand / Logo */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  box-shadow: 0 4px 12px rgba(37,99,235,0.25);
}

.brand-name {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-neutral-900);
}

/* Nav Links */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav a {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-neutral-500);
  transition: color var(--transition-fast);
  padding: var(--space-1) 0;
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--color-primary-500);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.nav a:hover,
.nav a.is-active {
  color: var(--color-primary-600);
}

.nav a.is-active::after {
  transform: scaleX(1);
}

.nav-btn {
  padding: var(--space-2) var(--space-5) !important;
  color: #fff !important;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
  border-radius: var(--radius-md);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(37,99,235,0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-btn::after {
  display: none !important;
}

.nav-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37,99,235,0.35);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: var(--color-neutral-100);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-neutral-700);
  border-radius: 999px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}


/* ============================================
   7. BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-width: 120px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
  box-shadow: 0 2px 8px rgba(37,99,235,0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(37,99,235,0.35);
}

.btn-secondary {
  color: var(--color-primary-600);
  background: #fff;
  border: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  border-color: var(--color-primary-300);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}


/* ============================================
   8. HERO SECTION (品牌形象)
   ============================================ */
.hero-banner-section {
  position: relative;
  background: linear-gradient(135deg, rgba(11, 19, 41, 0.88) 0%, rgba(15, 23, 42, 0.78) 100%), url("images/hero_banner_bg.jpg") center center / cover no-repeat;
  padding: var(--space-20) 0 var(--space-24);
  color: #fff;
  overflow: hidden;
}


.hero-banner-section .eyebrow {
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.35);
}

.hero-banner-section h1 {
  color: #ffffff;
}

.hero-banner-section h1 span {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-banner-section .hero-desc {
  color: #cbd5e1;
}

.hero-banner-section .btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hero-banner-section .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
  color: #ffffff;
}

.hero-banner-section .floating-card {
  background: rgba(15, 23, 42, 0.75);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.hero-banner-section .floating-card-info strong {
  color: #ffffff;
}

.hero-banner-section .floating-card-info span {
  color: #94a3b8;
}

.hero-banner-section .kpi-card .kpi-card-lbl {
  color: #94a3b8;
}

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

/* --- Hero Left: 3D Image & Floating Cards --- */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  perspective: 1000px; /* 3D透视 */
}

.hero-glow-circle {
  position: absolute;
  top: 10%;
  left: 10%;
  width: 80%;
  height: 80%;
  background: radial-gradient(circle, rgba(37,99,235,0.3) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  animation: pulse-glow 6s ease-in-out infinite alternate;
}

.hero-main-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-2xl);
  transform: rotateY(-10deg) rotateX(6deg) rotateZ(-1deg);
  box-shadow: 
    0 15px 35px -5px rgba(15,47,102,0.2), 
    0 5px 15px -3px rgba(0,0,0,0.15),
    inset 0 1px 0 rgba(255,255,255,0.15);
  position: relative;
  z-index: 1;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.hero-image-wrapper:hover .hero-main-img {
  transform: rotateY(-4deg) rotateX(3deg) rotateZ(0deg);
  box-shadow: 
    0 25px 45px -5px rgba(15,47,102,0.3), 
    0 10px 25px -3px rgba(0,0,0,0.2);
}

/* Floating Card style (毛玻璃悬浮卡) */
.floating-card {
  position: absolute;
  z-index: 2;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: transform var(--transition-slow);
}

.floating-card:hover {
  transform: scale(1.05) translate3d(0, -3px, 10px);
}

/* Card 1: Status */
.status-card {
  top: 15%;
  left: -10%;
  padding: var(--space-3) var(--space-4);
  animation: float-slow 5s ease-in-out infinite;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 12px #10b981;
  flex-shrink: 0;
  animation: pulse-dot 2s ease-in-out infinite;
}

.floating-card-info {
  display: flex;
  flex-direction: column;
}

.floating-card-info strong {
  font-size: var(--text-sm);
  color: var(--color-neutral-900);
  line-height: 1.2;
}

