/* ============================================
   第二曲线研究室 - 官网样式 (CMS 暗黑科技风)
   与 SCI OS H5 视觉统一
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  /* 背景色 */
  --bg-primary: #02040a;
  --bg-secondary: #060b18;
  --bg-card: rgba(15, 25, 48, 0.65);
  --bg-card-hover: rgba(20, 32, 60, 0.78);
  --bg-input: rgba(12, 20, 38, 0.8);

  /* 强调色 */
  --accent-blue: #2563EB;
  --accent-blue-light: #3B82F6;
  --accent-cyan: #06B6D4;
  --accent-cyan-light: #22D3EE;
  --accent-gold: #f59e0b;
  --accent-gold-light: #fbbf24;
  --accent-gold-dark: #d97706;

  /* 文字色 */
  --text-primary: #ffffff;
  --text-secondary: #8896ab;
  --text-muted: #5e6a7e;
  --text-dim: #3d485a;

  /* 边框 */
  --border-card: rgba(55, 85, 140, 0.3);
  --border-card-hover: rgba(70, 110, 180, 0.45);
  --border-gold: rgba(245, 158, 11, 0.35);
  --border-input: rgba(60, 90, 140, 0.4);

  /* 渐变 */
  --gradient-accent: linear-gradient(135deg, #2563EB 0%, #0891b2 100%);
  --gradient-accent-hover: linear-gradient(135deg, #3B82F6 0%, #06B6D4 100%);
  --gradient-gold: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
  --gradient-gold-hover: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 55%),
                   radial-gradient(ellipse at 80% 30%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
                   linear-gradient(180deg, #040b18 0%, #02040a 100%);
  --gradient-page-hero: radial-gradient(ellipse at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
                        linear-gradient(180deg, #061020 0%, #02040a 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.16) 0%, transparent 65%);
  --gradient-card-shine: linear-gradient(135deg, rgba(255,255,255,0.04) 0%, transparent 50%, rgba(37,99,235,0.04) 100%);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  /* 阴影与光晕 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 8px 28px rgba(0,0,0,0.45);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.55);
  --shadow-glow-blue: 0 0 32px rgba(37, 99, 235, 0.2);
  --shadow-glow-gold: 0 0 32px rgba(245, 158, 11, 0.16);
  --shadow-card-inner: inset 0 1px 0 rgba(255,255,255,0.04);
  --shadow-card-raised: 0 8px 32px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);

  /* 过渡 */
  --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);

  /* 布局 */
  --container-width: 1320px;
  --nav-height: 72px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 17px; }
body {
  font-family: var(--font-sans);
  color: var(--text-secondary);
  background: var(--bg-primary);
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
::selection { background: rgba(37, 99, 235, 0.35); color: #fff; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-card); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-blue); }

/* ---------- Utilities ---------- */
.text-gradient {
  background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.text-gradient-gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-8 { margin-top: 2rem; }

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
  box-shadow: var(--shadow-card-inner);
}
.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-card-raised);
  transform: translateY(-3px);
}

.glow-border {
  position: relative;
}
.glow-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(55,110,185,0.35), rgba(6,182,212,0.15), transparent 55%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.65;
}

/* ---------- SVG Icon Base ---------- */
.icon, .card-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}
.icon svg { width: 100%; height: 100%; }

