/* ============================================================
   惠州灵禾科技有限公司 · 品牌官网样式
   VI: 灵禾环球 · 极简科技风
   主色 #2563EB 科技蓝 | 辅助 #64748B 灰
   ============================================================ */

:root {
  /* Color System - Tech Blue + Slate Gray */
  --c-primary: #2563EB;
  --c-primary-light: #3B82F6;
  --c-primary-dark: #1E40AF;
  --c-primary-50: #EFF6FF;
  --c-primary-100: #DBEAFE;
  --c-secondary: #64748B;
  --c-secondary-light: #94A3B8;
  --c-text: #1E293B;
  --c-text-secondary: #475569;
  --c-text-tertiary: #64748B;
  --c-text-quaternary: #94A3B8;
  --c-bg: #FFFFFF;
  --c-bg-subtle: #F8FAFC;
  --c-bg-hover: #F1F5F9;
  --c-border: #E2E8F0;
  --c-border-light: #F1F5F9;
  --c-border-strong: #CBD5E1;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --display-size: clamp(2.5rem, 5vw, 4rem);
  --h1-size: clamp(2rem, 3.5vw, 2.75rem);
  --h2-size: clamp(1.5rem, 2.5vw, 2rem);
  --h3-size: 1.25rem;
  --body-size: 15px;
  --small-size: 13px;
  --caption-size: 12px;

  /* Spacing Scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-10: 48px;
  --space-12: 64px;
  --space-16: 80px;
  --space-20: 96px;
  --space-24: 128px;

  /* Radius - Unified system */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;

  /* Shadow - Minimal, layered */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.02);
  --shadow-card-hover: 0 8px 12px -2px rgba(0, 0, 0, 0.06), 0 4px 6px -3px rgba(0, 0, 0, 0.03);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  
  /* Legacy aliases for backward compatibility */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Legacy color aliases */
  --c-white: #FFFFFF;
  --c-bg-light: #F1F5F9;
  --c-bg-lighter: #F8FAFC;
  --c-text-light: #64748B;
  --c-primary: #2563EB;
  --c-secondary: #64748B;
  --max-w: 1200px;

  /* Layout */
  --container-max: 1200px;
  --container-padding: 24px;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.75;
  font-size: var(--body-size);
  font-weight: 400;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

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

.section {
  padding: var(--space-20) 0;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 14.5px;
  font-weight: 600;
  border-radius: 12px;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: -0.005em;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.5s ease, height 0.5s ease, opacity 0.5s ease;
  opacity: 0;
  pointer-events: none;
}
.btn:active::after {
  width: 200px;
  height: 200px;
  opacity: 1;
  transition: 0s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: var(--c-white);
  box-shadow:
    0 2px 6px rgba(37, 99, 235, 0.18),
    0 1px 2px rgba(0, 0, 0, 0.06);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 100%);
  transform: translateY(-2px);
  box-shadow:
    0 8px 20px rgba(37, 99, 235, 0.3),
    0 2px 6px rgba(37, 99, 235, 0.18);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-white);
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.38);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}
.btn-sm { padding: var(--space-2) var(--space-5); font-size: var(--small-size); border-radius: 10px; }
.btn-block { width: 100%; }

/* ============ 头部导航 ============ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  transition: background var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--c-border);
  box-shadow: var(--shadow-sm);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.logo-mark { display: block; }
.logo-mark img {
  display: block;
  object-fit: contain;
  border-radius: var(--radius-sm);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-text);
  letter-spacing: -0.01em;
}
.logo-text em {
  font-size: 11px;
  font-style: normal;
  color: var(--c-text-tertiary);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  gap: var(--space-1);
  align-items: center;
  flex: 1;
  justify-content: center;
}
.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-secondary);
  border-radius: var(--radius-md);
  position: relative;
  transition: all var(--duration-fast) var(--ease-out);
}
.nav-link:hover {
  color: var(--c-text);
  background: var(--c-bg-hover);
}
.nav-link.active {
  color: var(--c-primary);
  background: var(--c-primary-50);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}
.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--small-size);
  font-weight: 500;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  color: var(--c-text-tertiary);
  transition: all var(--duration-fast) var(--ease-out);
}
.lang-toggle:hover {
  border-color: var(--c-border-strong);
  color: var(--c-text);
}
.lang-toggle .lang-zh { color: var(--c-text); font-weight: 600; }
.lang-toggle.en .lang-zh { color: var(--c-text-tertiary); font-weight: 500; }
.lang-toggle.en .lang-en { color: var(--c-text); font-weight: 600; }
.lang-divider { color: var(--c-border); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero 首屏 ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 40px) 0 var(--space-16);
  background: #0F172A url('images/banner-bg.jpg') center/cover no-repeat;
  overflow: hidden;
  color: var(--c-white);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.80) 0%, rgba(15, 23, 42, 0.65) 50%, rgba(15, 23, 42, 0.85) 100%),
    radial-gradient(ellipse 50% 60% at 80% 50%, rgba(37, 99, 235, 0.12), transparent 70%);
  pointer-events: none;
  z-index: 1;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 65%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 65%);
  pointer-events: none;
}
.orbit {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.orbit-1 { width: 600px; height: 600px; animation: spin 60s linear infinite; }
.orbit-2 { width: 900px; height: 900px; border-color: rgba(37, 99, 235, 0.08); animation: spin 90s linear infinite reverse; }
.orbit-3 { width: 1200px; height: 1200px; border-color: rgba(255, 255, 255, 0.03); animation: spin 120s linear infinite; }

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-logo-watermark {
  position: absolute;
  left: -40px;
  bottom: -20px;
  width: 480px;
  height: 480px;
  object-fit: contain;
  opacity: 0.04;
  transform: rotate(-6deg);
  pointer-events: none;
  user-select: none;
}