.floating-card-info span {
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
}

/* Card 2: KPI */
.kpi-card {
  bottom: 12%;
  right: -8%;
  padding: var(--space-4) var(--space-5);
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  background: var(--glass-bg);
  border-color: var(--glass-border);
  animation: float-fast 4s ease-in-out infinite;
}

.kpi-card .kpi-card-val {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-primary-600);
  line-height: 1;
}

.kpi-card .kpi-card-lbl {
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
  font-weight: 500;
}

/* --- Hero Right: Copy --- */
.hero-copy {
  padding: var(--space-6) 0;
}

.hero-copy .eyebrow {
  margin-bottom: var(--space-5);
}

.hero-copy h1 {
  font-size: clamp(2.5rem, 5.5vw, 3.75rem);
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.hero-copy h1 span {
  color: var(--color-primary-500);
}

.hero-desc {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-neutral-500);
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}


/* ============================================
   9. PRODUCT CARDS (产品矩阵)
   ============================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  cursor: pointer;
}

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

.product-card-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-050);
  color: var(--color-primary-500);
  margin-bottom: var(--space-5);
}

.product-card-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.product-card-tag {
  display: inline-flex;
  align-self: flex-start;
  padding: var(--space-1) var(--space-2);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  color: var(--color-primary-600);
  background: var(--color-primary-050);
  margin-bottom: var(--space-3);
}

.product-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.product-card p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  flex: 1;
}

.product-card-footer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-500);
}

.product-card-arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
  font-size: var(--text-lg);
}

.product-card:hover .product-card-arrow {
  transform: translateX(4px);
}


/* ============================================
   10. SERVICE MATRIX (能力矩阵)
   ============================================ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.service-cell {
  padding: var(--space-6);
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.service-cell:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-200);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-050);
  color: var(--color-primary-500);
  margin-bottom: var(--space-5);
}

.service-icon svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-cell h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.service-cell p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin: 0;
}


/* ============================================
   11. SCENE CARDS (业务场景)
   ============================================ */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.scene-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-8) var(--space-6) var(--space-6);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  min-height: 300px;
}

/* Card 1 — 流程减负: cool blue */
.scene-card:nth-child(1) {
  background: linear-gradient(160deg, #eff6ff 0%, #dbeafe 40%, #bfdbfe 100%);
  border: 1px solid #bfdbfe;
}

/* Card 2 — 风险治理: indigo */
.scene-card:nth-child(2) {
  background: linear-gradient(160deg, #eef2ff 0%, #e0e7ff 40%, #c7d2fe 100%);
  border: 1px solid #c7d2fe;
}

/* Card 3 — 数据支撑: warmer blue (highlight) */
.scene-card:nth-child(3) {
  background: linear-gradient(160deg, #f0f9ff 0%, #e0f2fe 40%, #bae6fd 100%);
  border: 1px solid #7dd3fc;
}

/* Card 4 — 全面协同: slate blue */
.scene-card:nth-child(4) {
  background: linear-gradient(160deg, #f8fafc 0%, #f1f5f9 40%, #e2e8f0 100%);
  border: 1px solid #cbd5e1;
}

/* Decorative corner glow */
.scene-card::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.7), transparent 70%);
  pointer-events: none;
}

.scene-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px -12px rgba(15,47,102,0.15);
}

/* Icon container — white elevated circle */
.scene-card-icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-xl);
  background: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.scene-card:nth-child(1) .scene-card-icon { color: #2563eb; }
.scene-card:nth-child(2) .scene-card-icon { color: #4f46e5; }
.scene-card:nth-child(3) .scene-card-icon { color: #0284c7; }
.scene-card:nth-child(4) .scene-card-icon { color: #475569; }

