/* ═══════════════════════════════════════════════════════
   唐门火莲 — 滚动驱动动画版
   灵感：南孚电池国际官网
   ═══════════════════════════════════════════════════════ */
:root {
  --ink: #050505;
  --ink-2: #0a0a0a;
  --paper: #f5f5f7;
  --fire: #e63946;
  --fire-orange: #ff6b35;
  --fire-gold: #f4a261;
  --ember: #c1121f;
  --gold: #c9a227;
  --muted: #86868b;
  --muted-dark: #4a4a4a;
  --transition: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--fire); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── 导航 ───────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px; height: 60px;
  background: rgba(5, 5, 5, 0.5);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid rgba(230, 57, 70, 0.08);
  transition: background 0.4s, border-color 0.4s;
}

.nav.scrolled { background: rgba(5, 5, 5, 0.92); border-color: rgba(230, 57, 70, 0.15); }

.nav-logo {
  font-size: 1rem; font-weight: 700; letter-spacing: 0.15em;
  color: var(--fire); text-decoration: none;
  display: flex; align-items: center; gap: 10px;
}

.nav-logo .logo-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--fire);
  box-shadow: 0 0 12px rgba(230, 57, 70, 0.6);
}

.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 500;
  transition: color 0.3s;
}
.nav-links a:hover { color: var(--paper); }

.nav-cta {
  padding: 8px 18px; border: 1px solid var(--fire); color: var(--fire) !important;
  border-radius: 2px; font-family: 'SF Mono', monospace;
  font-size: 11px; letter-spacing: 1.5px; text-decoration: none;
  transition: all 0.3s;
}
.nav-cta:hover { background: var(--fire); color: #fff !important; }

/* ── 滚动进度条 ──────────────────────────────────────── */
.scroll-progress {
  position: fixed; top: 60px; left: 0; height: 2px; z-index: 999;
  background: linear-gradient(90deg, var(--fire), var(--fire-orange), var(--fire-gold));
  width: 0%; transition: width 0.1s linear;
}

/* ── Hero ────────────────────────────────────────────── */
.hero {
  position: relative; height: 100vh; min-height: 700px;
  display: flex; align-items: center; justify-content: center;
  text-align: center; overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 60%, rgba(230, 57, 70, 0.1) 0%, transparent 60%);
}

/* 火莲花 — 核心视觉 */
.hero-lotus {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 500px; height: 500px;
  pointer-events: none;
}

.lotus-core {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 60px; height: 60px; border-radius: 50%;
  background: radial-gradient(circle, #fff 0%, var(--fire-gold) 30%, var(--fire) 60%, var(--ember) 100%);
  box-shadow: 0 0 80px rgba(230, 57, 70, 0.6), 0 0 160px rgba(255, 107, 53, 0.3), 0 0 300px rgba(230, 57, 70, 0.15);
  animation: corePulse 3s ease-in-out infinite;
  z-index: 5;
}

@keyframes corePulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); box-shadow: 0 0 80px rgba(230, 57, 70, 0.6), 0 0 160px rgba(255, 107, 53, 0.3); }
  50% { transform: translate(-50%, -50%) scale(1.1); box-shadow: 0 0 120px rgba(230, 57, 70, 0.8), 0 0 240px rgba(255, 107, 53, 0.5); }
}

.lotus-ring {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%; border: 1px solid;
  opacity: 0;
  animation: ringExpand 4s ease-out infinite;
}

.lotus-ring:nth-child(2) { width: 100px; height: 100px; border-color: rgba(230, 57, 70, 0.5); animation-delay: 0s; }
.lotus-ring:nth-child(3) { width: 100px; height: 100px; border-color: rgba(255, 107, 53, 0.4); animation-delay: 0.8s; }
.lotus-ring:nth-child(4) { width: 100px; height: 100px; border-color: rgba(244, 162, 97, 0.3); animation-delay: 1.6s; }
.lotus-ring:nth-child(5) { width: 100px; height: 100px; border-color: rgba(230, 57, 70, 0.2); animation-delay: 2.4s; }

@keyframes ringExpand {
  0% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
  100% { transform: translate(-50%, -50%) scale(5); opacity: 0; }
}

.lotus-particles {
  position: absolute; inset: 0;
  animation: lotusRotate 30s linear infinite;
}