.hero-globe {
  position: absolute;
  right: -100px;
  top: 50%;
  transform: translateY(-50%);
  width: 600px;
  height: 600px;
  opacity: 0.45;
  animation: floatGlobe 8s ease-in-out infinite;
  filter: drop-shadow(0 0 60px rgba(37, 99, 235, 0.12));
}
@keyframes floatGlobe {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50% { transform: translateY(-48%) translateX(-8px); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: 9px 18px 9px 14px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.05em;
  border: 1px solid rgba(96, 165, 250, 0.3);
  color: rgba(255, 255, 255, 0.82);
  border-radius: 999px;
  margin-bottom: var(--space-8);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.14), rgba(255, 255, 255, 0.04));
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  position: relative;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.hero-tag::before {
  content: '';
  width: 7px;
  height: 7px;
  background: #60A5FA;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(96, 165, 250, 0.8), 0 0 20px rgba(96, 165, 250, 0.4);
  animation: pulse-dot 2.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.85; }
}
.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  color: #ffffff;
}
.title-sep {
  color: rgba(255, 255, 255, 0.4);
  font-weight: 300;
}
.hero-sub {
  font-size: clamp(1rem, 1.3vw, 1.25rem);
  font-weight: 400;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  margin-bottom: var(--space-10);
  letter-spacing: -0.005em;
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 6px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(100, 116, 139, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  max-width: 720px;
  position: relative;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.hero-stats::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.3), transparent 40%, rgba(148, 163, 184, 0.25));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-6) var(--space-4);
  position: relative;
  text-align: center;
  border-radius: 16px;
  transition: all var(--duration-base) var(--ease-out);
}
.stat:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-2px);
}
.stat:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.15), transparent);
}
.stat strong {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(180deg, #ffffff 0%, #93C5FD 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  letter-spacing: -0.02em;
  font-family: 'Inter', sans-serif;
  filter: drop-shadow(0 2px 8px rgba(96, 165, 250, 0.25));
}
.stat span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.03em;
  font-weight: 400;
  line-height: 1.4;
}

.scroll-cue {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 46px;
  border: 1.5px solid rgba(255, 255, 255, 0.28);
  border-radius: 14px;
  z-index: 2;
  opacity: 0.8;
  transition: all var(--duration-base);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
}
.scroll-cue:hover {
  border-color: rgba(96, 165, 250, 0.6);
  opacity: 1;
  transform: translateX(-50%) translateY(-2px);
}
.scroll-cue span {
  display: block;
  width: 4px;
  height: 8px;
  background: linear-gradient(180deg, #60A5FA, rgba(255, 255, 255, 0.6));
  border-radius: 2px;
  animation: scrollCue 2.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  box-shadow: 0 0 8px rgba(96, 165, 250, 0.5);
}
@keyframes scrollCue {
  0% { opacity: 0; transform: translateY(0); }
  20% { opacity: 1; }
  60% { opacity: 1; transform: translateY(14px); }
  100% { opacity: 0; transform: translateY(16px); }
}

/* ============ 通用 Section ============ */
.section {
  padding: var(--space-20) 0;
  position: relative;
}
.section-head {
  text-align: left;
  max-width: 760px;
  margin: 0 auto var(--space-12);
  position: relative;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-primary);
  margin-bottom: var(--space-5);
  padding: 6px 14px 6px 10px;
  background: linear-gradient(135deg, var(--c-primary-50), rgba(100, 116, 139, 0.06));
  border-radius: 999px;
  line-height: 1;
  border: 1px solid rgba(37, 99, 235, 0.12);
  position: relative;
  overflow: hidden;
}
.section-tag::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-primary);
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(37, 99, 235, 0.5);
}
.section-tag::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  animation: tag-shine 4s ease-in-out infinite;
}
@keyframes tag-shine {
  0%, 100% { left: -100%; }
  50% { left: 100%; }
}
.section-title {
  font-size: var(--h1-size);
  font-weight: 700;
  background: linear-gradient(180deg, var(--c-text) 0%, var(--c-text-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-5);
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  margin: var(--space-5) 0 0;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary-light));
  border-radius: 2px;
  position: relative;
}
.section-title::before {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  margin: 0 0 var(--space-4);
  background: linear-gradient(90deg, var(--c-secondary-light), transparent);
  border-radius: 2px;
  opacity: 0.3;
}
.section-desc {
  font-size: 15px;
  color: var(--c-text-tertiary);
  line-height: 1.85;
  font-weight: 400;
  letter-spacing: -0.005em;
  max-width: 640px;
}

/* ============ 关于我们 ============ */
.about { background: var(--c-bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
  align-items: start;
}
.about-intro h3,
.adv-title,
.qual-grid h3,
.qual-environment h3,
.qual-vi h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: var(--space-5);
  padding-left: var(--space-4);
  border-left: 3px solid var(--c-primary);
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.about-intro p {
  font-size: var(--body-size);
  color: var(--c-text-secondary);
  margin-bottom: var(--space-5);
  line-height: 1.85;
  letter-spacing: -0.005em;
}
.about-intro-image {
  margin-top: var(--space-6);
  border-radius: 20px;
  overflow: hidden;
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.08),
    0 2px 6px rgba(0, 0, 0, 0.04);
  position: relative;
}
.about-intro-image::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), transparent 50%, rgba(100, 116, 139, 0.2));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 2;
}
.about-intro-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, 0.12) 100%);
  z-index: 1;
}
.about-intro-image img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.about-intro-image:hover img {
  transform: scale(1.04);
}

