/* ============================================================
   爱果儿装饰 · 品牌设计系统 v3
   VI 色彩系统：品牌黑 #1A1A1A + 品牌绿 #52E397 + 白
   色彩比例：60% 黑 / 30% 白 / 10% 绿
   ============================================================ */

/* ===== Tokens ===== */
:root {
  /* Brand Colors - VI System */
  --green: #52E397;
  --green-dark: #3BC47A;
  --green-light: #8FF0BC;
  --green-pale: #E6FBF0;
  --green-mist: #F8FAF9;
  --black: #1A1A1A;
  --dark: #2D2D2D;
  --gray: #6B6B6B;
  --gray-light: #B0B0B0;
  --gray-pale: #E8E8E8;
  --white: #FFFFFF;

  /* Semantic */
  --bg: #FFFFFF;
  --bg-alt: var(--green-mist);
  --ink: var(--black);
  --ink-2: var(--dark);
  --ink-3: var(--gray);
  --ink-4: var(--gray-light);
  --accent: var(--green);
  --accent-dark: var(--green-dark);
  --accent-pale: var(--green-pale);
  --surface: var(--white);
  --line: #EEEEEE;
  --line-2: #F0F0F0;

  /* Typography */
  --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en: 'Inter', 'Arial', sans-serif;
  --container: 1200px;

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --space-3xl: 128px;

  /* Radius */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-full: 999px;

  /* Shadow */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
  --shadow-green: 0 8px 30px rgba(82,227,151,0.25);

  /* Transitions */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 0.2s var(--ease);
  --t: 0.4s var(--ease);
  --t-slow: 0.7s var(--ease);
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-cn);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }
section { position: relative; }

/* ===== Scroll Progress ===== */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green), var(--green-dark));
  z-index: 9999;
  width: 0;
  transition: width 0.1s linear;
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--black); color: var(--white);
  padding: 8px 16px; z-index: 10000;
  transition: top var(--t-fast);
}
.skip-link:focus { top: 0; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Section ===== */
.section { padding: var(--space-3xl) 0; }
.section--tight { padding: var(--space-2xl) 0; }
.section--dark { background: var(--black); color: var(--white); }
.section--alt { background: var(--green-mist); }
.section--pale { background: var(--green-pale); }

/* ===== Section Header ===== */
.sec-head { text-align: center; max-width: 680px; margin: 0 auto var(--space-xl); }
.sec-head--left { text-align: left; margin-left: 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-en);
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--green-dark);
  padding: 6px 16px;
  background: var(--green-pale);
  border-radius: var(--r-full);
  margin-bottom: var(--space-md);
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px;
  background: var(--green); border-radius: 50%;
}
.sec-title {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.sec-sub {
  margin-top: var(--space-sm);
  color: var(--ink-3);
  font-size: 1rem;
  line-height: 1.8;
}

/* ===== Button ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px;
  font-size: 0.95rem; font-weight: 700;
  border-radius: var(--r-full);
  transition: all var(--t);
  position: relative; overflow: hidden;
  white-space: nowrap;
}
.btn--primary {
  background: var(--green);
  color: var(--black);
  box-shadow: var(--shadow-green);
}
.btn--primary:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(82,227,151,0.4);
}
.btn--dark {
  background: var(--black);
  color: var(--white);
}
.btn--dark:hover {
  background: var(--dark);
  transform: translateY(-2px);
}
.btn--accent {
  background: var(--green);
  color: var(--black);
  box-shadow: var(--shadow-green);
}
.btn--accent:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(82,227,151,0.4);
}
.btn--outline {
  border: 2px solid var(--line);
  color: var(--ink);
  background: transparent;
}
.btn--outline:hover {
  border-color: var(--green);
  color: var(--green-dark);
  background: var(--green-pale);
}
.btn--ghost {
  color: var(--ink-3);
  padding: 10px 20px;
}
.btn--ghost:hover { color: var(--green-dark); }
.btn--sm { padding: 10px 20px; font-size: 0.85rem; }
.btn--lg { padding: 18px 40px; font-size: 1.05rem; }
.btn svg { width: 18px; height: 18px; }

/* Magnetic button shine effect */
.btn--primary::before, .btn--accent::before {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s var(--ease);
}
.btn--primary:hover::before, .btn--accent:hover::before {
  left: 100%;
}

