/* ============================================
   Spiral Reading — 螺旋阅读
   中心焦点 × 螺旋外延 × 柔和曲线 × 高品牌识别
   ============================================ */

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0c0e14;
  --bg-secondary: #141722;
  --bg-card: #1a1e2e;
  --bg-hero: #10131c;
  --text-primary: #eef0f6;
  --text-secondary: #a0a8c0;
  --text-muted: #6b7394;
  --text-light: #3e4563;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-glow: rgba(108, 92, 231, 0.25);
  --accent-subtle: rgba(108, 92, 231, 0.08);
  --accent2: #00cec9;
  --accent2-glow: rgba(0, 206, 201, 0.2);
  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.10);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1400px;
  --section-gap: 80px;
  --spiral-rotate: 0deg;
}

/* ===== Body — 深色宇宙背景 ===== */
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

/* 背景螺旋光晕 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(108, 92, 231, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 30% 70%, rgba(0, 206, 201, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 70% 60%, rgba(108, 92, 231, 0.04) 0%, transparent 50%);
}

/* 浮动粒子动画 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(162, 155, 254, 0.3) 50%, transparent 50%),
    radial-gradient(1px 1px at 30% 60%, rgba(0, 206, 201, 0.2) 50%, transparent 50%),
    radial-gradient(1px 1px at 50% 40%, rgba(162, 155, 254, 0.25) 50%, transparent 50%),
    radial-gradient(1px 1px at 70% 80%, rgba(108, 92, 231, 0.2) 50%, transparent 50%),
    radial-gradient(1px 1px at 90% 30%, rgba(0, 206, 201, 0.15) 50%, transparent 50%),
    radial-gradient(1px 1px at 20% 90%, rgba(162, 155, 254, 0.2) 50%, transparent 50%),
    radial-gradient(1px 1px at 60% 10%, rgba(108, 92, 231, 0.15) 50%, transparent 50%),
    radial-gradient(1px 1px at 80% 50%, rgba(0, 206, 201, 0.2) 50%, transparent 50%);
  animation: particleDrift 20s ease-in-out infinite alternate;
}

@keyframes particleDrift {
  0% { transform: translateY(0) translateX(0); }
  100% { transform: translateY(-20px) translateX(10px); }
}

/* ===== Navigation — 螺旋导航 ===== */
.sp-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(12, 14, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.sp-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 40px;
  gap: 32px;
}
.sp-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.sp-logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 0 16px var(--accent-glow);
  position: relative;
}
/* 螺旋轨道环 */
.sp-logo-mark::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(108, 92, 231, 0.3);
  animation: orbitPulse 3s ease-in-out infinite;
}
@keyframes orbitPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.15); opacity: 0.2; }
}
.sp-logo-text {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}
.sp-nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.sp-nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.3px;
  transition: color 0.2s;
  position: relative;
  padding-bottom: 2px;
}
.sp-nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 1px;
  transition: width 0.3s, left 0.3s;
}
.sp-nav-links a:hover { color: var(--accent-light); }
.sp-nav-links a:hover::after { width: 100%; left: 0; }
.sp-nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.sp-search-btn {
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all 0.3s;
}
.sp-search-btn:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  box-shadow: 0 0 12px var(--accent-glow);
}
.sp-mobile-menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 8px;
}
.sp-mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all 0.3s;
}

/* ===== Search Overlay ===== */
.sp-search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(12, 14, 20, 0.92);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.sp-search-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.sp-search-overlay-inner {
  width: 100%;
  max-width: 640px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  max-height: 70vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.sp-search-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  z-index: 2;
}
.sp-search-close:hover { color: var(--text-primary); }
.sp-search-box {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 16px;
}
.sp-search-box svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
  flex-shrink: 0;
}
.sp-search-input {
  width: 100%;
  border: none;
  outline: none;
  font-size: 16px;
  font-family: var(--font-body);
  background: transparent;
  color: var(--text-primary);
}
.sp-search-input::placeholder { color: var(--text-muted); }
.sp-search-results { display: flex; flex-direction: column; gap: 4px; }
.sp-search-result-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
}
.sp-search-result-item:hover { background: var(--accent-subtle); }
.sp-search-result-thumb {
  width: 56px;
  height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-secondary);
}
.sp-search-result-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sp-search-result-info { flex: 1; min-width: 0; }
.sp-search-result-cat {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 2px;
}
.sp-search-result-title {
  font-size: 14px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-primary);
}
.sp-search-empty {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== Spiral Hero — 螺旋中心焦点 ===== */
.sp-hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 40px 0;
  position: relative;
  z-index: 1;
}
.sp-hero-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.sp-hero-label::before {
  content: '';
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 1px;
}
.sp-hero-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