/* ---------- Container ---------- */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 32px; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height);
  background: rgba(3, 6, 14, 0.82);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(55, 85, 140, 0.15);
  z-index: 1000; transition: all 0.3s ease;
}
.navbar.scrolled {
  background: rgba(3, 6, 14, 0.94);
  border-bottom-color: rgba(55, 85, 140, 0.3);
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}
.nav-inner { max-width: var(--container-width); margin: 0 auto; padding: 0 32px; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 1.1rem; color: #fff; }
.nav-logo-img {
  height: 38px; width: auto; display: block;
  filter: drop-shadow(0 2px 10px rgba(37,99,235,0.3));
  transition: var(--transition);
}
.nav-logo:hover .nav-logo-img { transform: scale(1.02); filter: drop-shadow(0 4px 14px rgba(37,99,235,0.5)); }
.nav-menu { display: flex; align-items: center; gap: 40px; }
.nav-menu a { font-size: 0.98rem; color: rgba(255,255,255,0.6); font-weight: 500; position: relative; transition: color 0.25s ease; }
.nav-menu a:hover, .nav-menu a.active { color: #fff; }
.nav-menu a::after {
  content: ''; position: absolute; bottom: -6px; left: 0; right: 0; height: 2px;
  background: var(--gradient-accent); border-radius: 2px;
  opacity: 0; transform: scaleX(0.6);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.nav-menu a:hover::after { opacity: 0.35; transform: scaleX(1); }
.nav-menu a.active::after {
  opacity: 1; transform: scaleX(1);
  box-shadow: 0 0 6px rgba(34,211,238,0.3);
}
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 24px; border-radius: 10px;
  background: var(--gradient-accent); color: #fff !important; font-size: 0.92rem; font-weight: 600;
  box-shadow: 0 2px 12px rgba(37,99,235,0.3), inset 0 1px 0 rgba(255,255,255,0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(37,99,235,0.45), inset 0 1px 0 rgba(255,255,255,0.15); }
.nav-toggle { display: none; font-size: 1.5rem; color: #fff; background: none; border: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-top: var(--nav-height);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 65% 20%, rgba(37,99,235,0.1) 0%, transparent 35%),
    radial-gradient(circle at 25% 55%, rgba(6,182,212,0.06) 0%, transparent 30%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 35%;
  background: linear-gradient(to top, rgba(2,4,10,0.98), transparent);
  pointer-events: none;
}
.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.hero-road {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 140%;
  max-width: 1800px;
  height: 70%;
  opacity: 0.9;
}
.hero-road svg { width: 100%; height: 100%; }
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}
.hero-particles::before,
.hero-particles::after {
  content: '';
  position: absolute;
  width: 2px; height: 2px;
  border-radius: 50%;
  background: rgba(255,255,255,0.6);
  box-shadow:
    10vw 15vh 0 rgba(255,255,255,0.4),
    25vw 8vh 0 rgba(255,255,255,0.3),
    40vw 22vh 0 rgba(255,255,255,0.5),
    55vw 12vh 0 rgba(255,255,255,0.35),
    70vw 28vh 0 rgba(255,255,255,0.45),
    85vw 10vh 0 rgba(255,255,255,0.3),
    95vw 25vh 0 rgba(255,255,255,0.5),
    5vw 35vh 0 rgba(255,255,255,0.25),
    60vw 5vh 0 rgba(255,255,255,0.4);
  animation: twinkle 6s ease-in-out infinite alternate;
}
.hero-particles::after {
  animation-delay: 3s;
  opacity: 0.5;
}
@keyframes twinkle {
  0% { opacity: 0.4; }
  100% { opacity: 0.9; }
}
.hero-inner {
  position: relative; z-index: 2;
  padding: 32px 0 56px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 0.75fr;
  gap: 88px;
  align-items: center;
}
.hero-content { position: relative; z-index: 2; max-width: 760px; }

/* 第二曲线渐变光效 - 融合左右区域 */
.hero-curve-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.75;
}
.hero-curve-glow svg {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.hero-headline-wide {
  max-width: 720px;
}
.hero-headline-wide span { display: inline; }
.hero-headline-wide span:first-child { color: rgba(255,255,255,0.92); margin-right: 0.15em; }
.hero-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-brand-logo { display: flex; align-items: center; justify-content: center; }
.hero-logo-img {
  height: 90px; width: auto; display: block;
  filter: drop-shadow(0 4px 24px rgba(37,99,235,0.35));
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.6rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.12;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}
.hero h1 span:first-child { color: rgba(255,255,255,0.92); }
.hero h1 .gradient-text { text-shadow: 0 0 40px rgba(34,211,238,0.18); }
.hero h1 .text-muted { color: rgba(255,255,255,0.55); }
.hero h1 .gradient-text {
  background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-subheadline {
  font-size: clamp(1.05rem, 1.85vw, 1.22rem);
  color: rgba(255,255,255,0.52);
  max-width: 580px;
  margin-bottom: 32px;
  line-height: 1.9;
  font-weight: 400;
}
.hero-subheadline br {
  display: block;
  content: "";
  margin-top: 6px;
}
.hero-cta-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 36px;
}
.hero-trust-above {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(34,211,238,0.06);
  border: 1px solid rgba(34,211,238,0.15);
}
.hero-trust-above .icon { width: 16px; height: 16px; color: var(--accent-cyan-light); }
.hero-cta-row .btn-primary {
  padding: 16px 40px;
  font-size: 1.08rem;
  font-weight: 600;
  border-radius: 10px;
  box-shadow: 0 2px 20px rgba(37,99,235,0.25), inset 0 1px 0 rgba(255,255,255,0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.hero-cta-row .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(37,99,235,0.45), inset 0 1px 0 rgba(255,255,255,0.15);
}
.hero-trust {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.38);
  font-size: 0.88rem;
  font-weight: 400;
}
.hero-trust .icon { width: 18px; height: 18px; color: var(--accent-cyan-light); }

