/* SkateWise 产品营销页共用样式（index + features 子页） */
:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-mid: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-soft: #eff6ff;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-teal: #0d9488;
  --accent-gold: #c9a227;
  --dark-bg: #0b1220;
  --dark-mid: #111827;
  --light-bg: #f3f6fb;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #5b6b82;
  --border-color: #e2e8f0;
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  --gradient-hero: linear-gradient(145deg, #0b1a3a 0%, #1e3a8a 42%, #2563eb 100%);
  --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-teal: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
  --gradient-surface: linear-gradient(180deg, #f8fbff 0%, #eef4fb 100%);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Outfit", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Outfit", sans-serif;
  --radius-md: 12px;
  --radius-lg: 16px;
  --section-max: 1100px;
  --space-section: clamp(3.25rem, 6.5vw, 5.5rem);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--light-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
.wx-share-img {
  position: absolute;
  top: -9999px;
  left: -9999px;
  width: 300px;
  height: 300px;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
[hidden] { display: none !important; }

.mobile-only { display: none !important; }
.desktop-only { display: block; }
.mobile-hide { display: block; }

.system-entry-float {
  position: fixed;
  top: 15px;
  right: 15px;
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(37, 99, 235, 0.94);
  color: #fff;
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: transform 0.25s var(--ease-out), background 0.25s ease;
}
.system-entry-float:hover { transform: translateY(-2px); background: rgba(30, 64, 175, 0.96); }

.back-link {
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 2000;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-color);
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

/* —— Nav —— */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 1000;
  border-bottom: 1px solid rgba(226, 232, 240, 0.85);
  transition: box-shadow 0.25s ease;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.logo { display: flex; align-items: center; gap: 0.75rem; min-width: 0; }
.logo-icon { width: 40px; height: 40px; flex-shrink: 0; }
.logo-text-wrap { display: flex; align-items: baseline; gap: 0.5rem; min-width: 0; }
.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.logo-subtext { font-size: 0.75rem; color: var(--text-secondary); white-space: nowrap; }
.nav-links { display: flex; gap: 0.35rem; list-style: none; flex-wrap: wrap; }
.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.88rem;
  padding: 7px 12px;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover { color: var(--primary-color); background: var(--primary-soft); }

/* —— Hero：Brand first + full-bleed —— */
.hero {
  position: relative;
  min-height: min(100vh, 820px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 120px 24px 72px;
  color: #fff;
  text-align: left;
  overflow: hidden;
  background: var(--gradient-hero);
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% 28%;
  transform: scale(1.02);
  animation: heroKen 18s var(--ease-out) both;
}
.hero-media-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(6, 12, 32, 0.9) 0%, rgba(12, 28, 72, 0.72) 40%, rgba(37, 99, 235, 0.28) 100%),
    linear-gradient(180deg, rgba(6, 12, 32, 0.18) 0%, rgba(6, 12, 32, 0.42) 55%, rgba(6, 12, 32, 0.9) 100%);
}
.hero-media-grain {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
  mix-blend-mode: soft-light;
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto 0 0;
  margin-right: auto;
  margin-left: max(0px, calc((100% - 1100px) / 2));
}
.hero-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.35rem;
  animation: fadeInUp 0.7s var(--ease-out) both;
}
.hero-brand-mark {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.25));
}
.hero-brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.15;
}
.hero-brand-en {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}
.hero-brand-zh {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: rgba(255, 255, 255, 0.78);
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 0.85rem;
  max-width: 18em;
  color: rgba(255, 255, 255, 0.96);
  animation: fadeInUp 0.7s var(--ease-out) 0.08s both;
}
.hero-lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.86);
  margin-bottom: 1.75rem;
  max-width: 28em;
  animation: fadeInUp 0.7s var(--ease-out) 0.16s both;
}
.hero-cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
  animation: fadeInUp 0.7s var(--ease-out) 0.24s both;
}
.hero-cta .btn-primary-hero {
  background: #fff;
  color: var(--primary-dark);
  padding: 0.9rem 1.55rem;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.hero-cta .btn-outline-hero {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  padding: 0.9rem 1.4rem;
  font-size: 0.92rem;
  border-radius: 10px;
  backdrop-filter: blur(6px);
}
.hero-cta .btn-primary-hero:hover,
.hero-cta .btn-outline-hero:hover {
  transform: translateY(-2px);
}