.lotus-particle {
  position: absolute;
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--fire-gold);
  box-shadow: 0 0 6px var(--fire);
}

.lotus-particle:nth-child(1) { top: 10%; left: 50%; }
.lotus-particle:nth-child(2) { top: 25%; left: 85%; }
.lotus-particle:nth-child(3) { top: 50%; left: 95%; }
.lotus-particle:nth-child(4) { top: 75%; left: 85%; }
.lotus-particle:nth-child(5) { top: 90%; left: 50%; }
.lotus-particle:nth-child(6) { top: 75%; left: 15%; }
.lotus-particle:nth-child(7) { top: 50%; left: 5%; }
.lotus-particle:nth-child(8) { top: 25%; left: 15%; }

@keyframes lotusRotate { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.hero-content {
  position: relative; z-index: 10; padding: 0 24px;
  opacity: 0; transform: translateY(20px);
  animation: heroReveal 1.2s 0.5s var(--transition) forwards;
}

@keyframes heroReveal { to { opacity: 1; transform: translateY(0); } }

.hero-eyebrow {
  font-family: 'SF Mono', monospace; font-size: 11px;
  letter-spacing: 5px; color: var(--fire); margin-bottom: 20px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(60px, 14vw, 160px); font-weight: 800;
  line-height: 0.9; letter-spacing: 6px; margin-bottom: 6px;
  background: linear-gradient(180deg, #fff 0%, var(--fire-gold) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h2 {
  font-size: clamp(14px, 2vw, 22px); font-weight: 300;
  letter-spacing: 8px; color: var(--muted); margin-bottom: 10px;
  text-transform: uppercase;
}

.hero-desc {
  font-size: clamp(14px, 1.3vw, 16px); color: var(--muted-dark);
  font-weight: 300; max-width: 440px; margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-btn {
  display: inline-block; padding: 16px 40px;
  background: linear-gradient(135deg, var(--fire), var(--fire-orange));
  color: #fff; border: none; border-radius: 2px;
  font-family: 'SF Mono', monospace; font-size: 12px;
  letter-spacing: 3px; font-weight: 600; cursor: pointer;
  text-decoration: none; text-transform: uppercase;
  transition: all 0.3s;
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 48px rgba(230, 57, 70, 0.35); }

.hero-scroll {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  font-family: 'SF Mono', monospace; font-size: 9px; letter-spacing: 3px;
  color: var(--muted-dark); display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  opacity: 0; animation: heroReveal 1s 1.5s var(--transition) forwards;
}

.scroll-line {
  width: 1px; height: 30px;
  background: linear-gradient(var(--fire), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse { 0%, 100% { opacity: 0.3; } 50% { opacity: 1; } }

/* ═══ 滚动驱动Section通用 ═══ */
.scroll-section {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
}

.scroll-section .content {
  max-width: 1200px; margin: 0 auto; padding: 120px 48px;
  width: 100%;
}

.section-label {
  font-family: 'SF Mono', monospace; font-size: 10px;
  letter-spacing: 4px; color: var(--fire); text-transform: uppercase;
  margin-bottom: 16px; display: flex; align-items: center; gap: 12px;
}

.section-label::before {
  content: ''; width: 24px; height: 1px; background: var(--fire);
}

.section-title {
  font-size: clamp(36px, 5vw, 64px); font-weight: 700;
  line-height: 1.1; margin-bottom: 20px;
}

.section-desc {
  font-size: clamp(15px, 1.4vw, 18px); color: var(--muted);
  font-weight: 300; line-height: 1.8; max-width: 560px;
}

/* ── 滚动动画元素 ────────────────────────────────────── */
.sr { /* scroll-reveal */
  opacity: 0; transform: translateY(60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.sr.visible { opacity: 1; transform: translateY(0); }
.sr-delay-1 { transition-delay: 0.1s; }
.sr-delay-2 { transition-delay: 0.2s; }
.sr-delay-3 { transition-delay: 0.3s; }
.sr-delay-4 { transition-delay: 0.4s; }

/* ═══ Section 1: 核心数据 ═══ */
.stats-section {
  background: var(--ink-2);
  border-top: 1px solid rgba(230, 57, 70, 0.06);
  border-bottom: 1px solid rgba(230, 57, 70, 0.06);
}

.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 32px; text-align: center;
}