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 14px 0;
  transition: all var(--t);
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid #e8e8e8;
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}
.nav.scrolled {
  padding: 10px 0;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.nav-inner {
  width: 100%; max-width: var(--container);
  margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px;
}

/* Brand */
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 900; font-size: 1.1rem;
  color: var(--black);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: color var(--t);
}
.brand-mark {
  width: auto;
  height: 36px;
  display: block;
  transition: all var(--t);
  object-fit: contain;
}
.brand:hover .brand-mark {
  transform: rotate(-5deg) scale(1.05);
}
.brand-sub {
  display: block;
  font-size: 0.65rem; font-weight: 500;
  color: var(--gray);
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* Nav menu */
.nav-menu {
  display: flex; gap: 4px;
  align-items: center;
}
.nav-menu a {
  padding: 8px 16px;
  font-size: 0.9rem; font-weight: 500;
  color: var(--ink-2);
  border-radius: var(--r-full);
  transition: all var(--t-fast);
  position: relative;
}
.nav-menu a:hover {
  color: var(--green-dark);
  background: var(--green-pale);
}
.nav-menu a.active {
  color: var(--green-dark);
}
.nav-menu a.active::after {
  content: ''; position: absolute; bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 4px;
  background: var(--green); border-radius: 50%;
}

/* 外部跳转链接（案例资讯站）：视觉上一眼看出是站外跳转 */
.nav-menu a.nav-ext {
  color: var(--green-dark);
  background: var(--green-pale);
  margin-left: 4px;
}
.nav-menu a.nav-ext:hover {
  background: var(--green);
  color: var(--black);
}

/* Nav dropdown (FAQ pages) */
.nav-dropdown {
  position: relative;
}
.nav-dropdown > a {
  padding: 8px 16px;
  font-size: 0.9rem; font-weight: 500;
  color: var(--ink-2);
  border-radius: var(--r-full);
  transition: all var(--t-fast);
  cursor: pointer;
}
.nav-dropdown:hover > a {
  color: var(--green-dark);
  background: var(--green-pale);
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%; left: 0;
  min-width: 160px;
  background: #fff;
  border: 1px solid #e8e8e8;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-md);
  padding: 8px 0;
  z-index: 100;
}
.nav-dropdown:hover .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-menu a {
  display: block;
  padding: 8px 20px;
  font-size: 0.85rem; font-weight: 500;
  color: var(--ink-2);
  transition: all var(--t-fast);
}
.nav-dropdown-menu a:hover {
  color: var(--green-dark);
  background: var(--green-pale);
}

/* Nav right */
.nav-right {
  display: flex; align-items: center; gap: 16px;
}
.nav-phone {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 0.95rem;
  color: var(--black);
  transition: color var(--t-fast);
}
.nav-phone:hover { color: var(--green-dark); }
.nav-phone svg { width: 18px; height: 18px; }

/* Nav CTA button (FAQ pages) */
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 20px;
  font-weight: 700; font-size: 0.9rem;
  color: #fff;
  background: var(--green);
  border-radius: var(--r-full);
  transition: all var(--t-fast);
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--green-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-green);
}

/* Nav toggle (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--black);
  border-radius: 2px;
  transition: all var(--t);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Nav overlay (mobile) */
.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(26,26,26,0.95);
  backdrop-filter: blur(20px);
  z-index: 999;
  opacity: 0; pointer-events: none;
  transition: opacity var(--t);
}
.nav-overlay.active {
  opacity: 1; pointer-events: auto;
}
.nav-overlay-menu {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  display: flex; flex-direction: column; gap: 8px;
  text-align: center;
}
.nav-overlay-menu a {
  font-size: 1.5rem; font-weight: 700;
  color: var(--white);
  padding: 12px 32px;
  transition: color var(--t-fast);
}
.nav-overlay-menu a:hover { color: var(--green); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  background: var(--black);
  color: var(--white);
  display: flex; align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}
/* Dot pattern background */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(82,227,151,0.12) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.6;
}
/* Glow effect */
.hero::after {
  content: '';
  position: absolute;
  top: 20%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(82,227,151,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px;
  background: rgba(82,227,151,0.1);
  border: 1px solid rgba(82,227,151,0.3);
  border-radius: var(--r-full);
  font-size: 0.8rem; font-weight: 600;
  color: var(--green);
  margin-bottom: var(--space-md);
}
.hero-badge::before {
  content: ''; width: 8px; height: 8px;
  background: var(--green); border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}
.hero h1 .accent { color: var(--green); }
.hero-lead {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.6);
  max-width: 580px;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}
.hero-cta {
  display: flex; gap: 16px; flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
}
.hero-stat {
  padding: 0 24px;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.hero-stat:first-child { padding-left: 0; }
.hero-stat:last-child { border-right: none; padding-right: 0; }
.hero-stat .num {
  font-family: var(--font-en);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 900;
  color: var(--green);
  line-height: 1;
}
.hero-stat .num .suffix {
  font-size: 0.6em; font-weight: 700;
  color: var(--green-light);
}
.hero-stat .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* Scroll indicator */
.scroll-hint {
  position: absolute; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}
.scroll-hint::after {
  content: '';
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--green), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