.hero-training-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 0.25rem;
  padding: 0.6rem 1.15rem;
  min-height: 40px;
  color: #fff;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.86rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1.5px solid rgba(255, 255, 255, 0.42);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s var(--ease-out);
  animation: fadeInUp 0.7s var(--ease-out) 0.32s both;
}
.hero-training-link:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.62);
  color: #fff;
  transform: translateY(-1px);
}

/* —— Buttons —— */
.btn {
  padding: 0.85rem 1.6rem;
  border-radius: 10px;
  font-weight: 600;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s ease, background 0.25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  white-space: nowrap;
  font-family: inherit;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-primary { background: var(--gradient-primary); color: white; box-shadow: var(--shadow-md); }
.btn-outline {
  background: white;
  color: var(--primary-color);
  border: 1.5px solid var(--primary-color);
}

/* —— Section shell —— */
.section-shell {
  max-width: var(--section-max);
  margin: 0 auto;
  padding: 0 20px;
}
.section-header { text-align: center; margin-bottom: 2.25rem; }
.section-eyebrow {
  display: inline-block;
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-gold);
}
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3vw, 2rem);
  margin-bottom: 0.6rem;
  color: var(--primary-dark);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-header p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 34em;
  margin: 0 auto;
}
.section-header--on-dark .section-eyebrow { color: rgba(245, 200, 90, 0.92); }
.section-header--on-dark h2 { color: #fff; }
.section-header--on-dark p { color: rgba(255, 255, 255, 0.88); }

/* —— Capabilities：线性图标 + 细网格 —— */
.capabilities {
  padding: var(--space-section) 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(37, 99, 235, 0.06), transparent 60%),
    var(--gradient-surface);
  border-bottom: 1px solid var(--border-color);
}
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
  background: #fff;
}
.cap-item {
  padding: 1.55rem 1.4rem 1.45rem;
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.28s var(--ease-out), box-shadow 0.28s var(--ease-out), transform 0.28s var(--ease-out);
  position: relative;
}
.cap-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background 0.28s ease;
}
.cap-item:hover {
  background: linear-gradient(180deg, #f7faff 0%, #eef5ff 100%);
  transform: translateY(-1px);
  z-index: 1;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.08);
}
.cap-item:hover::after { background: var(--primary-color); }
.cap-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 0.85rem;
  border-radius: 10px;
  color: var(--primary-color);
  background: linear-gradient(145deg, #eff6ff 0%, #e0ebff 100%);
  border: 1px solid rgba(37, 99, 235, 0.12);
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}
.cap-icon svg { width: 20px; height: 20px; }
.cap-item:hover .cap-icon {
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
}
.cap-item h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.cap-item p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.9rem;
}

/* —— Loop —— */
.loop-section {
  padding: var(--space-section) 0;
  background: #fff;
  position: relative;
}
.loop-section::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: min(120px, 30%);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(201, 162, 39, 0.55), transparent);
}
.loop-track {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  counter-reset: none;
}
.loop-step {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.3rem 1.15rem;
  background: linear-gradient(180deg, #f7faff 0%, #eef4ff 100%);
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: var(--radius-md);
  position: relative;
  transition: transform 0.28s var(--ease-out), border-color 0.28s ease, box-shadow 0.28s ease;
}
.loop-step:hover {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.28);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.1);
}
.loop-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -0.55rem;
  width: 0.35rem;
  height: 0.35rem;
  border-right: 2px solid var(--primary-color);
  border-top: 2px solid var(--primary-color);
  transform: translateY(-50%) rotate(45deg);
  opacity: 0.45;
  z-index: 1;
}
.loop-num {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
}
.loop-icon {
  display: inline-flex;
  color: var(--primary-color);
  opacity: 0.9;
}
.loop-icon svg { width: 22px; height: 22px; }
.loop-label {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* —— Journeys —— */
.section-block { max-width: var(--section-max); margin: var(--space-section) auto; padding: 0 20px; }
.journey-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.35rem;
}
.journey-card {
  background: transparent;
  border-radius: 0;
  padding: 0.35rem 0.15rem 1.25rem 0;
  border: none;
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--primary-color), rgba(201, 162, 39, 0.7)) 1;
  box-shadow: none;
  transition: transform 0.28s var(--ease-out);
}
.journey-card:hover { transform: translateY(-2px); }
.journey-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
  border-radius: 9px;
  background: var(--primary-soft);
  border: 1px solid rgba(37, 99, 235, 0.1);
}
.journey-icon svg { width: 18px; height: 18px; }
.journey-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
}
.journey-card .journey-tag {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  letter-spacing: 0.02em;
}
.journey-list { list-style: none; }
.journey-list li {
  padding: 0.55rem 0 0.55rem 1.15rem;
  position: relative;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.journey-list li:last-child { border-bottom: none; }
.journey-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.05rem;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--primary-color);
}
.journey-list li:hover {
  color: var(--text-primary);
  padding-left: 1.3rem;
}
.journey-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-color);
  transition: gap 0.2s ease;
}
.journey-more:hover { gap: 8px; }