.about-philosophy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.philosophy-card {
  padding: var(--space-6) var(--space-6) var(--space-6) 28px;
  background: var(--c-bg-subtle);
  border-radius: 16px;
  border: 1px solid var(--c-border-light);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.philosophy-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-primary), var(--c-secondary-light));
  border-radius: 0 2px 2px 0;
}
.philosophy-card::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06), transparent 70%);
  border-radius: 50%;
  transition: all var(--duration-slow);
  opacity: 0;
}
.philosophy-card:hover {
  border-color: var(--c-border-strong);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);
  background: var(--c-bg);
}
.philosophy-card:hover::after {
  opacity: 1;
  transform: scale(1.2);
}
.philosophy-icon {
  color: var(--c-primary);
  margin-bottom: 12px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(100, 116, 139, 0.06));
  border-radius: 12px;
}
.philosophy-card h4 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.philosophy-card p {
  font-size: 13.5px;
  color: var(--c-text-light);
  line-height: 1.85;
}
.qualification-card {
  background: linear-gradient(135deg, rgba(100, 116, 139, 0.06), rgba(37, 99, 235, 0.08));
  border-color: rgba(100, 116, 139, 0.2);
}
.qualification-card::before {
  background: linear-gradient(180deg, var(--c-secondary), var(--c-primary));
}

/* 四大优势 */
.advantages {
  padding: var(--space-12);
  background: linear-gradient(180deg, var(--c-bg-subtle) 0%, rgba(100, 116, 139, 0.03) 100%);
  border-radius: 28px;
  border: 1px solid var(--c-border-light);
  position: relative;
  overflow: hidden;
}
.advantages::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06), transparent 65%);
  pointer-events: none;
}
.advantages::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(100, 116, 139, 0.05), transparent 65%);
  pointer-events: none;
}
.adv-title {
  text-align: center;
  margin-bottom: 44px;
  border-left: none;
  padding-left: 0;
  font-size: 24px;
  position: relative;
  z-index: 1;
  color: var(--c-text);
}
.adv-title::after {
  content: '';
  display: block;
  width: 44px;
  height: 3px;
  margin: 14px auto 0;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary-light));
  border-radius: 2px;
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  position: relative;
  z-index: 1;
}
.adv-card {
  position: relative;
  padding: var(--space-8) var(--space-6);
  background: var(--c-bg);
  border-radius: 20px;
  border: 1px solid var(--c-border-light);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}
.adv-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2.5px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2;
}
.adv-card::after {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.05), transparent 70%);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
}
.adv-card:hover {
  transform: translateY(-6px);
  box-shadow:
    0 12px 28px rgba(0, 0, 0, 0.07),
    0 4px 8px rgba(0, 0, 0, 0.03);
  border-color: rgba(37, 99, 235, 0.18);
}
.adv-card:hover::before { transform: scaleX(1); }
.adv-card:hover::after {
  opacity: 1;
  transform: scale(1.3) translate(-10px, 10px);
}
.adv-num {
  font-size: 38px;
  font-weight: 800;
  background: linear-gradient(180deg, var(--c-border-strong), var(--c-border-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 12px;
  font-family: 'Inter', sans-serif;
  letter-spacing: -1px;
  transition: all 0.4s var(--ease-out);
}
.adv-card:hover .adv-num {
  background: linear-gradient(180deg, var(--c-primary), var(--c-secondary-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.adv-icon {
  color: var(--c-primary);
  margin-bottom: 16px;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(100, 116, 139, 0.06));
  border-radius: 14px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.adv-card:hover .adv-icon {
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: var(--c-white);
  transform: scale(1.08);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
}
.adv-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.adv-card p {
  font-size: 13.5px;
  color: var(--c-text-light);
  line-height: 1.85;
}

/* ============ 核心业务 ============ */
.services { background: var(--c-bg-subtle); }
.service-block {
  background: var(--c-bg);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--c-border-light);
  padding: var(--space-10);
  margin-bottom: var(--space-7);
  transition: all var(--duration-base) var(--ease-out);
}
.service-block:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--c-border);
}
.service-block-primary {
  background: var(--c-bg);
  position: relative;
  overflow: hidden;
}
.service-block-primary::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: var(--c-primary);
  pointer-events: none;
}
.service-block-head {
  display: flex;
  gap: 28px;
  margin-bottom: 36px;
  align-items: flex-start;
}
.service-block-num {
  flex-shrink: 0;
  width: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: var(--c-white);
  font-size: 22px;
  font-weight: 700;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
}
.service-block-titles { flex: 1; }
.service-block-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--c-secondary);
  background: rgba(100, 116, 139, 0.12);
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 10px;
}
.service-block-titles h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.service-block-titles p {
  font-size: 14.5px;
  color: var(--c-text-light);
  line-height: 1.85;
  max-width: 880px;
}

.service-platforms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  padding: 24px 28px;
  background: linear-gradient(135deg, var(--c-bg-lighter) 0%, rgba(37, 99, 235, 0.03) 100%);
  border-radius: 16px;
  margin-bottom: 36px;
  border: 1px solid var(--c-border-light);
  position: relative;
  overflow: hidden;
}
.service-platforms::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-primary), var(--c-secondary-light));
  border-radius: 0 2px 2px 0;
}
.platforms-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  background: var(--c-primary-50);
  border-radius: 8px;
}
.platforms, .categories {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.platform {
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-white);
  border: 1.5px solid rgba(37, 99, 235, 0.25);
  border-radius: 10px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.platform::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}
.platform span { position: relative; z-index: 1; }
.platform:hover {
  color: var(--c-white);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
}
.platform:hover::before { opacity: 1; }
.cat {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-secondary);
  background: rgba(100, 116, 139, 0.1);
  border-radius: 10px;
  border: 1px solid rgba(100, 116, 139, 0.15);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.cat:hover {
  background: var(--c-white);
  border-color: rgba(100, 116, 139, 0.3);
  color: var(--c-text-secondary);
  transform: translateY(-1px);
}