/* ===== Marquee ===== */
.marquee {
  background: var(--black);
  border-top: 1px solid rgba(82,227,151,0.1);
  border-bottom: 1px solid rgba(82,227,151,0.1);
  padding: 20px 0;
  overflow: hidden;
}
.marquee-track {
  display: flex; gap: 48px;
  animation: marquee 30s linear infinite;
  white-space: nowrap;
}
.marquee-item {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.95rem; font-weight: 600;
  color: rgba(255,255,255,0.4);
}
.marquee-item .dot {
  width: 6px; height: 6px;
  background: var(--green); border-radius: 50%;
  flex-shrink: 0;
}

/* ===== Story ===== */
.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.story-item {
  padding: var(--space-lg);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background var(--t);
}
.story-item:nth-child(3n) { border-right: none; }
.story-item:nth-last-child(-n+3) { border-bottom: none; }
.story-item:hover {
  background: var(--green-pale);
}
.story-icon {
  width: 48px; height: 48px;
  background: var(--green-pale);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-md);
  transition: all var(--t);
}
.story-icon svg { width: 24px; height: 24px; stroke: var(--green-dark); }
.story-item:hover .story-icon {
  background: var(--green);
  transform: scale(1.05);
}
.story-item:hover .story-icon svg { stroke: var(--black); }
.story-item h3 {
  font-size: 1.15rem; font-weight: 700;
  margin-bottom: var(--space-xs);
}
.story-item p {
  color: var(--ink-3);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== Advantages ===== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}
.adv-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.adv-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--green-light);
}
.adv-card:hover::before {
  transform: scaleX(1);
}
.adv-num {
  font-family: var(--font-en);
  font-size: 2.2rem; font-weight: 900;
  color: var(--green-pale);
  line-height: 1;
  margin-bottom: var(--space-sm);
  transition: color var(--t);
}
.adv-card:hover .adv-num {
  color: var(--green);
}
.adv-card h3 {
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: var(--space-xs);
}
.adv-card p {
  color: var(--ink-3);
  font-size: 0.88rem;
  line-height: 1.7;
}

/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  counter-reset: step;
}
.process-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  position: relative;
  transition: all var(--t);
  counter-increment: step;
}
.process-item::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-en);
  font-size: 3rem; font-weight: 900;
  color: var(--green-pale);
  line-height: 1;
  position: absolute; top: 20px; right: 24px;
  transition: color var(--t);
}
.process-item:hover {
  border-color: var(--green);
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
}
.process-item:hover::before {
  color: var(--green);
}
.process-item h3 {
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: var(--space-xs);
  padding-right: 60px;
}
.process-item p {
  color: var(--ink-3);
  font-size: 0.88rem;
  line-height: 1.7;
}

/* ===== CTA Band ===== */
.cta-band {
  background: var(--black);
  color: var(--white);
  padding: var(--space-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(82,227,151,0.08) 1px, transparent 1px);
  background-size: 24px 24px;
}
.cta-band .container { position: relative; z-index: 1; }
.cta-band h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  margin-bottom: var(--space-sm);
}
.cta-band p {
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-lg);
  font-size: 1rem;
}
.cta-band .btn {
  background: var(--green);
  color: var(--black);
}
.cta-band .btn:hover {
  background: var(--green-dark);
}

