/* ============================================
   曲速增长 Warpclaw — 跃迁紫主题 · 高端官网
   ============================================ */

:root {
  /* 跃迁紫主色 */
  --purple-950: #1e0a2e;
  --purple-900: #2d1b4e;
  --purple-800: #3d2a5c;
  --purple-700: #5b3d8c;
  --purple-600: #6d28d9;
  --purple-500: #7c3aed;
  --purple-400: #8b5cf6;
  --purple-300: #a78bfa;
  --purple-200: #c4b5fd;
  --purple-100: #ede9fe;
  --purple-50: #f5f3ff;

  /* 语义色 */
  --color-bg: #0f0a18;
  --color-bg-elevated: #1a1225;
  --color-bg-card: #1e1528;
  --color-surface: #251a35;
  --color-border: rgba(167, 139, 250, 0.15);
  --color-text: #f3eef9;
  --color-text-muted: #a78bfa;
  --color-text-dim: #8b7aa3;
  --color-accent: #a78bfa;
  --color-accent-bright: #c4b5fd;

  /* 渐变 */
  --gradient-hero: linear-gradient(165deg, #1e0a2e 0%, #2d1b4e 40%, #1a1225 100%);
  --gradient-card: linear-gradient(145deg, rgba(45, 27, 78, 0.6) 0%, rgba(30, 10, 46, 0.8) 100%);
  --gradient-glow: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 58, 237, 0.35), transparent 60%);
  --gradient-cta: linear-gradient(135deg, #7c3aed 0%, #6d28d9 50%, #5b3d8c 100%);

  /* 字体 */
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: "Noto Serif SC", Georgia, serif;

  /* 间距与圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --container: min(1120px, 92vw);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  min-height: 100%;
  min-height: 100dvh;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: #030208;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
}

main {
  position: relative;
  z-index: 1;
}

/* ---------- 星际穿越风格背景（深邃 + 移动端兼容） ---------- */
.cosmos {
  position: fixed;
  inset: 0;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  min-height: 100vh;
  min-height: 100dvh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
}

/* 深邃太空底色：星际穿越式近黑 + 极 subtle 蓝紫 */
.cosmos-depth {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 150% 120% at 50% 0%, rgba(8, 6, 22, 0.98) 0%, transparent 45%),
    radial-gradient(ellipse 120% 100% at 80% 50%, rgba(5, 4, 18, 0.95) 0%, transparent 50%),
    radial-gradient(ellipse 100% 120% at 20% 70%, rgba(6, 5, 20, 0.93) 0%, transparent 50%),
    radial-gradient(ellipse 80% 80% at 50% 50%, transparent 30%, rgba(2, 1, 8, 0.4) 70%, rgba(1, 0, 5, 0.85) 100%),
    linear-gradient(180deg, #040210 0%, #03020a 30%, #020108 60%, #010105 100%);
}

/* 星云：星际尘埃感，更淡更深邃 */
.cosmos-nebula {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 70% 50% at 25% 25%, rgba(25, 20, 45, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse 55% 55% at 78% 45%, rgba(18, 15, 38, 0.14) 0%, transparent 52%),
    radial-gradient(ellipse 50% 70% at 50% 88%, rgba(22, 18, 48, 0.12) 0%, transparent 58%);
  animation: nebulaDrift 24s ease-in-out infinite;
}

@keyframes nebulaDrift {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.9; transform: scale(1.03); }
}

/* 太空星球点缀 */
.cosmos-planets {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.planet {
  position: absolute;
  border-radius: 50%;
  filter: blur(0.5px);
}

/* 左上角：紫罗兰小行星 */
.planet-1 {
  width: 120px;
  height: 120px;
  left: 8%;
  top: 18%;
  background: radial-gradient(circle at 35% 35%, rgba(196, 181, 253, 0.4), rgba(124, 58, 237, 0.25) 40%, rgba(45, 25, 75, 0.2));
  box-shadow: inset -15px -15px 30px rgba(0, 0, 0, 0.3);
  opacity: 0.85;
}

/* 右上：蓝紫色星球 */
.planet-2 {
  width: 200px;
  height: 200px;
  right: 5%;
  top: 25%;
  background: radial-gradient(circle at 30% 30%, rgba(167, 139, 250, 0.35), rgba(91, 61, 140, 0.25) 50%, rgba(30, 15, 55, 0.2));
  box-shadow: inset -25px -25px 50px rgba(0, 0, 0, 0.4);
  opacity: 0.7;
}

/* 左侧中部：小卫星 */
.planet-3 {
  width: 60px;
  height: 60px;
  left: 3%;
  top: 55%;
  background: radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.2), rgba(139, 92, 246, 0.15) 60%, transparent);
  opacity: 0.8;
}

/* 右下角：深紫星球 */
.planet-4 {
  width: 160px;
  height: 160px;
  right: 12%;
  bottom: 15%;
  background: radial-gradient(circle at 25% 25%, rgba(139, 92, 246, 0.3), rgba(59, 40, 100, 0.2) 45%, rgba(20, 10, 40, 0.15));
  box-shadow: inset -20px -20px 40px rgba(0, 0, 0, 0.35);
  opacity: 0.65;
}