.service-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
}
.service-item {
  padding: 24px 22px;
  background: var(--c-white);
  border: 1px solid var(--c-border-light);
  border-radius: 14px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.service-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.service-item::after {
  content: '';
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.04), transparent 70%);
  border-radius: 50%;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
}
.service-item:hover {
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-5px);
  box-shadow:
    0 10px 24px rgba(0, 0, 0, 0.06),
    0 2px 6px rgba(0, 0, 0, 0.03);
}
.service-item:hover::before { transform: scaleX(1); }
.service-item:hover::after {
  opacity: 1;
  transform: scale(1.5) translate(-10px, -10px);
}
.si-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(100, 116, 139, 0.06));
  color: var(--c-primary);
  border-radius: 12px;
  margin-bottom: 14px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  z-index: 1;
}
.service-item:hover .si-icon {
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: var(--c-white);
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.28);
}
.service-item h5 {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}
.service-item p {
  font-size: 12.5px;
  color: var(--c-text-light);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-block-sub {
  padding: 36px;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
}
.sb-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--c-border-light);
}
.sb-num {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-secondary), var(--c-secondary-light));
  color: var(--c-white);
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  box-shadow: 0 6px 14px rgba(100, 116, 139, 0.25);
}
.sb-head h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.4;
}
.sb-list li {
  position: relative;
  padding: 10px 0 10px 24px;
  font-size: 13.5px;
  color: var(--c-text-light);
  line-height: 1.8;
  border-bottom: 1px solid var(--c-bg-lighter);
}
.sb-list li:last-child { border-bottom: none; }
.sb-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 18px;
  width: 7px;
  height: 7px;
  background: var(--c-secondary);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(100, 116, 139, 0.15);
}

/* ============ 服务案例 ============ */
.cases { background: var(--c-white); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--c-bg);
  border-radius: 20px;
  border: 1px solid var(--c-border-light);
  overflow: hidden;
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
}
.case-card:hover {
  transform: translateY(-8px);
  box-shadow:
    0 16px 36px rgba(0, 0, 0, 0.08),
    0 4px 10px rgba(0, 0, 0, 0.04);
  border-color: rgba(37, 99, 235, 0.18);
}
.case-cover {
  position: relative;
  height: 185px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.case-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(15, 23, 42, 0.35) 100%);
  pointer-events: none;
  z-index: 1;
}
.case-cover-photo {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.case-card:hover .case-cover-photo {
  transform: scale(1.08);
}
.case-cover-photo::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.18) 0%, rgba(37, 99, 235, 0.04) 45%, rgba(15, 23, 42, 0.45) 100%);
  pointer-events: none;
  z-index: 0;
  transition: background 0.45s ease;
}
.case-card:hover .case-cover-photo::before {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.12) 0%, rgba(37, 99, 235, 0.02) 45%, rgba(15, 23, 42, 0.55) 100%);
}
.case-cover-photo::after {
  z-index: 1;
}
.case-cover-photo .case-cat {
  z-index: 2;
}
.case-cover svg {
  filter: drop-shadow(0 8px 16px rgba(0,0,0,0.15));
  transition: transform var(--transition-slow);
}
.case-card:hover .case-cover svg { transform: scale(1.1) rotate(-3deg); }
.case-cat {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 5px 13px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--c-white);
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-radius: 10px;
  letter-spacing: 0.06em;
  z-index: 2;
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.case-body {
  padding: 24px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.case-platforms {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.case-platforms span {
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--c-primary);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(37, 99, 235, 0.03));
  border-radius: 8px;
  border: 1px solid rgba(37, 99, 235, 0.12);
}
.case-body h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.case-summary {
  font-size: 13.5px;
  color: var(--c-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
  flex: 1;
}
.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  padding: 5px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(100, 116, 139, 0.05));
  border-radius: 12px;
  margin-bottom: 16px;
  position: relative;
  border: 1px solid rgba(37, 99, 235, 0.08);
}
.case-metrics div {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 8px;
  border-radius: 9px;
  background: var(--c-white);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.case-card:hover .case-metrics div {
  background: var(--c-bg);
}
.case-metrics div:not(:last-child) {
  margin-right: 4px;
  position: relative;
}
.case-metrics div:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -2px;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--c-border-light), transparent);
}
.case-metrics strong {
  font-size: 19px;
  font-weight: 800;
  background: linear-gradient(180deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  font-family: 'Inter', sans-serif;
  letter-spacing: -0.02em;
}
.case-metrics span {
  font-size: 10.5px;
  color: var(--c-text-light);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.case-toggle {
  align-self: flex-start;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  border: 1.5px solid rgba(37, 99, 235, 0.35);
  border-radius: 10px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  margin-top: auto;
  background: var(--c-primary-50);
}
.case-toggle:hover,
.case-card.expanded .case-toggle {
  background: var(--c-primary);
  color: var(--c-white);
  border-color: var(--c-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(37, 99, 235, 0.28);
}
.case-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, margin-top 0.4s ease, padding 0.4s ease;
  margin-top: 0;
}
.case-card.expanded .case-detail {
  max-height: 300px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--c-border-light);
}
.case-detail p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.85;
}