/* ===== Services ===== */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.cat-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--green);
}
.cat-icon {
  width: 56px; height: 56px;
  background: var(--green-pale);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-md);
  transition: all var(--t);
}
.cat-icon svg { width: 28px; height: 28px; stroke: var(--green-dark); }
.cat-card:hover .cat-icon {
  background: var(--green);
  transform: scale(1.08);
}
.cat-card:hover .cat-icon svg { stroke: var(--black); }
.cat-card h3 {
  font-size: 1.15rem; font-weight: 700;
  margin-bottom: var(--space-xs);
}
.cat-card p {
  color: var(--ink-3);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}
.cat-card .cat-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.cat-card .cat-tags span {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--green-pale);
  color: var(--green-dark);
  border-radius: var(--r-full);
  font-weight: 500;
}

/* ===== Qualifications ===== */
.qual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.qual-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  display: flex; gap: var(--space-md);
  align-items: flex-start;
  transition: all var(--t);
}
.qual-card:hover {
  border-color: var(--green);
  box-shadow: var(--shadow-sm);
}
.qual-icon {
  width: 44px; height: 44px;
  background: var(--green-pale);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.qual-icon svg { width: 22px; height: 22px; stroke: var(--green-dark); }
.qual-card h3 {
  font-size: 1rem; font-weight: 700;
  margin-bottom: 4px;
}
.qual-card p {
  color: var(--ink-3);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  transition: all var(--t);
}
.faq-item:hover {
  border-color: var(--green-light);
}
.faq-item.active {
  border-color: var(--green);
  box-shadow: var(--shadow-sm);
}
.faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  font-size: 1rem; font-weight: 600;
  text-align: left;
  transition: color var(--t-fast);
}
.faq-q:hover { color: var(--green-dark); }
.faq-item.active .faq-q { color: var(--green-dark); }
.faq-q-icon {
  width: 28px; height: 28px;
  flex-shrink: 0; margin-left: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--t);
}
.faq-item.active .faq-q-icon {
  transform: rotate(45deg);
}
.faq-q-icon svg { width: 16px; height: 16px; stroke: var(--green-dark); }
.faq-a {
  /* 默认可见：GEO优化要求答案立刻展示，不折叠 */
  max-height: none !important;
  overflow: visible !important;
  padding: 0;
}
.faq-a-inner {
  padding: 0 24px 20px;
  color: var(--ink-3);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* ===== Contact ===== */
.contact-section {
  background: var(--green-mist);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}
.contact-info .eyebrow { color: var(--green-dark); }
.contact-info h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  margin-bottom: var(--space-md);
}
.contact-info > p {
  color: var(--ink-3);
  margin-bottom: var(--space-lg);
  font-size: 1rem;
  line-height: 1.8;
}
.contact-list { margin-bottom: var(--space-lg); }
.contact-list li {
  display: flex; align-items: flex-start; gap: var(--space-sm);
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.contact-list li:last-child { border-bottom: none; }
.contact-list svg {
  width: 22px; height: 22px;
  stroke: var(--green-dark);
  flex-shrink: 0;
  margin-top: 2px;
}
.contact-list .label {
  font-size: 0.75rem;
  color: var(--ink-4);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.contact-list .value {
  font-size: 1rem; font-weight: 600;
}
.contact-list .value a {
  color: var(--ink);
  transition: color var(--t-fast);
}
.contact-list .value a:hover { color: var(--green-dark); }

/* Contact form */
.contact-form {
  background: var(--white);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.contact-form h3 {
  font-size: 1.2rem; font-weight: 700;
  margin-bottom: var(--space-md);
}
.form-group {
  margin-bottom: var(--space-md);
}
.form-group label {
  display: block;
  font-size: 0.85rem; font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink-2);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-size: 0.95rem;
  transition: all var(--t-fast);
  background: var(--bg);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(82,227,151,0.15);
}
.form-group textarea {
  resize: vertical;
  min-height: 100px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.form-hint {
  font-size: 0.8rem;
  color: var(--ink-4);
  margin-top: var(--space-sm);
}