.scene-card-icon svg {
  width: 32px;
  height: 32px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Card number watermark */
.scene-card::before {
  content: attr(data-index);
  position: absolute;
  top: var(--space-4);
  right: var(--space-5);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(255,255,255,0.7);
  pointer-events: none;
  z-index: 0;
}

.scene-card h3 {
  position: relative;
  z-index: 1;
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  color: var(--color-neutral-800);
}

.scene-card p {
  position: relative;
  z-index: 1;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-neutral-600);
  margin: 0;
  flex: 1;
}


/* ============================================
   12. ABOUT SECTION (关于我们)
   ============================================ */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

/* About Left: 3D Layout with Floating Cards */
.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 480px;
  perspective: 1000px;
}

.about-glow-circle {
  position: absolute;
  bottom: 5%;
  right: 5%;
  width: 75%;
  height: 75%;
  background: radial-gradient(circle, rgba(96,165,250,0.25) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

.about-main-img {
  width: 100%;
  height: auto;
  position: relative;
  z-index: 1;
}


/* Floating Glass Stat */
.about-glass-stat {
  position: absolute;
  top: -8%;
  left: -8%;
  z-index: 2;
  padding: var(--space-5) var(--space-6);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  color: var(--color-neutral-800);
  text-align: center;
  animation: float-slow 4.5s ease-in-out infinite;
}

.about-glass-stat .stat-num {
  display: block;
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-800));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.about-glass-stat .stat-lbl {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-neutral-500);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Floating Philosophy card */
.about-glass-card {
  position: absolute;
  bottom: -6%;
  right: -5%;
  z-index: 2;
  padding: var(--space-4) var(--space-5);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  max-width: 320px;
  animation: float-fast 5.5s ease-in-out infinite;
}

.about-glass-card:hover {
  transform: scale(1.03);
}

.glass-card-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-050);
  color: var(--color-primary-500);
}

.glass-card-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.glass-card-text strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-neutral-800);
  margin-bottom: var(--space-1);
  line-height: 1.3;
}

.glass-card-text span {
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
}

/* About Right */
.about-copy .section-kicker {
  margin-bottom: var(--space-4);
}

.about-copy h2 {
  margin-bottom: var(--space-5);
}

.about-copy > p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.about-points {
  display: grid;
  gap: var(--space-4);
}

.about-point {
  padding-left: var(--space-5);
  border-left: 3px solid var(--color-primary-400);
}

.about-point strong {
  display: block;
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
  color: var(--color-neutral-800);
}

.about-point span {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
  line-height: var(--leading-relaxed);
}


/* ============================================
   13. CONTACT BAND
   ============================================ */
.contact-band {
  padding: var(--space-20) 0;
  background: linear-gradient(160deg, var(--color-primary-600), var(--color-primary-800));
}

.contact-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-10);
  align-items: center;
  padding: var(--space-10);
  background: #fff;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

.contact-copy .section-kicker {
  margin-bottom: var(--space-4);
}

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

.contact-copy > p {
  font-size: var(--text-base);
  margin-bottom: var(--space-6);
}

.contact-list {
  display: grid;
  gap: var(--space-3);
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-neutral-700);
  padding: var(--space-3) var(--space-4);
  background: var(--color-neutral-050);
  border-radius: var(--radius-md);
}

.contact-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary-400);
  flex-shrink: 0;
}

/* Contact QR placeholder */
.contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

.qr-placeholder {
  width: 120px;
  height: 120px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-xl);
  background: var(--color-neutral-100);
  border: 2px dashed var(--color-neutral-300);
  color: var(--color-neutral-400);
}

.qr-placeholder svg {
  width: 48px;
  height: 48px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-qr span {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
}









/* ============================================
   14. NO-LOGO CENTERED FOOTER STYLES
   ============================================ */
.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 80px;
  max-height: 85px;
  width: auto;
  display: block;
}

.site-footer {
  background: #0b1328;
  color: #94a3b8;
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 15px;
}

.footer-main-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-8);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-contact-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 720px;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 16px;
  color: #cbd5e1;
}