/* 中心焦点卡片 */
.sp-hero-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: box-shadow 0.5s, transform 0.5s;
  position: relative;
}
.sp-hero-card:hover {
  box-shadow: 0 12px 48px rgba(0,0,0,0.5), 0 0 40px var(--accent-glow);
  transform: translateY(-4px);
}
/* 螺旋光晕装饰 */
.sp-hero-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent));
  z-index: -1;
  opacity: 0;
  transition: opacity 0.5s;
}
.sp-hero-card:hover::before {
  opacity: 0.3;
}
.sp-hero-card-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  min-height: 460px;
}
.sp-hero-card-img {
  position: relative;
  overflow: hidden;
}
.sp-hero-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s;
}
.sp-hero-card:hover .sp-hero-card-img img {
  transform: scale(1.05);
}
/* 图片上的螺旋渐变遮罩 */
.sp-hero-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 60%, var(--bg-card) 100%);
}
.sp-hero-card-body {
  padding: 48px 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}
.sp-hero-card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-light);
  background: var(--accent-subtle);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
  width: fit-content;
}
.sp-hero-card-title {
  font-family: var(--font-heading);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.sp-hero-card-excerpt {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 28px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sp-hero-card-meta {
  font-size: 13px;
  color: var(--accent-light);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sp-hero-card-meta svg {
  width: 14px;
  height: 14px;
}

/* ===== Spiral Orbit — 螺旋轨道推荐 ===== */
.sp-orbit {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 40px 0;
  position: relative;
  z-index: 1;
}
.sp-orbit-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.sp-orbit-label::before {
  content: '';
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border-radius: 1px;
}
.sp-orbit-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

/* 螺旋轨道容器 */
.sp-orbit-ring {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

/* 轨道连接曲线（装饰） */
.sp-orbit-ring::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120%;
  height: 120%;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(108, 92, 231, 0.06);
  border-radius: 50%;
  pointer-events: none;
}

/* 轨道卡片 */
.sp-orbit-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s;
  position: relative;
}
.sp-orbit-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-glow), transparent);
  opacity: 0;
  transition: opacity 0.4s;
  z-index: 1;
  pointer-events: none;
}
.sp-orbit-card:hover {
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3), 0 0 20px var(--accent-glow);
  transform: translateY(-6px);
}
.sp-orbit-card:hover::before {
  opacity: 1;
}
.sp-orbit-card-img {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
}
.sp-orbit-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}
.sp-orbit-card:hover .sp-orbit-card-img img {
  transform: scale(1.06);
}
.sp-orbit-card-body {
  padding: 18px 20px 22px;
  position: relative;
  z-index: 2;
}
.sp-orbit-card-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 8px;
}
.sp-orbit-card-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sp-orbit-card-excerpt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Spiral Section — 螺旋板块 ===== */
.sp-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 1;
}
.sp-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  padding-top: var(--section-gap);
  position: relative;
}
.sp-section-header::before {
  content: '';
  position: absolute;
  top: calc(var(--section-gap) - 16px);
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  box-shadow: 0 0 10px var(--accent-glow);
}
.sp-section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-light);
  display: flex;
  align-items: center;
  gap: 16px;
}
.sp-section-label::before {
  content: '';
  width: 32px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}
.sp-section-title {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  margin-top: 4px;
}
.sp-section-more {
  font-size: 13px;
  color: var(--accent-light);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}
.sp-section-more:hover { gap: 10px; }
.sp-section-more svg {
  width: 14px;
  height: 14px;
}