/* ===== Footer ===== */
.footer {
  background: var(--black);
  color: rgba(255,255,255,0.6);
  padding: var(--space-2xl) 0 var(--space-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}
.footer-brand .brand {
  color: var(--white);
  margin-bottom: var(--space-md);
}
.footer-brand .brand .brand-sub { color: rgba(255,255,255,0.35); }
.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.4);
}
.footer-col h4 {
  font-size: 0.9rem; font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-md);
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
  transition: color var(--t-fast);
}
.footer-col ul li a:hover {
  color: var(--green);
}
.footer-contact li {
  display: flex; align-items: flex-start; gap: 10px;
  margin-bottom: 12px;
}
.footer-contact svg {
  width: 18px; height: 18px;
  stroke: rgba(255,255,255,0.3);
  flex-shrink: 0; margin-top: 3px;
}
.footer-contact span {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-contact a {
  color: rgba(255,255,255,0.6);
  transition: color var(--t-fast);
}
.footer-contact a:hover { color: var(--green); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-md);
  display: flex; justify-content: space-between; flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}
.footer-bottom a { color: rgba(255,255,255,0.3); }
.footer-bottom a:hover { color: var(--green); }

/* ===== Float Buttons ===== */
.float-contact {
  position: fixed;
  right: 24px; bottom: 24px;
  display: flex; flex-direction: column; gap: 12px;
  z-index: 900;
}
.float-btn {
  width: 52px; height: 52px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--t);
  position: relative;
}
.float-btn svg { width: 22px; height: 22px; }
.float-btn--phone {
  background: var(--green);
  color: var(--black);
}
.float-btn--phone:hover {
  background: var(--green-dark);
  transform: scale(1.08);
}
.float-btn--phone::before {
  content: '';
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--green);
  opacity: 0;
  animation: ripple 2s ease-out infinite;
}
.float-btn--top {
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--line);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}
.float-btn--top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.float-btn--top:hover {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}
.float-tip {
  position: absolute;
  right: calc(100% + 12px); top: 50%;
  transform: translateY(-50%);
  background: var(--black);
  color: var(--white);
  padding: 6px 14px;
  border-radius: var(--r-sm);
  font-size: 0.8rem; font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--t-fast);
}
.float-btn:hover .float-tip {
  opacity: 1;
  transform: translateY(-50%) translateX(-4px);
}
.float-tip::after {
  content: '';
  position: absolute;
  right: -4px; top: 50%;
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-left-color: var(--black);
}

/* ===== Business Page ===== */
.biz-hero {
  min-height: 70vh;
  background: var(--black);
  color: var(--white);
  display: flex; align-items: center;
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}
.biz-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(82,227,151,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
}
.biz-hero::after {
  content: '';
  position: absolute;
  top: 10%; right: -5%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(82,227,151,0.12) 0%, transparent 70%);
}
.biz-hero .container { position: relative; z-index: 1; }
.biz-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}
.biz-hero h1 .accent { color: var(--green); }
.biz-hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.5);
  max-width: 600px;
  line-height: 1.8;
}
.biz-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: var(--space-xl);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
}
.biz-stat {
  padding: 0 24px;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.biz-stat:first-child { padding-left: 0; }
.biz-stat:last-child { border-right: none; }
.biz-stat .num {
  font-family: var(--font-en);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  color: var(--green);
  line-height: 1;
}
.biz-stat .num .suffix {
  font-size: 0.6em;
  color: var(--green-light);
}
.biz-stat .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* Business category */
.biz-cat {
  margin-bottom: var(--space-lg);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--t);
}
.biz-cat:hover { border-color: var(--green-light); }
.biz-cat-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  background: var(--green-mist);
  border-bottom: 1px solid var(--line);
}
.biz-cat-head h2 {
  font-size: 1.2rem; font-weight: 700;
}
.biz-cat-count {
  font-size: 0.8rem; font-weight: 700;
  color: var(--green-dark);
  background: var(--green-pale);
  padding: 4px 12px;
  border-radius: var(--r-full);
}
.biz-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 20px 24px;
}
.biz-tag {
  font-size: 0.82rem;
  padding: 6px 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  color: var(--ink-2);
  transition: all var(--t-fast);
  cursor: default;
}
.biz-tag:hover {
  background: var(--green);
  color: var(--black);
  border-color: var(--green);
  transform: translateY(-2px);
}

/* ===== Animations ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@keyframes ripple {
  0% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.5); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-d2 { transition-delay: 0.1s; }
.reveal-d3 { transition-delay: 0.2s; }
.reveal-d4 { transition-delay: 0.3s; }
.reveal-d5 { transition-delay: 0.4s; }
.reveal-d6 { transition-delay: 0.5s; }