.stat-item { padding: 40px 20px; }

.stat-number {
  font-size: clamp(48px, 8vw, 80px); font-weight: 800;
  line-height: 1; margin-bottom: 8px;
  background: linear-gradient(180deg, #fff, var(--fire));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-unit { font-size: 0.5em; font-weight: 400; }

.stat-label {
  font-size: 13px; color: var(--muted); letter-spacing: 1px;
}

.stat-bar {
  width: 0; height: 2px; margin: 16px auto 0;
  background: linear-gradient(90deg, transparent, var(--fire), transparent);
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.stat-bar.active { width: 80%; }

/* ═══ Section 2: 武器解构 ═══ */
.deconstruct-section {
  background: var(--ink);
  position: relative;
}

.deconstruct-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}

.weapon-visual {
  position: relative; aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
}

/* 武器SVG图示 */
.weapon-svg {
  width: 100%; max-width: 400px; height: auto;
  opacity: 0;
  transform: scale(0.8) rotate(-10deg);
  transition: opacity 1s, transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.weapon-svg.visible { opacity: 1; transform: scale(1) rotate(0deg); }

.weapon-info { display: flex; flex-direction: column; gap: 32px; }

.weapon-stat {
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.weapon-stat-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}

.weapon-stat-name { font-size: 14px; color: var(--muted); letter-spacing: 1px; }
.weapon-stat-value { font-family: 'SF Mono', monospace; font-size: 13px; color: var(--fire); font-weight: 600; }

.weapon-bar {
  height: 4px; background: rgba(255, 255, 255, 0.06);
  border-radius: 2px; overflow: hidden;
}

.weapon-bar-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--ember), var(--fire), var(--fire-gold));
  border-radius: 2px;
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.weapon-bar-fill.active { /* width set by JS */ }

/* ═══ Section 3: 阵法全息 ═══ */
.formation-section {
  background: var(--ink-2);
  position: relative;
}

.formation-center {
  position: relative; width: 100%; max-width: 600px;
  aspect-ratio: 1; margin: 60px auto 0;
}

.formation-ring {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%; border: 1px solid rgba(230, 57, 70, 0.15);
  opacity: 0; transition: opacity 1s, transform 1s;
}
.formation-ring.visible { opacity: 1; }

.formation-ring:nth-child(1) { width: 120px; height: 120px; }
.formation-ring:nth-child(2) { width: 220px; height: 220px; transition-delay: 0.1s; }
.formation-ring:nth-child(3) { width: 320px; height: 320px; transition-delay: 0.2s; }
.formation-ring:nth-child(4) { width: 420px; height: 420px; transition-delay: 0.3s; }
.formation-ring:nth-child(5) { width: 520px; height: 520px; transition-delay: 0.4s; }
.formation-ring:nth-child(6) { width: 600px; height: 600px; transition-delay: 0.5s; }

.formation-core {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px; border-radius: 50%;
  background: radial-gradient(circle, #fff, var(--fire-gold), var(--fire));
  box-shadow: 0 0 40px rgba(230, 57, 70, 0.5);
  z-index: 5;
}

.formation-node {
  position: absolute;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'SF Mono', monospace; font-size: 11px; font-weight: 600;
  color: var(--fire); letter-spacing: 1px;
  border: 1px solid rgba(230, 57, 70, 0.3);
  border-radius: 8px;
  background: rgba(230, 57, 70, 0.05);
  opacity: 0; transform: scale(0.5);
  transition: opacity 0.6s, transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.formation-node.visible { opacity: 1; transform: scale(1); }

/* 节点位置 */
.formation-node:nth-child(8) { top: 5%; left: 50%; transform: translateX(-50%) scale(0.5); }
.formation-node:nth-child(8).visible { transform: translateX(-50%) scale(1); }
.formation-node:nth-child(9) { top: 20%; right: 8%; }
.formation-node:nth-child(10) { top: 50%; right: 2%; transform: translateY(-50%) scale(0.5); }
.formation-node:nth-child(10).visible { transform: translateY(-50%) scale(1); }
.formation-node:nth-child(11) { bottom: 20%; right: 8%; }
.formation-node:nth-child(12) { bottom: 5%; left: 50%; transform: translateX(-50%) scale(0.5); }
.formation-node:nth-child(12).visible { transform: translateX(-50%) scale(1); }
.formation-node:nth-child(13) { bottom: 20%; left: 8%; }
.formation-node:nth-child(14) { top: 50%; left: 2%; transform: translateY(-50%) scale(0.5); }
.formation-node:nth-child(14).visible { transform: translateY(-50%) scale(1); }
.formation-node:nth-child(15) { top: 20%; left: 8%; }