/* Hero V5 - Minimalist */
.hero-headline-v5 {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 32px;
  line-height: 1.05;
}
.hero-headline-v5 .hero-line-1 {
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 800;
  font-style: italic;
  color: rgba(255,255,255,0.9);
  letter-spacing: -0.02em;
}
.hero-headline-v5 .hero-line-2 {
  font-size: clamp(2.8rem, 5.5vw, 4.6rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-headline-v5 .hero-line-3 {
  font-size: clamp(1.2rem, 2.2vw, 1.7rem);
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  margin-top: 14px;
  letter-spacing: -0.01em;
}
.hero-stats {
  display: flex;
  align-items: flex-start;
  gap: clamp(32px, 5vw, 56px);
  margin-top: 0;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.hero-stat { text-align: left; }
.hero-stat-value {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1;
  margin-bottom: 6px;
}
.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.35);
  font-weight: 400;
}

/* Hero Charts - 抽象概念图形 */
.hero-charts {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 400px;
  margin-left: auto;
}
.hero-chart {
  background: var(--bg-card);
  border: 1px solid rgba(55, 85, 140, 0.18);
  border-radius: 14px;
  box-shadow: var(--shadow-card-inner);
  overflow: hidden;
}
.hero-chart-radar { padding: 18px 18px 14px; }
.hero-chart-radar svg { width: 100%; height: auto; display: block; }
.hero-chart-health { padding: 18px 24px 22px; }
.hero-chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 16px;
}
.hero-chart-title {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.5);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.health-bars { display: flex; flex-direction: column; gap: 12px; }
.health-bar-row {
  display: grid;
  grid-template-columns: 95px 1fr;
  align-items: center;
  gap: 12px;
}
.health-bar-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
  white-space: nowrap;
  font-weight: 400;
}
.health-bar-track {
  height: 6px;
  background: rgba(255,255,255,0.05);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}
.health-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, #3B82F6 0%, #22D3EE 100%);
  position: relative;
  transition: width 1.4s ease-out;
}
/* 抽象线框模式：更淡的填充，无数值 */
.health-bar-abstract {
  opacity: 0.5;
}

/* Hero Preview Box */
.hero-preview {
  position: relative;
  z-index: 2;
  margin-top: 56px;
  background: rgba(13, 22, 42, 0.55);
  border: 1px solid rgba(51, 80, 130, 0.4);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  max-width: 620px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.05);
}
.hero-preview-title {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 22px;
}
.hero-preview-title::before,
.hero-preview-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37,99,235,0.5), transparent);
}
.hero-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 18px;
}
.hero-preview-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.85);
  font-size: 0.98rem;
}
.hero-preview-item .icon {
  width: 24px; height: 24px; flex-shrink: 0;
  color: var(--accent-cyan-light);
  filter: drop-shadow(0 0 6px rgba(6,182,212,0.4));
}
.hero-preview-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: rgba(255,255,255,0.45);
  font-size: 0.88rem;
}
.hero-preview-note .icon { width: 18px; height: 18px; color: var(--accent-blue-light); }

.hero-tagline-bottom {
  position: relative;
  z-index: 2;
  text-align: center;
  margin-top: 40px;
  padding-bottom: 8px;
}
.hero-tagline-bottom p {
  color: rgba(255,255,255,0.45);
  font-size: 0.9rem;
  line-height: 1.8;
}
.hero-tagline-bottom strong {
  color: rgba(255,255,255,0.75);
  font-weight: 600;
}

/* ---------- Pain Points Section ---------- */
.pain-points { background: var(--bg-secondary); position: relative; }
.pain-points::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(37,99,235,0.06) 0%, transparent 50%);
  pointer-events: none;
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.pain-card {
  display: flex;
  gap: 20px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.pain-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}
.pain-card-number {
  width: 48px; height: 48px; border-radius: 14px;
  background: var(--gradient-accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(37,99,235,0.35);
}
.pain-card h3 {
  font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 8px;
}
.pain-card p {
  font-size: 1rem; color: var(--text-secondary); line-height: 1.8;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 34px; border-radius: 10px;
  font-size: 1.02rem; font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); white-space: nowrap;
  cursor: pointer; border: none;
}
.btn-primary {
  background: var(--gradient-accent); color: #fff;
  box-shadow: 0 2px 16px rgba(37,99,235,0.3), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(37,99,235,0.45), inset 0 1px 0 rgba(255,255,255,0.15);
  background: var(--gradient-accent-hover);
}
.btn-outline {
  border: 1px solid rgba(255,255,255,0.18);
  color: rgba(255,255,255,0.8);
  background: transparent;
  border-radius: 10px;
}
.btn-outline:hover {
  border-color: rgba(55,110,185,0.6);
  background: rgba(37,99,235,0.08);
  box-shadow: 0 0 18px rgba(37,99,235,0.1);
  color: #fff;
}
.btn-dark {
  background: var(--bg-card);
  color: rgba(255,255,255,0.85);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  box-shadow: var(--shadow-card-inner);
}
.btn-dark:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  border: 1px solid var(--border-card);
  color: var(--text-secondary);
  background: transparent;
  border-radius: 10px;
}
.btn-ghost:hover {
  border-color: var(--accent-blue);
  color: #fff;
  background: rgba(37,99,235,0.06);
}
.btn-gold {
  background: var(--gradient-gold); color: #1a1000;
  box-shadow: 0 2px 16px rgba(245,158,11,0.25), inset 0 1px 0 rgba(255,255,255,0.15);
  font-weight: 700;
  border-radius: 10px;
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245,158,11,0.4), inset 0 1px 0 rgba(255,255,255,0.2);
  background: var(--gradient-gold-hover);
}
.btn-gold-outline {
  border: 1px solid rgba(245,158,11,0.4);
  color: var(--accent-gold-light);
  background: rgba(245,158,11,0.06);
  border-radius: 10px;
}
.btn-gold-outline:hover {
  border-color: var(--accent-gold-light);
  background: rgba(245,158,11,0.12);
  box-shadow: 0 0 16px rgba(245,158,11,0.1);
}