/* Scale reveal */
.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Left reveal */
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Right reveal */
.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .section { padding: var(--space-2xl) 0; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: repeat(2, 1fr); }
  .story-item:nth-child(3n) { border-right: 1px solid var(--line); }
  .story-item:nth-child(2n) { border-right: none; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
  .footer-brand { grid-column: 1 / -1; }
  .biz-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .biz-stat { border-right: none; padding: 0; }
  .biz-stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.1); padding-right: 24px; }
  .biz-stat:nth-child(even) { padding-left: 24px; }
}

@media (max-width: 768px) {
  .section { padding: var(--space-xl) 0; }
  .nav-menu, .nav-right { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 100px 0 60px; min-height: 90vh; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 20px; }
  .hero-stat { border-right: none; padding: 0; }
  .hero-stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.1); padding-right: 16px; }
  .hero-stat:nth-child(even) { padding-left: 16px; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .story-grid { grid-template-columns: 1fr; }
  .story-item { border-right: none !important; border-bottom: 1px solid var(--line); }
  .story-item:last-child { border-bottom: none; }
  .adv-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr; }
  .qual-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .biz-stats { grid-template-columns: 1fr 1fr; }
  .biz-stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.1); padding-right: 16px; }
  .biz-stat:nth-child(even) { padding-left: 16px; }
  .biz-cat-head { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .hero-stat { border-right: none !important; padding: 0 !important; }
  .biz-stats { grid-template-columns: 1fr; }
  .biz-stat { border-right: none !important; padding: 0 !important; }
  .float-contact { right: 16px; bottom: 16px; }
  .float-btn { width: 46px; height: 46px; }
}

/* ============================================================
   v4 新增组件 — 子页面通用 + 培训页 + 材料页 + 投资页 + 问答页
   ============================================================ */

/* ===== Page Hero (子页面通用) ===== */
.page-hero {
  min-height: 50vh;
  background: var(--black);
  color: var(--white);
  display: flex; align-items: center;
  padding: 120px 0 60px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(82,227,151,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
}
.page-hero::after {
  content: '';
  position: absolute;
  top: 10%; right: -5%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(82,227,151,0.12) 0%, transparent 70%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}
.page-hero h1 .accent { color: var(--green); }
.page-hero .lead {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.5);
  max-width: 600px;
  line-height: 1.8;
}
.page-hero .eyebrow {
  margin-bottom: var(--space-md);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem;
  color: var(--ink-4);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--ink-3);
  transition: color var(--t-fast);
}
.breadcrumb a:hover { color: var(--green-dark); }
.breadcrumb span.sep { color: var(--ink-4); }
.breadcrumb span.current { color: var(--ink); font-weight: 600; }

/* ===== Stats Bar (通用统计) ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  margin-top: var(--space-xl);
}
.stats-bar .stat {
  padding: 0 24px;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.stats-bar .stat:first-child { padding-left: 0; }
.stats-bar .stat:last-child { border-right: none; padding-right: 0; }
.stats-bar .stat .num {
  font-family: var(--font-en);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  color: var(--green);
  line-height: 1;
}
.stats-bar .stat .num .suffix {
  font-size: 0.6em;
  color: var(--green-light);
}
.stats-bar .stat .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* ===== Investment Page (副业投资) ===== */
.invest-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}
.invest-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.invest-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--green);
}
.invest-card .num-badge {
  position: absolute;
  top: 20px; right: 24px;
  font-family: var(--font-en);
  font-size: 2.5rem; font-weight: 900;
  color: var(--green-pale);
  line-height: 1;
  transition: color var(--t);
}
.invest-card:hover .num-badge { color: var(--green); }
.invest-card h3 {
  font-size: 1.2rem; font-weight: 700;
  margin-bottom: var(--space-xs);
  padding-right: 80px;
}
.invest-card > p {
  color: var(--ink-3);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}
.invest-card ul {
  list-style: none;
}
.invest-card ul li {
  padding: 8px 0 8px 24px;
  font-size: 0.88rem;
  color: var(--ink-2);
  position: relative;
  border-bottom: 1px solid var(--line-2);
}
.invest-card ul li:last-child { border-bottom: none; }
.invest-card ul li::before {
  content: '';
  position: absolute; left: 0; top: 14px;
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
}