/* 左下：小行星 */
.planet-5 {
  width: 80px;
  height: 80px;
  left: 15%;
  bottom: 25%;
  background: radial-gradient(circle at 38% 38%, rgba(196, 181, 253, 0.3), rgba(109, 40, 217, 0.2) 55%, transparent);
  opacity: 0.75;
}

.cosmos-stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.2px 1.2px at 8% 12%, rgba(255,255,255,0.38), transparent),
    radial-gradient(1px 1px at 18% 25%, rgba(255,255,255,0.42), transparent),
    radial-gradient(1.5px 1.5px at 28% 8%, rgba(255,255,255,0.28), transparent),
    radial-gradient(1px 1px at 42% 18%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.2px 1.2px at 55% 5%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 68% 22%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1.5px 1.5px at 78% 12%, rgba(255,255,255,0.33), transparent),
    radial-gradient(1px 1px at 88% 28%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1.2px 1.2px at 12% 45%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 35% 55%, rgba(255,255,255,0.38), transparent),
    radial-gradient(1.5px 1.5px at 52% 48%, rgba(255,255,255,0.2), transparent),
    radial-gradient(1px 1px at 72% 58%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.2px 1.2px at 92% 52%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 5% 72%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1.2px 1.2px at 22% 82%, rgba(255,255,255,0.33), transparent),
    radial-gradient(1px 1px at 48% 78%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1.5px 1.5px at 65% 88%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 85% 75%, rgba(255,255,255,0.38), transparent),
    radial-gradient(1.2px 1.2px at 95% 92%, rgba(255,255,255,0.28), transparent);
  background-size: 100% 100%;
  background-repeat: repeat;
  animation: starTwinkle 10s ease-in-out infinite;
}

@keyframes starTwinkle {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.cosmos-stars::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 15% 35%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.2px 1.2px at 38% 42%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 62% 35%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 8% 62%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.2px 1.2px at 75% 68%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 45% 85%, rgba(255,255,255,0.4), transparent);
  background-size: 100% 100%;
  background-repeat: repeat;
}

/* 曲速拉线：星轨飞逝（桌面漂移，移动端静止以兼容） */
.cosmos-warp-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100vw;
  opacity: 0.55;
  animation: warpFlow 50s linear infinite;
}

.cosmos-warp-lines svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

@keyframes warpFlow {
  0% { transform: translateX(0); }
  100% { transform: translateX(-3%); }
}

.cosmos-warp {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100vw;
  opacity: 0.28;
}

.cosmos-warp svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

a {
  color: var(--color-accent-bright);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #e9d5ff;
}

img {
  max-width: 100%;
  height: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(15, 10, 24, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.3s ease;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.logo-en {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  margin-left: 0.25em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav a {
  color: var(--color-text-dim);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--color-text);
}

.btn-nav {
  padding: 0.5rem 1.25rem;
  background: var(--gradient-cta);
  color: #fff !important;
  border-radius: var(--radius-md);
  font-weight: 600;
}

.btn-nav:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-muted);
  border-radius: 1px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 8px 28px rgba(124, 58, 237, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent-bright);
  border: 1px solid rgba(167, 139, 250, 0.4);
}

.btn-ghost:hover {
  background: rgba(167, 139, 250, 0.1);
}

.btn-card {
  background: var(--color-surface);
  color: var(--color-accent-bright);
  border: 1px solid var(--color-border);
}

.btn-card:hover {
  background: rgba(124, 58, 237, 0.2);
  border-color: rgba(124, 58, 237, 0.4);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: calc(var(--header-h) + 24px) 24px 0;
  overflow: hidden;
}

.hero-spacer {
  flex: 1;
  min-height: 24px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero-mesh {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(at 40% 20%, rgba(124, 58, 237, 0.2) 0%, transparent 50%),
    radial-gradient(at 80% 60%, rgba(91, 61, 140, 0.15) 0%, transparent 45%),
    radial-gradient(at 20% 80%, rgba(109, 40, 217, 0.12) 0%, transparent 40%);
}

.hero-warp {
  position: absolute;
  inset: -20%;
  width: 140%;
  height: 140%;
  left: -20%;
  top: -20%;
  pointer-events: none;
}

.hero-warp svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  flex: 0 0 auto;
}

.hero-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.2s forwards;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.35s forwards;
}

.hero-highlight {
  background: linear-gradient(135deg, #c4b5fd, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-dim);
  margin-bottom: 2rem;
  line-height: 1.7;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.5s forwards;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.65s forwards;
}

.hero-cta .btn {
  min-width: 160px;
}

.hero-scroll {
  flex: 0 0 auto;
  padding-bottom: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-dim);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  position: relative;
  z-index: 1;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-text-muted), transparent);
  border-radius: 1px;
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ---------- Sections ---------- */
.section {
  padding: 100px 24px;
  position: relative;
}

.section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

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

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-dim);
  font-size: 1rem;
  margin-bottom: 3rem;
}

/* ---------- 产品体系架构 ---------- */
.section-intro {
  background: var(--color-bg-elevated);
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.framework-card {
  padding: 1.75rem;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.framework-card:hover {
  border-color: rgba(124, 58, 237, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(30, 10, 46, 0.5);
}