/* ---------- Sections ---------- */
section { padding: 60px 0; position: relative; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 44px; }
.eyebrow {
  display: inline-block;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.08);
  border: 1px solid rgba(55,85,140,0.3);
  color: var(--accent-cyan-light);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  margin-bottom: 16px;
}
.section-head .eyebrow { margin-bottom: 16px; }
.section-head h2 {
  font-size: clamp(1.8rem, 3.8vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-head p { font-size: 1.08rem; color: var(--text-secondary); line-height: 1.75; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 40px;
  transition: var(--transition);
  box-shadow: var(--shadow-card-inner);
}
.card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-card-raised);
}
.card-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 20px;
  background: rgba(37,99,235,0.1);
  color: var(--accent-blue-light);
}
.card-icon svg { width: 28px; height: 28px; }
.card h3 { font-size: 1.18rem; font-weight: 700; color: #fff; margin-bottom: 8px; letter-spacing: 0em; }
.card p { font-size: 0.96rem; color: var(--text-secondary); line-height: 1.75; }

/* ---------- Tier Cards ---------- */
#homeAssessmentTiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.tier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex; flex-direction: column;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.tier-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.tier-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; }
.tier-accent-blue::before { background: var(--gradient-accent); box-shadow: 0 0 16px rgba(37,99,235,0.4); }
.tier-accent-gold::before { background: var(--gradient-gold); box-shadow: 0 0 16px rgba(245,158,11,0.4); }
.tier-accent-gold {
  background: linear-gradient(180deg, rgba(245,158,11,0.08) 0%, var(--bg-card) 120px);
  border-color: var(--border-gold);
}
.tier-accent-gold:hover { border-color: rgba(245,158,11,0.55); box-shadow: var(--shadow-glow-gold); }
.tier-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 16px; }
.tier-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.25);
  color: var(--accent-cyan-light);
  font-size: 0.8rem; font-weight: 600;
  margin-bottom: 10px;
}
.tier-accent-gold .tier-badge {
  background: rgba(245,158,11,0.12);
  border-color: rgba(245,158,11,0.3);
  color: var(--accent-gold-light);
}
.tier-name { font-size: 1.45rem; font-weight: 800; color: #fff; }
.tier-price {
  font-size: 1.7rem; font-weight: 800;
  color: #fff;
}
.tier-accent-gold .tier-price {
  background: var(--gradient-gold);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.tier-description { color: var(--text-secondary); font-size: 1rem; line-height: 1.8; margin-bottom: 24px; }
.tier-features { list-style: none; margin-bottom: 32px; flex-grow: 1; }
.tier-features li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.95rem; color: rgba(255,255,255,0.85);
  margin-bottom: 14px; line-height: 1.7;
}
.tier-features li .icon { width: 18px; height: 18px; color: var(--accent-blue-light); flex-shrink: 0; margin-top: 2px; }
.tier-accent-gold .tier-features li .icon { color: var(--accent-gold-light); }
.tier-cta { width: 100%; }

/* Tier detail cards (products page) */
#productsAssessmentTiers { display: flex; flex-direction: column; gap: 36px; }
.tier-detail-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}
.tier-detail-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-card-hover);
}
.tier-detail-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; }
.tier-detail-card.tier-accent-blue::before { background: var(--gradient-accent); box-shadow: 0 0 16px rgba(37,99,235,0.4); }
.tier-detail-card.tier-accent-gold::before { background: var(--gradient-gold); box-shadow: 0 0 16px rgba(245,158,11,0.4); }
.tier-detail-card.tier-accent-gold {
  background: linear-gradient(180deg, rgba(245,158,11,0.06) 0%, var(--bg-card) 140px);
  border-color: var(--border-gold);
}
.tier-detail-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.tier-detail-card .tier-description { max-width: 720px; margin-bottom: 28px; }
.tier-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 28px; }
.tier-detail-block {
  background: rgba(6, 12, 26, 0.6);
  border: 1px solid rgba(51, 80, 130, 0.25);
  border-radius: var(--radius-md);
  padding: 24px;
}
.tier-detail-block h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 14px; }
.tier-detail-block ul { list-style: none; }
.tier-detail-block ul li {
  position: relative; padding-left: 18px;
  font-size: 0.9rem; color: var(--text-secondary);
  margin-bottom: 10px; line-height: 1.6;
}
.tier-detail-block ul li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-blue-light);
  box-shadow: 0 0 8px rgba(37,99,235,0.5);
}
.tier-accent-gold .tier-detail-block ul li::before { background: var(--accent-gold); box-shadow: 0 0 8px rgba(245,158,11,0.5); }