/* ═══ Section 4: 威力展示 ═══ */
.power-section {
  background: var(--ink);
  position: relative;
}

.power-stages {
  display: flex; flex-direction: column; gap: 0;
  margin-top: 60px;
}

.power-stage {
  display: grid; grid-template-columns: 1fr 1fr;
  min-height: 50vh; align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  position: relative; overflow: hidden;
}

.power-stage:nth-child(even) { direction: rtl; }
.power-stage:nth-child(even) > * { direction: ltr; }

.power-visual {
  padding: 60px; display: flex; align-items: center;
  justify-content: center; position: relative;
}

.power-glyph {
  width: 160px; height: 160px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 48px; font-weight: 800;
  position: relative;
  opacity: 0; transform: scale(0.5);
  transition: opacity 0.8s, transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.power-glyph.visible { opacity: 1; transform: scale(1); }

/* 不同阶段的发光效果 */
.power-stage:nth-child(1) .power-glyph {
  background: radial-gradient(circle, rgba(230, 57, 70, 0.15), transparent 70%);
  color: var(--fire); border: 1px solid rgba(230, 57, 70, 0.3);
  box-shadow: 0 0 60px rgba(230, 57, 70, 0.2);
}
.power-stage:nth-child(2) .power-glyph {
  background: radial-gradient(circle, rgba(255, 107, 53, 0.15), transparent 70%);
  color: var(--fire-orange); border: 1px solid rgba(255, 107, 53, 0.3);
  box-shadow: 0 0 60px rgba(255, 107, 53, 0.2);
}
.power-stage:nth-child(3) .power-glyph {
  background: radial-gradient(circle, rgba(244, 162, 97, 0.15), transparent 70%);
  color: var(--fire-gold); border: 1px solid rgba(244, 162, 97, 0.3);
  box-shadow: 0 0 60px rgba(244, 162, 97, 0.2);
}
.power-stage:nth-child(4) .power-glyph {
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 70%);
  color: #fff; border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 80px rgba(255, 255, 255, 0.15);
}

.power-info { padding: 60px; }

.power-stage-num {
  font-family: 'SF Mono', monospace; font-size: 10px;
  letter-spacing: 3px; color: var(--fire); margin-bottom: 16px;
  opacity: 0; transform: translateX(-20px);
  transition: opacity 0.6s 0.1s, transform 0.6s 0.1s;
}
.power-stage-num.visible { opacity: 1; transform: translateX(0); }

.power-stage-title {
  font-size: clamp(28px, 3.5vw, 44px); font-weight: 700;
  line-height: 1.15; margin-bottom: 16px;
  opacity: 0; transform: translateX(-20px);
  transition: opacity 0.6s 0.2s, transform 0.6s 0.2s;
}
.power-stage-title.visible { opacity: 1; transform: translateX(0); }

.power-stage-desc {
  font-size: 15px; color: var(--muted); line-height: 1.8;
  font-weight: 300; max-width: 420px;
  opacity: 0; transform: translateX(-20px);
  transition: opacity 0.6s 0.3s, transform 0.6s 0.3s;
}
.power-stage-desc.visible { opacity: 1; transform: translateX(0); }

.power-stage-spec {
  margin-top: 24px;
  display: flex; gap: 24px;
  opacity: 0; transform: translateX(-20px);
  transition: opacity 0.6s 0.4s, transform 0.6s 0.4s;
}
.power-stage-spec.visible { opacity: 1; transform: translateX(0); }

.spec-tag {
  padding: 8px 16px;
  border: 1px solid rgba(230, 57, 70, 0.2);
  border-radius: 4px;
  font-family: 'SF Mono', monospace;
  font-size: 11px; letter-spacing: 1px;
  color: var(--fire);
}