.detail-cta-bar {
  text-align: center;
  margin-top: 1.75rem;
  padding: 1.45rem 1.1rem;
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.7) 0%, rgba(255, 255, 255, 0.4) 100%);
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: var(--radius-md);
}
.detail-cta-bar p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

/* —— Features 子页模块（保留） —— */
.module-section { max-width: 900px; margin: 0 auto; padding: 0 20px 52px; }
.module-detail {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}
.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0;
}
.module-header-left { display: flex; align-items: center; gap: 0.9rem; min-width: 0; }
.module-badge {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.icon-blue { background: var(--gradient-primary); }
.icon-green { background: var(--gradient-secondary); }
.icon-orange { background: var(--gradient-accent); }
.icon-teal { background: var(--gradient-teal); }
.module-title h3 { font-size: 1.2rem; margin-bottom: 0.2rem; }
.module-subtitle { font-size: 0.82rem; color: var(--text-secondary); }
.module-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 1rem;
}
.feature-list { list-style: none; }
.feature-list li {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: start;
  gap: 0.7rem;
  font-size: 0.9rem;
}
.feature-list li:last-child { border-bottom: none; }
.checkmark { color: var(--accent-green); font-weight: bold; }
.usage-scenario {
  background: var(--light-bg);
  padding: 1rem;
  border-radius: 10px;
  border-left: 4px solid var(--primary-color);
}
.usage-scenario h4 { margin-bottom: 0.75rem; font-size: 1rem; }
.usage-scenario ul { list-style: none; }
.usage-scenario li {
  padding: 0.4rem 0 0.4rem 1.3rem;
  position: relative;
  font-size: 0.88rem;
  color: var(--text-secondary);
}
.usage-scenario li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

/* —— Developer / proof —— */
.developer-section {
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(37, 99, 235, 0.1), transparent 55%),
    linear-gradient(180deg, #f0f7ff 0%, #e8f1fb 100%);
  padding: var(--space-section) 20px;
}
.developer-container { max-width: var(--section-max); margin: 0 auto; }
.developer-grid { display: grid; grid-template-columns: 1fr; gap: 1.75rem; align-items: start; }
.developer-content { max-width: 100%; }

.developer-profile-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0.25rem 0;
  box-shadow: none;
}
.developer-content h3 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  margin-bottom: 0.45rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.developer-roles-line {
  font-size: 0.88rem;
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: 0.9rem;
  line-height: 1.5;
}
.developer-content .subtitle {
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}
.developer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 0.65rem 0 0.65rem 0.85rem;
  background: transparent;
  border-left: 3px solid rgba(37, 99, 235, 0.4);
  margin-bottom: 1.15rem;
}

.achievement-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}
.achievement-list li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.85rem 0;
  border-top: 1px solid rgba(37, 99, 235, 0.2);
}
.achievement-list strong {
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.4;
}
.achievement-list span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* legacy achievement (features 若引用则仍可用) */
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.15rem;
}
.achievement-item {
  background: var(--light-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.85rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.achievement-tag {
  display: inline-block;
  align-self: flex-start;
  background: var(--gradient-primary);
  color: white;
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.35;
}
.achievement-detail { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.45; }