/* ---------- Grid ---------- */
.grid { display: grid; gap: 28px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-height) + 24px) 0 24px;
  background: var(--gradient-page-hero);
  overflow: hidden;
  border-bottom: 1px solid rgba(51, 80, 130, 0.2);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(37,99,235,0.08) 0%, transparent 40%),
    radial-gradient(circle at 70% 60%, rgba(6,182,212,0.05) 0%, transparent 35%);
}
.page-hero::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 50%;
  background: linear-gradient(to top, var(--bg-primary), transparent);
}
.page-hero-inner { position: relative; z-index: 2; text-align: center; width: 100%; }
.page-hero h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 800; color: #fff; margin-bottom: 16px; letter-spacing: -0.02em; max-width: 900px; margin-left: auto; margin-right: auto; }
.page-hero p { font-size: 1.12rem; color: rgba(255,255,255,0.52); max-width: 680px; margin: 0 auto; line-height: 1.7; }

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 80px 0 36px;
  border-top: 1px solid rgba(51, 80, 130, 0.25);
  position: relative;
}
.footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37,99,235,0.4), transparent);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 56px; margin-bottom: 56px; }
.footer-brand .logo-line { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.footer-logo-img {
  height: 46px; width: auto; display: block;
  filter: drop-shadow(0 2px 10px rgba(37,99,235,0.25));
}
.footer-brand .logo-line span { color: #fff; font-weight: 700; font-size: 1.1rem; }
.footer-brand p { font-size: 0.92rem; line-height: 1.8; max-width: 320px; color: var(--text-muted); }
.footer-col h4 { color: #fff; font-size: 0.98rem; font-weight: 600; margin-bottom: 20px; letter-spacing: 0.02em; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 0.92rem; color: var(--text-muted); }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom { padding-top: 36px; border-top: 1px solid rgba(51, 80, 130, 0.25); display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.88rem; color: var(--text-muted); }
.footer-beian { color: var(--text-muted); text-decoration: none; transition: color 0.2s ease; }
.footer-beian:hover { color: rgba(255,255,255,0.6); }
.footer-beian-divider { color: rgba(255,255,255,0.12); user-select: none; }

/* ---------- Forms ---------- */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-size: 0.9rem; font-weight: 600;
  color: #fff; margin-bottom: 8px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%; padding: 12px 16px;
  border: 1.5px solid var(--border-input);
  border-radius: var(--radius-sm);
  font-size: 0.95rem; font-family: inherit;
  background: var(--bg-input);
  color: #fff;
  transition: var(--transition);
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-muted); }
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}
.form-select option { background: var(--bg-secondary); color: #fff; }
.form-textarea { resize: vertical; }
.form-submit {
  width: 100%; padding: 14px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent); color: #fff;
  font-size: 1rem; font-weight: 600;
  box-shadow: 0 4px 20px rgba(37,99,235,0.3);
  transition: var(--transition);
}
.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37,99,235,0.5);
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-card-hover); }
.faq-item h3 { font-size: 1.05rem; color: #fff; margin-bottom: 8px; }
.faq-item p { color: var(--text-secondary); }

/* ---------- Roadmap ---------- */
.roadmap-line {
  position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(to bottom, var(--accent-blue), var(--accent-cyan), var(--border-card));
}
.roadmap-item { position: relative; padding-bottom: 36px; }
.roadmap-dot {
  position: absolute; left: -31px; top: 4px;
  width: 16px; height: 16px; border-radius: 50%;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px currentColor;
}
.roadmap-item h4 { color: #fff; font-size: 1.05rem; margin-bottom: 4px; }
.roadmap-item p { color: var(--text-secondary); font-size: 0.92rem; }

/* ---------- Animations ---------- */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(37,99,235,0.2); }
  50% { box-shadow: 0 0 40px rgba(37,99,235,0.4); }
}
.animate-pulse { animation: pulse-glow 3s ease-in-out infinite; }