.case-card-cta {
  background: linear-gradient(160deg, var(--c-primary) 0%, #1E3A8A 60%, #0F172A 100%);
  border-color: transparent;
  color: var(--c-white);
  position: relative;
  overflow: hidden;
}
.case-card-cta::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.3), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.case-card-cta::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(100, 116, 139, 0.25), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.case-cover-cta {
  background-color: transparent;
}
.case-card-cta .case-body {
  position: relative;
  z-index: 1;
}
.case-card-cta .case-body h4 {
  color: var(--c-white);
  font-size: 19px;
  font-weight: 700;
  background: linear-gradient(180deg, #ffffff 0%, #93C5FD 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.case-card-cta .case-summary {
  color: rgba(255,255,255,0.78);
  line-height: 1.85;
}
.case-card-cta .case-cat {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border-color: rgba(255, 255, 255, 0.2);
}
.case-card-cta .btn-primary {
  background: rgba(255, 255, 255, 0.12);
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  color: var(--c-white);
  border-radius: 10px;
  padding: 9px 20px;
  font-weight: 600;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  align-self: flex-start;
  position: relative;
  z-index: 1;
}
.case-card-cta .btn-primary:hover {
  background: var(--c-white);
  color: var(--c-primary);
  border-color: var(--c-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ============ 服务流程 ============ */
.process {
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-subtle) 50%, var(--c-bg) 100%);
  position: relative;
}
.process-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
}
.process-flow::before {
  content: '';
  position: absolute;
  top: 52px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(37, 99, 235, 0.18) 8%,
    rgba(37, 99, 235, 0.28) 50%,
    rgba(37, 99, 235, 0.18) 92%,
    transparent 100%
  );
  z-index: 0;
}
.process-flow::after {
  content: '';
  position: absolute;
  top: 50px;
  left: 12%;
  right: 12%;
  height: 8px;
  background-image: radial-gradient(circle, rgba(37, 99, 235, 0.4) 1.5px, transparent 1.5px);
  background-size: 20px 8px;
  background-repeat: repeat-x;
  z-index: 0;
  opacity: 0.6;
  animation: flow-dots 3s linear infinite;
}
@keyframes flow-dots {
  from { background-position: 0 0; }
  to { background-position: 40px 0; }
}
.process-step {
  position: relative;
  padding: 44px 28px 36px;
  background: var(--c-bg);
  border-radius: 20px;
  border: 1px solid var(--c-border-light);
  text-align: center;
  z-index: 1;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: visible;
}
.process-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary) 0%, var(--c-primary-light) 50%, var(--c-secondary-light) 100%);
  border-radius: 3px 3px 0 0;
  opacity: 0;
  transform: scaleX(0.3);
  transform-origin: center;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.process-step::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.05), transparent 70%);
  border-radius: 50%;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
  pointer-events: none;
}
.process-step:hover {
  transform: translateY(-8px);
  box-shadow:
    0 16px 32px rgba(0, 0, 0, 0.07),
    0 4px 12px rgba(0, 0, 0, 0.04),
    0 0 0 1px rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.18);
}
.process-step:hover::before {
  opacity: 1;
  transform: scaleX(1);
}
.process-step:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1.4);
}
.ps-num {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: var(--c-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  letter-spacing: -0.02em;
  box-shadow:
    0 6px 16px rgba(37, 99, 235, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 3;
}
.ps-num::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px solid rgba(37, 99, 235, 0.25);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: -1;
}
.ps-num::after {
  content: '';
  position: absolute;
  inset: -13px;
  border-radius: 50%;
  border: 1px solid rgba(37, 99, 235, 0.12);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: -2;
}
.process-step:hover .ps-num {
  transform: translateX(-50%) scale(1.1);
  box-shadow:
    0 8px 24px rgba(37, 99, 235, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.process-step:hover .ps-num::before {
  border-color: rgba(37, 99, 235, 0.4);
  inset: -8px;
}
.process-step:hover .ps-num::after {
  border-color: rgba(37, 99, 235, 0.2);
  inset: -16px;
}
.ps-icon {
  width: 64px;
  height: 64px;
  margin: 8px auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, rgba(37, 99, 235, 0.06) 0%, rgba(100, 116, 139, 0.05) 100%);
  color: var(--c-primary);
  border-radius: 18px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  z-index: 1;
  border: 1px solid rgba(37, 99, 235, 0.08);
}
.process-step:hover .ps-icon {
  background: linear-gradient(145deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: var(--c-white);
  transform: scale(1.08);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.32);
  border-color: transparent;
}
.process-step h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
  transition: color 0.3s ease;
}
.process-step:hover h4 {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.process-step p {
  font-size: 13px;
  color: var(--c-text-tertiary);
  line-height: 1.9;
  position: relative;
  z-index: 1;
  margin: 0;
  transition: color 0.3s ease;
}
.process-step:hover p {
  color: var(--c-text-secondary);
}