/* ===== Spiral Flow — 螺旋流动布局 ===== */
.sp-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ===== Spiral Card — 螺旋卡片 ===== */
.sp-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s;
  position: relative;
}
.sp-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, transparent 50%, var(--accent-glow));
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.sp-card:hover {
  border-color: rgba(108, 92, 231, 0.25);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3), 0 0 16px var(--accent-glow);
  transform: translateY(-4px);
}
.sp-card:hover::after {
  opacity: 1;
}
.sp-card-img {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
}
.sp-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}
.sp-card:hover .sp-card-img img {
  transform: scale(1.05);
}
.sp-card-body {
  padding: 20px 22px 24px;
  position: relative;
  z-index: 2;
}
.sp-card-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 10px;
}
.sp-card-title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.2px;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sp-card-excerpt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Horizontal Scroll Band — 螺旋展示带 ===== */
.sp-band {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.sp-band::-webkit-scrollbar { height: 4px; }
.sp-band::-webkit-scrollbar-track { background: transparent; }
.sp-band::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 2px;
}
.sp-band .sp-card {
  flex-shrink: 0;
  width: 340px;
  scroll-snap-align: start;
}

/* ===== Spiral Divider — 螺旋分隔 ===== */
.sp-divider {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 1;
}
.sp-divider-line {
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--border-strong) 15%,
    var(--accent-glow) 50%,
    var(--border-strong) 85%,
    transparent 100%
  );
  position: relative;
}
.sp-divider-line::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ===== Spiral Path — 螺旋路径装饰 ===== */
.sp-path {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 1;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sp-path-line {
  width: 200px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent2), transparent);
  border-radius: 1px;
  position: relative;
}
.sp-path-line::before,
.sp-path-line::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow);
}
.sp-path-line::before { left: -3px; }
.sp-path-line::after { right: -3px; background: var(--accent2); box-shadow: 0 0 8px var(--accent2-glow); }

/* ===== Ad Slot ===== */
.sp-ad-slot {
  text-align: center;
  padding: 16px;
  display: flex;
  justify-content: center;
}

/* ===== Footer — 螺旋页脚 ===== */
.sp-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  margin-top: var(--section-gap);
  position: relative;
  z-index: 1;
}
.sp-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent2), transparent);
}
.sp-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 40px 32px;
}
.sp-footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.sp-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.sp-footer-brand-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
}
.sp-footer-brand-text {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.sp-footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}
.sp-footer-heading {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.sp-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sp-footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  position: relative;
  padding-left: 0;
}
.sp-footer-links a:hover {
  color: var(--accent-light);
  padding-left: 8px;
}
.sp-footer-links a::before {
  content: '→';
  position: absolute;
  left: -14px;
  opacity: 0;
  transition: all 0.2s;
  color: var(--accent);
}
.sp-footer-links a:hover::before {
  opacity: 1;
  left: 0;
}
.sp-footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Reveal Animation ===== */
.sp-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.sp-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .sp-hero-card-inner {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .sp-hero-card-img {
    aspect-ratio: 16/9;
  }
  .sp-hero-card-img::after {
    background: linear-gradient(180deg, transparent 50%, var(--bg-card) 100%);
  }
  .sp-orbit-ring {
    grid-template-columns: repeat(2, 1fr);
  }
  .sp-flow {
    grid-template-columns: repeat(2, 1fr);
  }
  .sp-nav-inner { padding: 0 24px; }
  .sp-hero, .sp-orbit, .sp-section, .sp-divider, .sp-path { padding-left: 24px; padding-right: 24px; }
  .sp-footer-inner { padding: 48px 24px 28px; }
}

@media (max-width: 768px) {
  .sp-nav-links { display: none; }
  .sp-mobile-menu-btn { display: flex; }
  .sp-hero-card-inner { min-height: auto; }
  .sp-hero-card-body { padding: 28px 24px; }
  .sp-hero-card-title { font-size: 24px; }
  .sp-orbit-ring {
    grid-template-columns: 1fr;
  }
  .sp-flow {
    grid-template-columns: 1fr;
  }
  .sp-band .sp-card { width: 280px; }
  .sp-footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .sp-section-title { font-size: 22px; }
}

@media (max-width: 480px) {
  .sp-hero-card-title { font-size: 20px; }
  .sp-hero-card-body { padding: 20px 18px; }
  .sp-hero, .sp-orbit, .sp-section, .sp-divider, .sp-path { padding-left: 16px; padding-right: 16px; }
  .sp-nav-inner { padding: 0 16px; }
  .sp-footer-inner { padding: 40px 16px 24px; }
}