/* ---------- Backgrounds ---------- */
.bg-alt { background: var(--bg-secondary); }
.bg-alt::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 50%, rgba(37,99,235,0.05) 0%, transparent 50%);
  pointer-events: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 968px) {
  .container { padding: 0 24px; }
  .nav-inner { padding: 0 24px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  #homeAssessmentTiers { grid-template-columns: 1fr; }
  .tier-detail-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .nav-menu { display: none; }
  .nav-toggle { display: block; }
  .nav-menu.open {
    display: flex; position: absolute;
    top: var(--nav-height); left: 0; right: 0;
    background: rgba(5, 10, 20, 0.98);
    border-bottom: 1px solid var(--border-card);
    flex-direction: column; padding: 24px; gap: 20px;
  }
  .nav-menu.open a { color: rgba(255,255,255,0.75); }
  .hero-preview-grid { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .hero-logo-img { height: 70px; }
  .nav-logo-img { height: 34px; }
  .about-intro-grid { gap: 60px; }
}
@media (max-width: 640px) {
  html { font-size: 16px; }
  section { padding: 56px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-preview { padding: 24px; }
  .hero-road { width: 200%; }
  .hero-logo-img { height: 58px; }
  .nav-logo-img { height: 30px; }
  .footer-logo-img { height: 40px; }
  .tier-detail-card { padding: 32px; }
  .form-card { padding: 28px; }
  .about-intro, .about-story, .about-mission, .contact-main { padding: 56px 0; }
}

/* ---------- Hero Graphic (right side) ---------- */
.hero-graphic {
  position: relative;
  z-index: 2;
  min-height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-graphic-ring {
  position: absolute;
  width: 340px; height: 340px;
  border-radius: 50%;
  border: 1px solid rgba(37,99,235,0.18);
  box-shadow: inset 0 0 60px rgba(37,99,235,0.08), 0 0 60px rgba(37,99,235,0.06);
  animation: rotateRing 30s linear infinite;
}
.hero-graphic-ring.ring-2 {
  width: 460px; height: 460px;
  border-color: rgba(6,182,212,0.12);
  animation-direction: reverse;
  animation-duration: 45s;
}
@keyframes rotateRing {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
.hero-graphic-curve-main {
  position: relative;
  z-index: 2;
  width: 92%;
  max-width: 420px;
  height: auto;
  filter: drop-shadow(0 0 30px rgba(37,99,235,0.15));
}
.hero-graphic-cards {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}
.hero-graphic-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(13, 22, 42, 0.78);
  border: 1px solid rgba(51, 80, 130, 0.45);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(37,99,235,0.1);
  color: #fff;
  min-width: 220px;
  animation: floatCard 6s ease-in-out infinite;
  pointer-events: auto;
}
.hero-graphic-card .icon {
  width: 28px; height: 28px;
  color: var(--accent-cyan-light);
  flex-shrink: 0;
}
.hero-graphic-card strong {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 2px;
}
.hero-graphic-card span {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
}
.hero-graphic-card.card-1 { top: 6%; left: 0; animation-delay: 0s; }
.hero-graphic-card.card-2 { top: 38%; right: -5%; animation-delay: 2s; }
.hero-graphic-card.card-3 { bottom: 8%; left: 5%; animation-delay: 4s; }
@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.pulse-node {
  animation: pulseGlow 2.5s ease-in-out infinite;
}
@keyframes pulseGlow {
  0%, 100% { opacity: 0.7; r: 6; }
  50% { opacity: 1; r: 8; }
}

/* ---------- New Homepage Sections ---------- */
.section-head-wide {
  max-width: 820px;
}
.section-head-wide h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
}
.mt-10 { margin-top: 36px; }