/* ============ 资质实力 ============ */
.qualification { background: var(--c-bg); }
.qual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-12);
}
.cert-list { display: flex; flex-direction: column; gap: var(--space-4); }
.cert-card {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-6) var(--space-7);
  background: var(--c-bg-subtle);
  border-radius: var(--radius-xl);
  border: 1px solid var(--c-border-light);
  transition: all var(--duration-base) var(--ease-out);
}
.cert-card:hover {
  border-color: var(--c-border);
  transform: translateX(4px);
  box-shadow: var(--shadow-card-hover);
  background: var(--c-bg);
}
.cert-icon {
  flex-shrink: 0;
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: var(--c-white);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.2);
}
.cert-info { flex: 1; }
.cert-info h5 {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 4px;
}
.cert-info p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.7;
}
.cert-badge {
  flex-shrink: 0;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-secondary), var(--c-secondary-light));
  border-radius: 14px;
  box-shadow: 0 4px 10px rgba(100, 116, 139, 0.25);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.team-item {
  padding: 22px 22px;
  background: var(--c-bg-lighter);
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border-light);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}
.team-item::after {
  content: '';
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 70px;
  height: 70px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.05), transparent 70%);
  border-radius: 50%;
  transition: all var(--transition-slow);
}
.team-item:hover {
  background: var(--c-white);
  border-color: var(--c-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.team-item:hover::after {
  background: radial-gradient(circle, rgba(100, 116, 139, 0.12), transparent 70%);
  transform: scale(1.5);
}
.team-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-secondary);
  font-family: 'Inter', sans-serif;
  letter-spacing: 1px;
}
.team-item h5 {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--c-text);
  margin: 6px 0 8px;
}
.team-item p {
  font-size: 12.5px;
  color: var(--c-text-light);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.qual-environment { margin-bottom: 72px; }
.qual-environment h3 { margin-bottom: 28px; }
.env-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.env-item .env-img {
  height: 195px;
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--c-white);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(0, 0, 0, 0.04);
}
.env-item:hover .env-img {
  transform: translateY(-8px);
  box-shadow:
    0 16px 36px rgba(0, 0, 0, 0.1),
    0 4px 10px rgba(0, 0, 0, 0.05);
}
.env-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0,0,0,0.25));
  z-index: 1;
}
.env-img::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent 50%, rgba(100, 116, 139, 0.2));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  z-index: 2;
  pointer-events: none;
}
.env-img span { position: relative; z-index: 3; letter-spacing: 0.05em; }
.env-img svg { position: relative; z-index: 3; }
.env-img-photo {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.env-item:hover .env-img-photo {
  transform: scale(1.06);
}
.env-img-photo::after {
  z-index: 1;
}
.env-img-photo::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.20) 0%, rgba(37, 99, 235, 0.05) 40%, rgba(15, 23, 42, 0.55) 100%);
  z-index: 0;
  transition: background 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.env-img-photo span {
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.6);
  letter-spacing: 0.06em;
}
.env-img-photo:hover::before {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.12) 0%, rgba(37, 99, 235, 0.02) 40%, rgba(15, 23, 42, 0.65) 100%);
}

.qual-vi {}
.qual-vi h3 { margin-bottom: 28px; }
.vi-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 36px;
  background: linear-gradient(135deg, var(--c-bg-lighter), var(--c-bg-light));
  border-radius: var(--radius-xl);
  border: 1px solid var(--c-border-light);
}
.vi-color {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}
.vi-swatch {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 14px 8px;
  color: var(--c-white);
  text-align: center;
  transition: transform var(--transition);
  box-shadow: var(--shadow-sm);
}
.vi-swatch:hover { transform: translateY(-4px) scale(1.03); box-shadow: var(--shadow-md); }
.vs-name {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.vs-code {
  font-size: 11px;
  font-family: 'Inter', sans-serif;
  opacity: 0.85;
  margin-top: 3px;
}
.vi-desc p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.95;
}

/* ============ 新闻资讯 ============ */
.news { background: var(--c-bg-subtle); }
.news-tabs {
  display: flex;
  justify-content: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}
.news-tab {
  padding: var(--space-2) var(--space-5);
  font-size: var(--small-size);
  font-weight: 500;
  color: var(--c-text-tertiary);
  background: var(--c-bg);
  border: 1px solid var(--c-border-light);
  border-radius: 999px;
  transition: all var(--duration-fast) var(--ease-out);
}
.news-tab:hover { color: var(--c-text); border-color: var(--c-border); }
.news-tab.active {
  background: var(--c-primary);
  color: var(--c-bg);
  border-color: var(--c-primary);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.news-card {
  padding: var(--space-7) var(--space-6);
  background: var(--c-bg);
  border-radius: 20px;
  border: 1px solid var(--c-border-light);
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.news-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2;
}
.news-card::after {
  content: '';
  position: absolute;
  bottom: -50px;
  right: -50px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.04), transparent 70%);
  border-radius: 50%;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 0;
}
.news-card:hover {
  transform: translateY(-8px);
  box-shadow:
    0 16px 36px rgba(0, 0, 0, 0.07),
    0 4px 10px rgba(0, 0, 0, 0.03);
  border-color: rgba(37, 99, 235, 0.15);
}
.news-card:hover::before { transform: scaleX(1); }
.news-card:hover::after {
  opacity: 1;
  transform: scale(1.3) translate(-15px, -15px);
}
.news-card.hidden { display: none; }
.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.news-cat {
  padding: 5px 12px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--c-secondary);
  background: linear-gradient(135deg, rgba(100, 116, 139, 0.1), rgba(100, 116, 139, 0.05));
  border-radius: 9px;
  letter-spacing: 0.05em;
  border: 1px solid rgba(100, 116, 139, 0.15);
}
.news-date {
  font-size: 12px;
  color: var(--c-text-light);
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.news-card h4 {
  font-size: 17px;
  font-weight: 700;
  background: linear-gradient(180deg, var(--c-text) 0%, var(--c-text-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
  transition: all 0.3s ease;
}
.news-card:hover h4 {
  background: linear-gradient(180deg, var(--c-primary) 0%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.news-card p {
  font-size: 13.5px;
  color: var(--c-text-light);
  line-height: 1.85;
  margin-bottom: 20px;
  flex: 1;
  position: relative;
  z-index: 1;
}
.news-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  align-self: flex-start;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  position: relative;
  z-index: 1;
}
.news-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.news-link:hover {
  color: var(--c-secondary);
  transform: translateX(4px);
}
.news-link:hover svg {
  transform: translateX(3px);
}