/* Direction cards */
.direction-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.direction-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-lg);
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.direction-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.direction-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.direction-card:hover::before { transform: scaleX(1); }
.direction-card .icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}
.direction-card h3 {
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: var(--space-xs);
}
.direction-card p {
  color: var(--ink-3);
  font-size: 0.88rem;
  line-height: 1.7;
}

/* ===== Training Page Layout ===== */
.train-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.train-toc {
  position: sticky;
  top: 100px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--space-md);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.train-toc h4 {
  font-size: 0.8rem; font-weight: 700;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--line);
}
.train-toc ul { list-style: none; }
.train-toc ul li { margin-bottom: 4px; }
.train-toc ul li a {
  display: block;
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--ink-3);
  border-radius: var(--r-sm);
  transition: all var(--t-fast);
  line-height: 1.5;
}
.train-toc ul li a:hover {
  background: var(--green-pale);
  color: var(--green-dark);
}
.train-toc ul li a.active {
  background: var(--green);
  color: var(--black);
  font-weight: 600;
}

/* Training content */
.train-content {
  max-width: 100%;
}
.train-chapter {
  margin-bottom: var(--space-2xl);
  scroll-margin-top: 100px;
}
.train-chapter:last-child { margin-bottom: 0; }
.train-chapter > h2 {
  font-size: 1.5rem; font-weight: 900;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--green);
  display: inline-block;
}
.train-section {
  margin-bottom: var(--space-lg);
}
.train-section > h3 {
  font-size: 1.15rem; font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--ink);
}
.train-section > h3::before {
  content: '';
  display: inline-block;
  width: 4px; height: 18px;
  background: var(--green);
  border-radius: 2px;
  margin-right: 10px;
  vertical-align: -2px;
}
.train-section > p {
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.8;
  margin-bottom: var(--space-sm);
}
.train-section ul {
  list-style: none;
  padding-left: 0;
}
.train-section ul li {
  padding: 8px 0 8px 24px;
  font-size: 0.9rem;
  color: var(--ink-2);
  line-height: 1.7;
  position: relative;
}
.train-section ul li::before {
  content: '';
  position: absolute; left: 0; top: 14px;
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
}
.train-section ul li strong {
  color: var(--ink);
  font-weight: 700;
}

/* ===== FAQ Page ===== */
.faq-filters {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}
.faq-filter {
  padding: 8px 18px;
  font-size: 0.85rem; font-weight: 600;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  color: var(--ink-3);
  transition: all var(--t-fast);
  cursor: pointer;
  background: var(--white);
}
.faq-filter:hover {
  border-color: var(--green);
  color: var(--green-dark);
}
.faq-filter.active {
  background: var(--green);
  color: var(--black);
  border-color: var(--green);
}
.faq-search {
  width: 100%;
  max-width: 480px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  font-size: 0.92rem;
  margin-bottom: var(--space-lg);
  transition: all var(--t-fast);
}
.faq-search:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(82,227,151,0.15);
}

/* FAQ group */
.faq-group {
  margin-bottom: var(--space-xl);
}
.faq-group-title {
  font-size: 1.3rem; font-weight: 800;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--green);
  display: inline-block;
}

/* ===== SEO Keywords Box ===== */
.seo-box {
  margin-top: var(--space-xl);
  padding: var(--space-md);
  background: var(--green-mist);
  border-radius: var(--r-md);
  font-size: 0.78rem;
  color: var(--ink-3);
  line-height: 2;
}
.seo-box strong {
  display: block;
  color: var(--ink-2);
  margin-bottom: 6px;
  font-size: 0.82rem;
}

/* ===== Responsive — v4 新增 ===== */
@media (max-width: 1024px) {
  .invest-grid { grid-template-columns: 1fr; }
  .direction-grid { grid-template-columns: repeat(2, 1fr); }
  .mat-grid { grid-template-columns: 1fr; }
  .train-layout { grid-template-columns: 1fr; }
  .train-toc { position: static; max-height: none; margin-bottom: var(--space-lg); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stats-bar .stat { border-right: none; padding: 0; }
  .stats-bar .stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.1); padding-right: 24px; }
  .stats-bar .stat:nth-child(even) { padding-left: 24px; }
}

@media (max-width: 768px) {
  .direction-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .stats-bar .stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.1); padding-right: 16px; }
  .stats-bar .stat:nth-child(even) { padding-left: 16px; }
}