/* ═══ Section 5: 性能对比 ═══ */
.compare-section {
  background: var(--ink-2);
}

.compare-visual {
  max-width: 900px; margin: 60px auto 0;
}

.compare-item {
  display: grid; grid-template-columns: 140px 1fr 1fr;
  gap: 24px; align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  opacity: 0; transform: translateX(-30px);
  transition: opacity 0.6s, transform 0.6s;
}
.compare-item.visible { opacity: 1; transform: translateX(0); }

.compare-item:nth-child(2) { transition-delay: 0.05s; }
.compare-item:nth-child(3) { transition-delay: 0.1s; }
.compare-item:nth-child(4) { transition-delay: 0.15s; }
.compare-item:nth-child(5) { transition-delay: 0.2s; }
.compare-item:nth-child(6) { transition-delay: 0.25s; }
.compare-item:nth-child(7) { transition-delay: 0.3s; }

.compare-label { font-size: 14px; color: var(--muted); }

.compare-bar-wrap { display: flex; flex-direction: column; gap: 6px; }

.compare-bar {
  height: 6px; background: rgba(255, 255, 255, 0.04);
  border-radius: 3px; overflow: hidden; position: relative;
}

.compare-bar-fill {
  height: 100%; border-radius: 3px;
  width: 0;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.compare-bar.old .compare-bar-fill { background: var(--muted-dark); }
.compare-bar.new .compare-bar-fill { background: linear-gradient(90deg, var(--fire), var(--fire-gold)); }

.compare-val {
  font-family: 'SF Mono', monospace; font-size: 12px;
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  opacity: 0; transition: opacity 0.5s 1s;
}
.compare-bar-fill.active ~ .compare-val { opacity: 1; }
.compare-bar.old .compare-val { color: var(--muted-dark); }
.compare-bar.new .compare-val { color: var(--fire-gold); }

/* ═══ Section 6: 技术蓝图 ═══ */
.tech-section { background: var(--ink); }

.tech-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 2px; margin-top: 60px;
  background: rgba(230, 57, 70, 0.06);
  border: 1px solid rgba(230, 57, 70, 0.06);
}

.tech-card {
  background: var(--ink); padding: 48px 32px;
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s, transform 0.6s, background 0.3s;
}
.tech-card.visible { opacity: 1; transform: translateY(0); }
.tech-card:hover { background: var(--ink-2); }

.tech-card-icon {
  width: 48px; height: 48px; margin-bottom: 24px;
  border: 1px solid rgba(230, 57, 70, 0.3); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: var(--fire);
}

.tech-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.tech-card p { font-size: 13.5px; color: var(--muted); line-height: 1.75; font-weight: 300; }

/* ═══ Section 7: CTA ═══ */
.cta-section {
  background: var(--ink);
  text-align: center;
  position: relative;
}

.cta-section::before {
  content: ''; position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.06), transparent 70%);
  pointer-events: none;
}

.cta-inner { position: relative; z-index: 1; }

.cta-inner h2 {
  font-size: clamp(32px, 5vw, 56px); font-weight: 700;
  margin-bottom: 18px;
}

.cta-inner p {
  color: var(--muted); font-size: 16px; max-width: 460px;
  margin: 0 auto 36px; line-height: 1.7; font-weight: 300;
}

.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }

.cta-contact { padding-top: 40px; border-top: 1px solid rgba(255, 255, 255, 0.04); }
.cta-contact p { color: var(--muted); font-size: 14px; }
.cta-contact a { color: var(--fire); text-decoration: none; font-weight: 500; }
.cta-contact a:hover { color: var(--fire-orange); }

/* ── 页脚 ────────────────────────────────────────────── */
footer {
  padding: 36px 48px; background: #030303;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
footer p { color: var(--muted-dark); font-size: 0.7rem; letter-spacing: 0.5px; }
footer a { color: var(--fire); text-decoration: none; }

/* ── 响应式 ──────────────────────────────────────────── */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .deconstruct-grid { grid-template-columns: 1fr; gap: 40px; }
  .power-stage { grid-template-columns: 1fr; }
  .power-stage:nth-child(even) { direction: ltr; }
  .power-visual { padding: 40px; }
  .power-info { padding: 40px; }
  .tech-grid { grid-template-columns: 1fr; }
  .compare-item { grid-template-columns: 100px 1fr; }
  .compare-item > :nth-child(3) { display: none; }
  .formation-center { max-width: 360px; }
}

@media (max-width: 560px) {
  .scroll-section .content { padding: 80px 20px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
}