/* ============ 联系我们 ============ */
.contact { background: linear-gradient(180deg, var(--c-bg-subtle) 0%, var(--c-bg) 100%); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: var(--space-16);
}
.contact-info { display: flex; flex-direction: column; gap: var(--space-4); }
.info-item {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-6);
  background: var(--c-white);
  border-radius: 16px;
  border: 1px solid var(--c-border-light);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.info-item::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-primary), var(--c-secondary-light));
  border-radius: 0 2px 2px 0;
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.info-item:hover {
  border-color: rgba(37, 99, 235, 0.18);
  transform: translateX(4px);
  box-shadow:
    0 10px 24px rgba(0, 0, 0, 0.06),
    0 2px 6px rgba(0, 0, 0, 0.03);
  background: var(--c-white);
}
.info-item:hover::after { transform: scaleY(1); }
.info-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: var(--c-white);
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  z-index: 1;
}
.info-item:hover .info-icon {
  transform: scale(1.06) rotate(-3deg);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.32);
}
.info-text { flex: 1; }
.info-label {
  display: block;
  font-size: 12px;
  color: var(--c-text-light);
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.info-text p {
  font-size: 14px;
  color: var(--c-text);
  font-weight: 500;
  line-height: 1.6;
}
.phone-list {
  font-size: 14px;
  color: var(--c-text);
  font-weight: 500;
  line-height: 1.7;
}
.phone-list a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--transition);
}
.phone-list a:hover { color: var(--c-secondary); }
.wechat-list {
  font-size: 14px;
  color: var(--c-text);
  font-weight: 500;
  line-height: 1.7;
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 24px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(100, 116, 139, 0.06));
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: var(--radius-lg);
}
.qr-code {
  background: var(--c-white);
  padding: 12px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.qr-code img {
  display: block;
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}
.qr-text { display: flex; flex-direction: column; gap: 6px; }
.qr-text strong {
  font-size: 15px;
  color: var(--c-text);
  font-weight: 700;
}
.qr-text span {
  font-size: 12.5px;
  color: var(--c-text-light);
}

.contact-form-wrap {
  padding: 44px 40px 36px;
  background: var(--c-white);
  border-radius: 24px;
  border: 1px solid var(--c-border-light);
  position: relative;
  overflow: hidden;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.05),
    0 1px 3px rgba(0, 0, 0, 0.02);
}
.contact-form-wrap::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg,
    var(--c-primary) 0%,
    var(--c-primary-light) 40%,
    var(--c-secondary-light) 80%,
    transparent 100%);
}
.contact-form-wrap::after {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.04), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.contact-form-wrap h3 {
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  position: relative;
}
.contact-form-wrap h3::after {
  content: '';
  display: block;
  width: 32px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-primary-light));
  border-radius: 3px;
  margin-top: 10px;
}
.form-sub {
  font-size: 13.5px;
  color: var(--c-text-tertiary);
  margin-bottom: 32px;
  line-height: 1.7;
  display: flex;
  align-items: center;
  gap: 8px;
}
.form-sub::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-field { display: flex; flex-direction: column; gap: 8px; position: relative; }
.form-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-secondary);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color 0.3s ease;
}
.form-field label::before {
  content: '';
  width: 3px;
  height: 12px;
  background: var(--c-border-strong);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.form-field:focus-within label {
  color: var(--c-primary);
}
.form-field:focus-within label::before {
  background: var(--c-primary);
  box-shadow: 0 0 6px rgba(37, 99, 235, 0.4);
}
.form-field input,
.form-field select,
.form-field textarea {
  padding: 13px 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--c-text);
  background: var(--c-bg-subtle);
  border: 1.5px solid transparent;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  outline: none;
  resize: vertical;
}
.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--c-text-quaternary);
}
.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
  background: var(--c-bg-hover);
  border-color: var(--c-border-light);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--c-primary);
  background: var(--c-white);
  box-shadow:
    0 0 0 4px rgba(37, 99, 235, 0.08),
    0 2px 8px rgba(37, 99, 235, 0.06);
  transform: translateY(-1px);
}
.form-field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 42px;
  cursor: pointer;
}
.form-field textarea {
  min-height: 110px;
  line-height: 1.7;
  border-radius: 14px;
}
.checkbox-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 4px 0;
}
.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  background: var(--c-bg-subtle);
  border: 1.5px solid var(--c-border-light);
  border-radius: 22px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text-secondary);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}
.checkbox:hover {
  border-color: var(--c-border-strong);
  background: var(--c-white);
  transform: translateY(-1px);
}
.checkbox input {
  accent-color: var(--c-primary);
  width: 15px;
  height: 15px;
  cursor: pointer;
}
.checkbox:has(input:checked) {
  border-color: var(--c-primary);
  background: rgba(37, 99, 235, 0.06);
  color: var(--c-primary);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.12);
}
.contact-form .btn-block {
  margin-top: 6px;
  padding: 15px 24px;
  font-size: 15px;
  letter-spacing: 0.02em;
}
.form-tip {
  font-size: 11.5px;
  color: var(--c-text-quaternary);
  text-align: center;
  margin-top: 4px;
  line-height: 1.6;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.form-tip::before {
  content: '';
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z'%3E%3C/path%3E%3C/svg%3E") no-repeat center;
  background-size: contain;
}

/* ============ 页脚 ============ */
.footer {
  background: #0F172A;
  color: rgba(255, 255, 255, 0.55);
  padding: var(--space-16) 0 var(--space-7);
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
  opacity: 0.5;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo-text strong { color: var(--c-white); }
.footer-brand .logo-text em { color: var(--c-secondary-light); }
.footer-slogan {
  font-size: 13.5px;
  line-height: 1.9;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.55);
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-white);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--c-secondary);
  border-radius: 2px;
}
.footer-col a,
.footer-col p {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.6;
  margin-bottom: 2px;
  transition: color var(--transition);
}