/* Problem Section */
.problem-section { background: var(--bg-secondary); position: relative; padding: 60px 0; }
.problem-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(37,99,235,0.08) 0%, transparent 55%);
  pointer-events: none;
}
.problem-visual { position: relative; margin-top: 40px; }
.problem-line {
  position: absolute;
  top: 36px; left: 12.5%; right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(37,99,235,0.4), rgba(6,182,212,0.4), transparent);
}
.problem-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}
.problem-item {
  text-align: center;
}
.problem-icon {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: rgba(13, 22, 42, 0.8);
  border: 1px solid rgba(51, 80, 130, 0.45);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px;
  color: var(--accent-cyan-light);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35), 0 0 20px rgba(37,99,235,0.1);
}
.problem-icon .icon { width: 30px; height: 30px; }
.problem-item h3 {
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.problem-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Tiers Flow */
.tiers-section { padding: 60px 0; }
.tiers-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
}
.tiers-flow::before {
  content: ''; position: absolute;
  top: 48px; left: 16%; right: 16%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  opacity: 0.25;
  z-index: 0;
}
.tier-flow-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  z-index: 1;
  transition: var(--transition);
  text-align: center;
}
.tier-flow-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: 0 16px 48px rgba(0,0,0,0.35);
}
.tier-flow-step {
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px;
  font-size: 1.1rem; font-weight: 800;
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.35);
  color: var(--accent-cyan-light);
}
.tier-flow-card-gold .tier-flow-step {
  background: rgba(245,158,11,0.12);
  border-color: rgba(245,158,11,0.35);
  color: var(--accent-gold-light);
}
.tier-flow-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: rgba(37,99,235,0.1);
  border: 1px solid rgba(37,99,235,0.2);
  color: var(--accent-cyan-light);
  font-size: 0.78rem; font-weight: 600;
  margin-bottom: 14px;
}
.tier-flow-card-gold .tier-flow-badge {
  background: rgba(245,158,11,0.1);
  border-color: rgba(245,158,11,0.2);
  color: var(--accent-gold-light);
}
.tier-flow-card h3 {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.tier-flow-card p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.75;
  margin-bottom: 24px;
}
.tier-flow-features {
  list-style: none;
  text-align: left;
  margin-bottom: 28px;
}
.tier-flow-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 10px;
  line-height: 1.5;
}
.tier-flow-features li .icon {
  width: 18px; height: 18px;
  color: var(--accent-cyan-light);
  flex-shrink: 0;
  margin-top: 2px;
}
.tier-flow-cta {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 0.98rem;
}
.tier-flow-lock {
  display: block;
  padding: 14px;
  border-radius: var(--radius-full);
  border: 1.5px dashed rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.45);
  font-size: 0.88rem;
}
.tier-flow-card-gold .tier-flow-lock {
  border-color: rgba(245,158,11,0.25);
  color: rgba(251,191,36,0.6);
}

/* Model Diagram */
.model-section { padding: 60px 0; position: relative; }
.model-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 50%, rgba(6,182,212,0.06) 0%, transparent 50%);
  pointer-events: none;
}
.model-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 40px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}
.model-layer {
  flex: 1;
  min-width: 280px;
  max-width: 360px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.model-layer-card {
  flex: 1;
  background: rgba(13, 22, 42, 0.55);
  border: 1px solid;
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}
.model-layer-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3);
}
.model-layer-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  background: rgba(255,255,255,0.06);
}
.model-layer-icon .icon { width: 24px; height: 24px; }
.model-layer-info h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.model-layer-info p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 14px;
}
.model-indices {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.model-indices span {
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.8);
  font-size: 0.82rem;
  font-weight: 600;
}
.model-arrow {
  color: rgba(255,255,255,0.25);
  flex-shrink: 0;
}
.model-arrow .icon { width: 24px; height: 24px; }

/* Audience Grid - 我们服务谁 */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.audience-card {
  text-align: center;
  padding: 36px 28px 32px;
}
.audience-card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.12);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
  color: var(--accent-cyan-light);
}
.audience-card-icon .icon { width: 26px; height: 26px; }
.audience-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.audience-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Outcome Section */
.outcome-section { padding: 60px 0; }
.outcome-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.outcome-card {
  background: rgba(13, 22, 42, 0.55);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.outcome-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-card-hover);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.outcome-number {
  position: absolute;
  top: 16px; right: 20px;
  font-size: 0.85rem;
  font-weight: 800;
  color: rgba(255,255,255,0.15);
}
.outcome-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: rgba(37,99,235,0.12);
  color: var(--accent-cyan-light);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.outcome-icon .icon { width: 26px; height: 26px; }
.outcome-card h3 {
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
}

/* Final CTA */
.final-cta {
  background: var(--gradient-hero);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(37,99,235,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.final-cta h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}
.final-cta p {
  color: rgba(255,255,255,0.5);
  font-size: 1.08rem;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}
.final-cta .btn-primary {
  position: relative;
  z-index: 1;
  padding: 16px 42px;
  font-size: 1.08rem;
}

/* Page Hero Bilingual Subtitle */
.page-hero-subtitle-bilingual {
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
}
.page-hero-subtitle-bilingual br:first-of-type + * {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
}

/* Products Model Visual */
.products-model-section { position: relative; padding: 60px 0; }
.products-model-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 30%, rgba(37,99,235,0.06) 0%, transparent 55%);
  pointer-events: none;
}
.products-model-visual {
  margin: 48px auto 64px;
  max-width: 900px;
}
.products-model-visual svg {
  width: 100%;
  height: auto;
  display: block;
}
.tier-step-label {
  position: absolute;
  top: 14px; right: 18px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.25);
}
.tier-next-hint {
  text-align: center;
  padding: 12px;
  border-radius: var(--radius-full);
  border: 1.5px dashed rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.45);
  font-size: 0.88rem;
}
.tier-accent-gold .tier-next-hint {
  border-color: rgba(245,158,11,0.25);
  color: rgba(251,191,36,0.6);
}