@media (max-width: 480px) {
  .stats-bar { grid-template-columns: 1fr; }
  .stats-bar .stat { border-right: none !important; padding: 0 !important; }
}

/* ===== Print ===== */
@media print {
  .nav, .float-contact, .nav-overlay, .scroll-progress { display: none !important; }
  body { color: #000; background: #fff; }
  .section { padding: 20px 0; }
}

/* ===== Hidden SEO Links (visually hidden, crawlable) ===== */
.hidden-links {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  padding: 0;
  margin: -1px;
}

/* ===== FAQ Pages - GEO优化版：默认展开、客户友好、AI友好 ===== */
/* nav 样式已统一在基础 Navigation 区块，此处不再重复覆盖 */

.faq-region-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}
.faq-region-nav a {
  color: #444;
  font-size: 13px;
  text-decoration: none;
  padding: 6px 12px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  transition: all 150ms ease;
}
.faq-region-nav a:hover {
  color: var(--accent-dark);
  border-color: var(--green);
  background: var(--green-pale);
}
.faq-region-nav a.current {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
  font-weight: 500;
}

/* 总览面板样式 */
.faq-overview {
  background: linear-gradient(135deg, #0a7 0%, #085 100%);
  color: #fff;
  padding: 36px 0;
  margin: 0 0 30px;
  border-radius: 12px;
}
.faq-overview-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.faq-overview-stat {
  background: rgba(255,255,255,0.1);
  padding: 18px;
  border-radius: 8px;
  backdrop-filter: blur(4px);
}
.faq-overview-stat-label { font-size: 12px; opacity: 0.85; margin-bottom: 4px; }
.faq-overview-stat-num { font-size: 32px; font-weight: 900; line-height: 1; margin-bottom: 4px; }
.faq-overview-stat-note { font-size: 11px; opacity: 0.85; }

.faq-overview-tables {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}
.faq-overview-card {
  background: rgba(255,255,255,0.95);
  color: #222;
  padding: 18px;
  border-radius: 8px;
}
.faq-overview-card h3 { font-size: 14px; font-weight: 700; margin-bottom: 10px; color: #333; }
.faq-overview-card table { width: 100%; font-size: 13px; border-collapse: collapse; }
.faq-overview-card th { padding: 6px; text-align: left; background: #f5f5f5; border-bottom: 2px solid #ddd; font-size: 12px; }
.faq-overview-card td { padding: 6px; border-bottom: 1px solid #eee; }

@media (max-width: 720px) {
  .faq-overview-tables { grid-template-columns: 1fr; }
  .faq-overview-stat-num { font-size: 24px; }
  .faq-overview { padding: 24px 0; }
}

/* FAQ 列表 — 全部默认展开，答案清晰可见 */
.faq-list {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 0 40px;
}
.faq-list details {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  margin-bottom: 10px;
  padding: 14px 20px;
  transition: all var(--t-fast);
}
.faq-list details:hover {
  border-color: var(--green-light);
  box-shadow: var(--shadow-sm);
}
.faq-list summary {
  cursor: pointer;
  padding: 4px 0;
  color: #1a1a1a;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  transition: color var(--t-fast);
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: "Q";
  color: #fff;
  background: var(--green);
  font-weight: 800;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  flex-shrink: 0;
  line-height: 1.6;
  margin-top: 2px;
}
.faq-list summary:hover {
  color: var(--green-dark);
}
.faq-list details[open] summary {
  color: #0a7;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px dashed #e0e0e0;
}
.faq-list .faq-a {
  /* 强制答案可见：默认全部展开 */
  max-height: none !important;
  overflow: visible !important;
  padding: 8px 0 4px 28px;
  color: #333;
  font-size: 14px;
  line-height: 1.85;
  background: transparent;
  font-weight: 400;
}
.faq-list .faq-a strong { color: var(--green-dark); font-weight: 700; }
.faq-list details[open]::after { content: none !important; }

.faq-page-hero {
  padding: 25px 0 10px;
  text-align: center;
}
.faq-page-hero h1 {
  font-size: 1.3rem;
  color: #333;
  margin-bottom: 6px;
}
.faq-page-hero p {
  color: #888;
  font-size: 0.82rem;
  margin: 3px 0;
}