.developer-profile-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.founder-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gradient-primary);
  color: white;
  padding: 9px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.88rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s ease;
}
.founder-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.student-showcase-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.85rem;
  letter-spacing: 0.02em;
}
.student-cases {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.75rem;
}
.student-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: none;
  border: 1px solid var(--border-color);
  transition: transform 0.25s var(--ease-out), border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.student-card:hover {
  transform: translateY(-3px);
  border-color: rgba(37, 99, 235, 0.45);
}
.student-card img { width: 100%; height: 120px; object-fit: cover; flex-shrink: 0; }
.student-info { padding: 0.8rem 0.75rem; flex: 1; display: flex; flex-direction: column; }
.student-info h4 { font-size: 0.9rem; margin-bottom: 0.3rem; line-height: 1.3; }
.student-info p { font-size: 0.76rem; color: var(--text-secondary); line-height: 1.45; flex: 1; }

/* —— Testimonials —— */
.testimonials {
  max-width: var(--section-max);
  margin: var(--space-section) auto;
  padding: 0 20px;
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.testimonial-card {
  background: transparent;
  padding: 1rem 0 0.65rem;
  border-radius: 0;
  box-shadow: none;
  border: none;
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--primary-color), rgba(201, 162, 39, 0.55)) 1;
  transition: transform 0.25s var(--ease-out);
}
.testimonial-card:hover { transform: translateY(-2px); }
.testimonial-text {
  font-style: normal;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
  font-size: 0.92rem;
}
.testimonial-note {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 0.65rem;
}
.testimonial-author { display: flex; align-items: center; gap: 0.75rem; }
.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gradient-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}
.author-info strong { display: block; margin-bottom: 0.15rem; font-size: 0.88rem; }
.author-info span { color: var(--text-secondary); font-size: 0.8rem; }

/* —— Contact：品牌蓝，非紫 —— */
.wechat-section {
  background: var(--gradient-hero);
  padding: var(--space-section) 20px;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}
.wechat-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 20%, rgba(255, 255, 255, 0.12), transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(37, 99, 235, 0.35), transparent 45%);
  pointer-events: none;
}
.wechat-container { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.wechat-section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 2rem);
  margin-bottom: 0.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.wechat-card {
  background: rgba(255, 255, 255, 0.96);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.35rem;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.25rem;
  align-items: center;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.35);
}
.wechat-info h3 { color: var(--text-primary); font-size: 1.2rem; margin-bottom: 0.45rem; }
.wechat-address { color: var(--text-secondary); font-size: 0.88rem; margin-bottom: 0.85rem; }
.wechat-qr { display: flex; gap: 0.85rem; align-items: center; }
.wechat-qr img {
  width: 110px;
  height: 110px;
  border-radius: 10px;
  border: 2px solid var(--primary-light);
}
.wechat-id { color: var(--text-primary); font-size: 0.95rem; font-weight: 600; }
.wechat-base { color: var(--text-secondary); font-size: 0.85rem; margin-top: 0.4rem; }
.wechat-actions { display: flex; flex-direction: column; gap: 0.65rem; min-width: 150px; }

/* —— Footer —— */
footer {
  background: var(--dark-bg);
  color: white;
  padding: 48px 20px 28px;
}
.footer-content {
  max-width: var(--section-max);
  margin: 0 auto 1.5rem;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 2rem;
}
.footer-column h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.footer-blurb {
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}
.footer-note {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.78rem;
  line-height: 1.55;
  max-width: 36rem;
}
.footer-column ul { list-style: none; }
.footer-column ul li { margin-bottom: 0.55rem; }
.footer-column a {
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.2s ease;
}
.footer-column a:hover { color: #fff; }
.footer-bottom {
  text-align: center;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.88rem;
}
.footer-legal {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.55);
  max-width: 42rem;
  margin: 0.65rem auto 0;
  line-height: 1.5;
}
.footer-beian { font-size: 0.78rem; margin-top: 0.65rem; }
.footer-beian a { color: rgba(255, 255, 255, 0.55); text-decoration: none; }