.footer-phone-line a {
  display: block;
  line-height: 1.4;
  margin-bottom: 0;
}
.footer-col a:hover { color: var(--c-secondary-light); }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--c-secondary-light); }
.footer-links .divider { color: rgba(255, 255, 255, 0.15); }
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  line-height: 2;
}

/* ============ 返回顶部 ============ */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: var(--c-white);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 900;
  box-shadow:
    0 6px 16px rgba(37, 99, 235, 0.3),
    0 2px 5px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover {
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 100%);
  transform: translateY(-4px) scale(1.05);
  box-shadow:
    0 10px 24px rgba(37, 99, 235, 0.38),
    0 3px 8px rgba(0, 0, 0, 0.1);
}

/* ============ 弹窗 ============ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}
.modal.show { opacity: 1; visibility: visible; }
.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(14, 74, 94, 0.6);
  backdrop-filter: blur(6px);
}
.modal-box {
  position: relative;
  background: var(--c-white);
  border-radius: var(--radius-lg);
  padding: 40px 36px 32px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  transform: scale(0.92);
  transition: transform var(--transition);
  box-shadow: var(--shadow-lg);
}
.modal.show .modal-box { transform: scale(1); }
.modal-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  background: rgba(100, 116, 139, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-box h4 {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 10px;
}
.modal-box p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

/* ============ 滚动入场动画 ============ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
  .nav-menu { gap: 0; }
  .nav-link { padding: 8px 10px; font-size: 14px; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .service-items { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .process-flow { grid-template-columns: repeat(2, 1fr); }
  .process-flow::before,
  .process-flow::after { display: none; }
  .env-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  body { font-size: 14.5px; }

  /* 移动端汉堡菜单 */
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--c-white);
    padding: 16px 20px 24px;
    gap: 4px;
    align-items: stretch;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--c-border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link {
    padding: 14px 16px;
    font-size: 15px;
    border-bottom: 1px solid var(--c-bg-lighter);
    border-radius: 0;
  }
  .nav-link::after { display: none; }
  .nav-link.active { background: var(--c-bg-lighter); }
  .hamburger { display: flex; }

  /* Hero */
  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero-globe { right: -200px; width: 520px; height: 520px; opacity: 0.4; }
  .hero-logo-watermark { width: 360px; height: 360px; left: -40px; bottom: -20px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 18px; padding: 22px; }
  .stat strong { font-size: 24px; }
  .hero-actions { gap: 12px; }
  .btn { padding: 12px 22px; font-size: 14px; flex: 1; min-width: 140px; }

  /* 通用 section */
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 40px; }

  /* About */
  .company-meta { grid-template-columns: 1fr; padding: 18px; }
  .advantages { padding: 32px 20px; border-radius: var(--radius-md); }
  .adv-grid { grid-template-columns: 1fr; gap: 16px; }
  .adv-card { padding: 24px 20px; }

  /* Services */
  .service-block { padding: 24px 20px; border-radius: var(--radius-md); }
  .service-block-head { flex-direction: column; gap: 14px; }
  .service-block-num { width: 52px; height: 52px; font-size: 18px; }
  .service-platforms { padding: 16px; }
  .service-items { grid-template-columns: 1fr; }

  /* Cases */
  .cases-grid { grid-template-columns: 1fr; }
  .case-metrics { grid-template-columns: repeat(3, 1fr); padding: 12px; }
  .case-metrics strong { font-size: 17px; }

  /* Process */
  .process-flow { grid-template-columns: 1fr; gap: 28px; }
  .process-flow::before,
  .process-flow::after { display: none; }
  .process-step { padding: 32px 22px 28px; }
  .ps-num { width: 38px; height: 38px; font-size: 12px; top: -18px; }
  .ps-icon { width: 56px; height: 56px; margin: 6px auto 16px; }
  .ps-icon svg { width: 24px; height: 24px; }

  /* Qualification */
  .qual-grid { grid-template-columns: 1fr; gap: 32px; }
  .team-grid { grid-template-columns: 1fr; }
  .env-grid { grid-template-columns: 1fr 1fr; }
  .vi-row { grid-template-columns: 1fr; gap: 24px; padding: 24px; }
  .vi-color { grid-template-columns: repeat(5, 1fr); gap: 8px; }
  .vi-swatch { padding: 8px 4px; }
  .vs-name { font-size: 11px; }
  .vs-code { font-size: 9.5px; }

  /* News */
  .news-grid { grid-template-columns: 1fr; }
  .news-tabs { gap: 6px; }
  .news-tab { padding: 7px 16px; font-size: 13px; }

  /* Contact */
  .contact-form-wrap { padding: 28px 20px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap h3 { font-size: 20px; }
  .form-sub { margin-bottom: 24px; }
  .checkbox { padding: 8px 14px; font-size: 12.5px; }
  .qr-card { flex-direction: column; text-align: center; }

  /* Footer */
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-links { gap: 8px; }
  .footer-bottom { font-size: 11.5px; }

  .back-top { right: 18px; bottom: 18px; width: 42px; height: 42px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 36px; letter-spacing: 1px; gap: 6px; }
  .hero-tag { font-size: 11.5px; padding: 5px 14px; }
  .section-title { font-size: 24px; }
  .env-grid { grid-template-columns: 1fr; }
  .vi-color { grid-template-columns: repeat(3, 1fr); }
  .case-metrics { grid-template-columns: 1fr 1fr; gap: 12px; }
  .case-metrics div:last-child { grid-column: span 2; }
}

/* ============ 打印优化 ============ */
@media print {
  .header, .back-top, .scroll-cue, .hero-bg, .modal { display: none !important; }
  .hero { min-height: auto; padding: 40px 0; background: var(--c-primary); }
}

/* ============ 可访问性 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

:focus-visible {
  outline: 2px solid var(--c-secondary);
  outline-offset: 2px;
}