.contact-detail-item svg {
  color: #38bdf8;
  flex-shrink: 0;
}

.detail-label {
  color: #94a3b8;
  font-weight: 500;
}

.detail-val {
  color: #f8fafc;
  font-weight: 500;
  text-decoration: none;
}

.detail-phone {
  font-size: 20px;
  font-weight: 700;
  color: #38bdf8;
}

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

.detail-val a:hover {
  color: #38bdf8;
}

.footer-qr-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.qr-code-card {
  padding: 6px;
  background: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

.qr-image {
  width: 135px;
  height: 135px;
  display: block;
  border-radius: var(--radius-md);
}

.qr-text {
  font-size: 14px;
  font-weight: 600;
  color: #e2e8f0;
  margin: 0;
  text-align: center;
}

/* Bottom Bar */
.footer-bottom-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-6);
  font-size: 13px;
  color: #64748b;
}

.copyright-text {
  margin: 0;
  color: #94a3b8;
}

.beian-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.beian-item {
  color: #94a3b8;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.beian-item:hover {
  color: #ffffff;
}

.gongan-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.gongan-item img {
  width: 16px;
  height: 16px;
}

.sep {
  color: rgba(255, 255, 255, 0.15);
}

@media (max-width: 768px) {
  .footer-main-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-bottom-line {
    flex-direction: column;
    text-align: center;
  }
}


/* ============================================
   15. ANIMATIONS
   ============================================ */

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

/* Floating animation for badges */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-10px) rotate(1deg); }
}

@keyframes float-fast {
  0%, 100% { transform: translateY(0) rotate(1deg); }
  50% { transform: translateY(-7px) rotate(-1deg); }
}

@keyframes pulse-glow {
  0% { transform: scale(0.9); opacity: 0.6; }
  100% { transform: scale(1.1); opacity: 0.9; }
}

/* Fade in */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Pulse dot */
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.badge-dot {
  animation: pulse-dot 2s ease-in-out infinite;
}


/* ============================================
   16. ACCESSIBILITY
   ============================================ */

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: 2px;
}

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


/* ============================================
   17. RESPONSIVE
   ============================================ */

/* Tablet landscape & below (≤1024px) */
@media (max-width: 1024px) {
  .hero-grid,
  .about-layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .hero-copy h1 {
    font-size: var(--text-5xl);
  }

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

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

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

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

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

  .hero-visual {
    order: -1;
  }

  .dashboard-card {
    max-width: 100%;
  }
}

/* Tablet portrait (≤820px) */
@media (max-width: 820px) {
  :root {
    --container: calc(100% - var(--space-8));
  }

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

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }

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

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 56px;
    right: var(--space-4);
    left: var(--space-4);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    padding: var(--space-4);
    border-radius: var(--radius-xl);
    background: #fff;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-neutral-200);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
  }

  .nav a::after {
    display: none;
  }

  .nav a:hover {
    background: var(--color-neutral-050);
  }

  .nav a.is-active {
    background: var(--color-primary-050);
    color: var(--color-primary-600);
  }

  .nav-btn {
    text-align: center;
    margin-top: var(--space-2);
  }
}

/* Mobile (≤640px) */
@media (max-width: 640px) {
  .product-grid,
  .service-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .about-layout {
    gap: var(--space-8);
  }

  .about-visual {
    gap: var(--space-3);
  }

  .hero-copy h1 {
    font-size: var(--text-3xl);
  }

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

  .hero-actions .btn {
    width: 100%;
  }

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

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

  .section {
    padding: var(--space-12) 0;
  }

  /* 移动端下浮动卡片位置微调防溢出 */
  .status-card {
    left: -2%;
    top: 8%;
  }
  .kpi-card {
    right: -2%;
    bottom: 8%;
  }
  .about-glass-stat {
    left: -2%;
    top: -5%;
  }
  .about-glass-card {
    right: -2%;
    bottom: -3%;
    max-width: 270px;
  }
}