/* —— Motion —— */
.fade-in { opacity: 1; transform: none; }
html.js-enabled .fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out);
}
html.js-enabled .fade-in.visible { opacity: 1; transform: translateY(0); }
html.js-enabled .cap-item.fade-in:nth-child(1) { transition-delay: 0.02s; }
html.js-enabled .cap-item.fade-in:nth-child(2) { transition-delay: 0.06s; }
html.js-enabled .cap-item.fade-in:nth-child(3) { transition-delay: 0.1s; }
html.js-enabled .cap-item.fade-in:nth-child(4) { transition-delay: 0.14s; }
html.js-enabled .cap-item.fade-in:nth-child(5) { transition-delay: 0.18s; }
html.js-enabled .cap-item.fade-in:nth-child(6) { transition-delay: 0.22s; }
html.js-enabled .loop-step.fade-in:nth-child(1) { transition-delay: 0.02s; }
html.js-enabled .loop-step.fade-in:nth-child(2) { transition-delay: 0.08s; }
html.js-enabled .loop-step.fade-in:nth-child(3) { transition-delay: 0.14s; }
html.js-enabled .loop-step.fade-in:nth-child(4) { transition-delay: 0.2s; }
html.js-enabled .journey-card.fade-in:nth-child(1) { transition-delay: 0.02s; }
html.js-enabled .journey-card.fade-in:nth-child(2) { transition-delay: 0.08s; }
html.js-enabled .journey-card.fade-in:nth-child(3) { transition-delay: 0.14s; }

.toggle-btn {
  display: none;
  border: none;
  background: var(--primary-light);
  color: var(--primary-color);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
}
.toggle-btn--on-dark {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}
.collapse-head { cursor: pointer; user-select: none; }
.section-header.collapse-head {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0.75rem;
  text-align: center;
}
.section-header.collapse-head > div { flex: 1; min-width: 0; }
.collapse-icon { display: inline-block; transition: transform 0.25s var(--ease-out); }
.collapsible.open .collapse-icon { transform: rotate(180deg); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%) translateY(10px);
  background: rgba(15, 23, 42, 0.95);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 4000;
  opacity: 0;
  transition: all 0.25s ease;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroKen {
  from { transform: scale(1.06); }
  to { transform: scale(1.02); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-media img,
  .hero-brand,
  .hero h1,
  .hero-lead,
  .hero-cta,
  .hero-training-link {
    animation: none !important;
  }
  html.js-enabled .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .cap-item:hover,
  .loop-step:hover,
  .journey-card:hover { transform: none; }
}

/* —— Responsive —— */
@media (max-width: 1024px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .loop-track { grid-template-columns: repeat(2, 1fr); }
  .loop-step:nth-child(2)::after { display: none; }
  .journey-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .achievement-list,
  .achievement-grid { grid-template-columns: 1fr; }
  .achievement-list li {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
  }
  .achievement-list span { text-align: right; }
  .achievement-item {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .achievement-tag { max-width: 58%; }
  .achievement-detail { text-align: right; }
  .student-cases {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }
  .student-card { grid-column: auto !important; }
}

@media (min-width: 1025px) {
  .student-cases { grid-template-columns: repeat(6, 1fr); }
  .student-card:nth-child(1) { grid-column: 1 / 3; }
  .student-card:nth-child(2) { grid-column: 3 / 5; }
  .student-card:nth-child(3) { grid-column: 5 / 7; }
  .student-card:nth-child(4) { grid-column: 2 / 4; }
  .student-card:nth-child(5) { grid-column: 4 / 6; }
}

@media (max-width: 768px) {
  .mobile-only { display: block !important; }
  .desktop-only { display: none !important; }
  .mobile-hide { display: none !important; }

  .system-entry-float,
  .back-link { top: 10px; font-size: 12px; padding: 6px 12px; }
  .back-link { left: 10px; }

  .nav-container { padding: 0.7rem 1rem; }
  .logo-icon { width: 32px; height: 32px; }
  .logo-text { font-size: 1.08rem; }
  .logo-subtext,
  .nav-links { display: none; }