.framework-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-accent-bright);
}

.framework-card p {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  line-height: 1.6;
}

.framework-training { border-left: 3px solid var(--purple-500); }
.framework-platform { border-left: 3px solid var(--purple-400); }
.framework-service { border-left: 3px solid var(--purple-300); }
.framework-consulting { border-left: 3px solid var(--purple-200); }

/* ---------- 培训产品与报价 ---------- */
.section-training {
  background: var(--color-bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  padding: 2rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.pricing-card:hover {
  border-color: rgba(124, 58, 237, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(15, 10, 24, 0.6);
}

.pricing-featured {
  border-color: rgba(124, 58, 237, 0.5);
  background: linear-gradient(145deg, rgba(45, 27, 78, 0.7) 0%, rgba(30, 10, 46, 0.9) 100%);
  box-shadow: 0 8px 32px rgba(124, 58, 237, 0.2);
}

.pricing-featured:hover {
  box-shadow: 0 20px 56px rgba(124, 58, 237, 0.3);
}

.pricing-consult {
  border-color: rgba(167, 139, 250, 0.3);
}

/* 滚动进入视口动画 */
.pricing-card,
.framework-card,
.platform-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.pricing-card.is-visible,
.framework-card.is-visible,
.platform-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.pricing-badge {
  position: absolute;
  top: -1px;
  right: 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent-bright);
  background: rgba(124, 58, 237, 0.25);
  padding: 0.25rem 0.65rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-text);
  padding-right: 5rem;
}

.pricing-desc {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.pricing-amount {
  margin-bottom: 1rem;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.15em;
}

.pricing-amount .currency {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.pricing-amount .value {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent-bright);
  line-height: 1.2;
}

.pricing-amount .unit {
  font-size: 0.9rem;
  color: var(--color-text-dim);
}

.pricing-note {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin-bottom: 0.75rem;
}

.pricing-features {
  list-style: none;
  flex: 1;
  margin-bottom: 1.5rem;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.5;
}

.pricing-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  background: var(--purple-400);
  border-radius: 50%;
}

.pricing-card .btn {
  width: 100%;
  margin-top: auto;
}

/* ---------- 平台产品 ---------- */
.section-platform {
  background: var(--color-bg-elevated);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
}

.platform-card {
  padding: 1.5rem;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.platform-card:hover {
  border-color: rgba(124, 58, 237, 0.4);
  transform: translateY(-3px);
}

.platform-icon {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-accent-bright);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.platform-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.platform-card p {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

/* ---------- 咨询与落地 ---------- */
.section-consulting {
  background: var(--color-bg);
}

.consulting-content {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.consulting-text h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-accent-bright);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.consulting-text h3:first-child {
  margin-top: 0;
}

.consulting-text p {
  font-size: 0.95rem;
  color: var(--color-text-dim);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.consulting-content .btn {
  margin-top: 2rem;
}

/* ---------- 联系方式 ---------- */
.section-contact {
  background: var(--color-bg-elevated);
  padding-bottom: 120px;
}

.contact-info {
  text-align: center;
  max-width: 360px;
  margin: 0 auto;
}

.contact-name {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-accent-bright);
  margin-bottom: 0.5rem;
}

.contact-phone {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.05em;
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}

.contact-phone:hover {
  color: var(--color-accent-bright);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 2.5rem 24px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-logo {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--color-text-dim);
  opacity: 0.8;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
  }

  .nav.is-open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .section {
    padding: 72px 20px;
  }

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

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

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

  /* 移动端背景：减少动效、缩小星球、避免溢出 */
  .cosmos-nebula {
    animation-duration: 35s;
  }

  .cosmos-warp-lines {
    animation: none;
    opacity: 0.4;
  }

  .cosmos-stars {
    animation: none;
  }

  .planet-1 { width: 70px; height: 70px; left: 5%; top: 12%; opacity: 0.6; }
  .planet-2 { width: 100px; height: 100px; right: 2%; top: 18%; opacity: 0.5; }
  .planet-3 { width: 36px; height: 36px; left: 2%; top: 50%; opacity: 0.55; }
  .planet-4 { width: 90px; height: 90px; right: 8%; bottom: 12%; opacity: 0.5; }
  .planet-5 { width: 50px; height: 50px; left: 10%; bottom: 20%; opacity: 0.55; }
}

@media (max-width: 480px) {
  .platform-grid {
    grid-template-columns: 1fr;
  }

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

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

  /* 小屏：星球再缩小，隐藏最远的两个以增强深邃感 */
  .planet-2 { width: 72px; height: 72px; right: 0; top: 15%; opacity: 0.45; }
  .planet-4 { width: 64px; height: 64px; right: 5%; bottom: 10%; opacity: 0.45; }
  .planet-5 { width: 40px; height: 40px; left: 5%; bottom: 18%; opacity: 0.5; }
}

/* 超小屏 / 竖屏：进一步保证背景不撑破 */
@media (max-width: 380px) {
  .cosmos {
    min-height: 100vh;
    min-height: 100dvh;
  }
}