/* ---------- About page ---------- */
.about-intro { padding: 60px 0; }
.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 100px;
  align-items: start;
}
.about-intro h2 {
  font-size: clamp(2rem, 3.8vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  margin: 20px 0 32px;
  line-height: 1.25;
}
.about-intro-text {
  color: var(--text-secondary);
  line-height: 2;
  display: flex;
  flex-direction: column;
  gap: 22px;
  font-size: 1.08rem;
}
.about-problems-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: sticky;
  top: 110px;
}
.about-problems-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  background: rgba(37,99,235,0.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-blue-light);
  margin-bottom: 26px;
}
.about-problems-icon .icon { width: 30px; height: 30px; }
.about-visual {
  background: rgba(13, 22, 42, 0.5);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(8px);
}
.about-visual svg {
  width: 100%;
  height: auto;
  display: block;
}
.about-problems-section { padding: 60px 0; }
.problem-items-3 {
  grid-template-columns: repeat(3, 1fr);
}
.problem-items-3 .problem-item p {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
}
.about-problems-card h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 24px;
}
.about-problems-card li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: rgba(255,255,255,0.75);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}
.about-story { padding: 60px 0; }
.about-story-body {
  max-width: 820px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 2;
}
.about-story-body p { margin-bottom: 28px; }
.about-story-body blockquote {
  border-left: 3px solid var(--accent-blue);
  padding: 28px 32px;
  margin: 36px 0;
  color: #fff;
  font-size: 1.2rem;
  line-height: 1.8;
  background: rgba(37,99,235,0.08);
  border-radius: 0 16px 16px 0;
}
.about-mission { padding: 60px 0; }

/* ---------- Contact page ---------- */
.contact-main {
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

/* 第二曲线渐变光效 */
.contact-curve-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}
.contact-curve-glow svg {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

/* 三栏卡片容器 */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
}

/* 单张卡片 */
.contact-card {
  background: var(--bg-card);
  border: 1px solid rgba(55, 85, 140, 0.18);
  border-radius: 16px;
  padding: 40px 32px 36px;
  text-align: center;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card-inner);
}
.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(37, 99, 235, 0.05), transparent 60%);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-card-raised);
}
.contact-card:hover::before {
  opacity: 1;
}

/* 卡片图标 */
.contact-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--accent-cyan-light);
}
.contact-card-icon .icon {
  width: 26px;
  height: 26px;
}

/* 卡片标题 */
.contact-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: 0.01em;
}

/* 联系信息列表 */
.contact-card-info {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-card-info li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.contact-card-label {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.35);
  font-weight: 500;
  letter-spacing: 0.03em;
}
.contact-card-value {
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.6;
}

/* 二维码区域 */
.contact-card-qrcode {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  display: inline-block;
  margin-bottom: 16px;
}
.contact-card-qrcode img {
  width: 160px;
  height: 160px;
  object-fit: contain;
  display: block;
}

/* 卡片底部说明文字 */
.contact-card-tip {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.6;
  max-width: 200px;
  margin: 0 auto;
}

/* ---------- Footer ICP ---------- */
.footer-bottom {
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  text-align: center;
}

/* ---------- Additional animations ---------- */
@keyframes dataPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.6); opacity: 0; }
}

/* ---------- Responsive additions ---------- */
@media (max-width: 968px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 56px; }
  .hero-content { max-width: 720px; margin: 0 auto; }
  .hero-headline-v5 { align-items: center; }
  .hero-subheadline { margin-left: auto; margin-right: auto; }
  .hero-cta-row { align-items: center; }
  .hero-trust-above { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-charts { margin: 0 auto; max-width: 400px; width: 100%; }
  .hero-curve-glow { display: none; }
  .problem-items { grid-template-columns: repeat(2, 1fr); }
  .problem-line { display: none; }
  .tiers-flow { grid-template-columns: 1fr; }
  .tiers-flow::before { display: none; }
  .model-diagram { flex-direction: column; }
  .model-arrow { transform: rotate(90deg); }
  .outcome-grid { grid-template-columns: repeat(2, 1fr); }
  .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .about-intro-grid { grid-template-columns: 1fr; gap: 56px; }
  .about-problems-card { position: static; }
  .contact-cards { grid-template-columns: 1fr; gap: 28px; max-width: 480px; }
}
@media (max-width: 640px) {
  .problem-items { grid-template-columns: 1fr; }
  .outcome-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .model-layer { min-width: 100%; }
  .about-intro, .about-story, .about-mission, .contact-main { padding: 56px 0; }
  .about-problems-card { padding: 32px; }
  .contact-card { padding: 32px 24px 28px; }
  .contact-card-qrcode img { width: 130px; height: 130px; }
  .hero-stats { gap: 32px; }
  .health-bar-row { grid-template-columns: 85px 1fr; gap: 10px; }
  .health-bar-label { font-size: 0.82rem; }
  .hero-chart-score { font-size: 1.4rem; }
}