  .hero {
    min-height: auto;
    padding: 100px 16px 48px;
    align-items: flex-end;
    text-align: left;
  }
  .hero-media img { object-position: 55% 25%; }
  .hero-inner {
    margin-left: 0;
    max-width: none;
  }
  .hero-brand { margin-bottom: 1rem; gap: 0.65rem; }
  .hero-brand-mark { width: 44px; height: 44px; }
  .hero-brand-en { font-size: clamp(2rem, 9vw, 2.6rem); }
  .hero-brand-zh { font-size: 0.88rem; letter-spacing: 0.22em; }
  .hero h1 { font-size: 1.35rem; margin-bottom: 0.65rem; }
  .hero-lead { font-size: 0.95rem; margin-bottom: 1.35rem; }
  .hero-cta { flex-direction: row; flex-wrap: nowrap; gap: 8px; }
  .hero-cta .btn {
    flex: 1 1 0;
    min-width: 0;
    padding: 0.75rem 0.4rem;
    font-size: 0.86rem;
  }
  .hero-training-link {
    width: 100%;
    box-sizing: border-box;
  }

  .capabilities { padding: 2.5rem 0; }
  .section-shell { padding: 0 16px; }
  .section-header { margin-bottom: 1.25rem; }
  .section-eyebrow { font-size: 0.68rem; margin-bottom: 0.4rem; }
  .section-header h2 { font-size: 1.4rem; }
  .section-header p { font-size: 0.88rem; }

  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-item { padding: 1.05rem 0.9rem 1rem; }
  .cap-icon { width: 34px; height: 34px; margin-bottom: 0.65rem; border-radius: 8px; }
  .cap-icon svg { width: 17px; height: 17px; }
  .cap-item h3 { font-size: 0.92rem; }
  .cap-item p {
    font-size: 0.8rem;
    line-height: 1.5;
  }

  .loop-section { padding: 2.5rem 0; }
  .loop-track {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.55rem;
  }
  .loop-step { padding: 0.95rem 0.85rem; }
  .loop-step::after { display: none; }
  .loop-icon svg { width: 20px; height: 20px; }
  .loop-label { font-size: 0.95rem; }

  .section-block,
  .testimonials { margin: 2.5rem auto; padding: 0 16px; }
  .journey-card { padding: 0.25rem 0 1rem; }
  .journey-icon { width: 32px; height: 32px; margin-bottom: 0.55rem; }
  .journey-card h3 { font-size: 1rem; }
  .journey-list li { font-size: 0.84rem; }

  .toggle-btn { display: inline-flex; align-items: center; justify-content: center; }
  .module-detail { padding: 1rem; }
  .module-content { grid-template-columns: 1fr; gap: 0.75rem; margin-top: 0.75rem; }
  .module-subtitle { display: none; }

  .developer-section { padding: 2.5rem 16px; }
  .developer-content h3 { font-size: 1.3rem; }
  .developer-roles-line { font-size: 0.8rem; }
  .developer-content .subtitle { font-size: 0.9rem; }
  .achievement-list { gap: 0; margin-bottom: 1rem; }
  .achievement-list li { padding: 0.7rem 0; }
  .achievement-list strong { font-size: 0.82rem; max-width: 58%; }
  .achievement-list span { font-size: 0.76rem; }

  .student-cases { grid-template-columns: 1fr; gap: 0.55rem; }
  .student-card {
    flex-direction: row;
    display: grid;
    grid-template-columns: 84px 1fr;
    column-gap: 0.85rem;
    grid-column: auto !important;
  }
  .student-card img { height: 100%; min-height: 84px; }
  .student-info { padding: 0.7rem 0.85rem 0.7rem 0; }
  .student-info h4 { font-size: 0.92rem; }
  .student-info p { font-size: 0.78rem; }

  .wechat-section { padding: 2.5rem 16px; }
  .wechat-card { grid-template-columns: 1fr; padding: 1rem; }
  .wechat-qr { align-items: flex-start; }
  .wechat-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .wechat-actions .btn {
    flex: 1 1 calc(50% - 4px);
    min-width: 0;
    font-size: 0.85rem;
    padding: 0.7rem 0.45rem;
  }

  footer { padding: 32px 16px 18px; }
  .footer-content { grid-template-columns: 1fr; gap: 1.25rem; }
}

@media (max-width: 600px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .loop-track { grid-template-columns: repeat(2, 1fr); }
  .hero-cta { flex-wrap: nowrap; }
  .wechat-actions .btn:last-child {
    flex: 1 1 100%;
  }
}

@media print {
  .navbar,
  .hero-cta,
  .system-entry-float,
  .back-link { display: none !important; }
  body { background: white; }
  .module-detail { box-shadow: none; page-break-inside: avoid; }
}