/* ================================================================
   MOLLY LED 立方体 — 产品宣传网站 全局样式
   继承项目暗黑+绿色设计体系，适配产品站场景
   美化版：增强视觉层次、动画效果、玻璃拟态、发光质感
   ================================================================ */

:root {
  --bg: #010101;
  --bg-gradient: radial-gradient(ellipse at top, #0a1a0e 0%, #010101 50%);
  --surface: #1c1c1e;
  --surface2: #39383d;
  --surface-glass: rgba(28, 28, 30, 0.72);
  --border: #242426;
  --border-glow: rgba(31, 139, 64, 0.3);
  --text: #ffffff;
  --text2: #9d9d9f;
  --primary: #1f8b40;
  --primary-light: #2fd159;
  --primary-dim: #15602c;
  --primary-glow: rgba(47, 209, 89, 0.25);
  --accent: #ff4539;
  --accent2: #2fd159;
  --radius: 12px;
  --radius-lg: 16px;
  --max-width: 1000px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(31, 139, 64, 0.15);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text); line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 全局背景装饰 - 微妙的网格线 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(31, 139, 64, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 139, 64, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent2); text-shadow: 0 0 8px var(--primary-glow); }

/* 选中文字样式 */
::selection {
  background: var(--primary);
  color: #fff;
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { 
  background: linear-gradient(180deg, var(--primary-dim), var(--primary)); 
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

/* ===== 导航栏 ===== */
.nav { position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 60px;
  background: rgba(1, 1, 1, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(31, 139, 64, 0.15);
  box-shadow: 0 1px 20px rgba(0,0,0,0.3);
  transition: all var(--transition-base);
}
.nav::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.6;
}
.nav-logo { display: flex; align-items: center; gap: 10px; transition: transform var(--transition-fast); }
.nav-logo:hover { transform: scale(1.02); }
.nav-logo img { height: 32px; filter: drop-shadow(0 0 8px var(--primary-glow)); }
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a { display: block; padding: 8px 16px; border-radius: 8px;
  font-size: 13px; font-weight: 500; color: var(--text2); 
  transition: all var(--transition-fast);
  position: relative;
}
.nav-links a:hover { 
  color: var(--text); 
  background: rgba(31, 139, 64, 0.1);
  box-shadow: inset 0 0 0 1px rgba(31, 139, 64, 0.2);
}
.nav-links a.active { 
  color: var(--primary-light); 
  background: rgba(31, 139, 64, 0.12);
  box-shadow: inset 0 0 0 1px rgba(31, 139, 64, 0.25);
  text-shadow: 0 0 10px var(--primary-glow);
}
.nav-toggle { display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
  border-radius: 6px;
  transition: background var(--transition-fast);
}
.nav-toggle:hover { background: var(--surface); }
.nav-toggle span { display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px; transition: all var(--transition-base); }

/* ===== 通用布局 ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding-left: 24px; padding-right: 24px; position: relative; z-index: 1; }
section { padding-top: 96px; padding-bottom: 96px; position: relative; }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  overflow: hidden; padding: 0 24px 80px; text-align: center; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-bg .dot { position: absolute; width: 4px; height: 4px; border-radius: 50%;
  background: var(--primary-light); 
  box-shadow: 0 0 6px var(--primary-light), 0 0 12px var(--primary-glow);
  opacity: 0; animation: dotPulse var(--d) infinite; }
@keyframes dotPulse {
  0%, 100% { opacity: 0; transform: scale(0); }
  30% { opacity: .4; }
  50% { opacity: .8; transform: scale(1.2); }
  70% { opacity: .3; }
}
@media (prefers-reduced-motion: reduce) { .hero-bg { display: none; } html { scroll-behavior: auto; } }
.hero-content { position: relative; z-index: 1; max-width: 760px; margin-top: -280px; }

/* Hero 光晕效果 */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(31, 139, 64, 0.12) 0%, transparent 70%);
  pointer-events: none;
  animation: heroGlow 6s ease-in-out infinite;
}
@keyframes heroGlow {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

/* 居中大 LOGO */
.hero-logo { 
  width: 280px; height: auto; margin: 0 auto 40px;
  filter: drop-shadow(0 0 30px var(--primary-glow)) drop-shadow(0 0 60px rgba(31, 139, 64, 0.1));
  animation: logoFloat 4s ease-in-out infinite;
}
@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero .tagline { font-size: 16px; color: var(--text2); line-height: 1.8;
  max-width: 620px; margin: 0 auto 40px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; border: none; border-radius: 10px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all var(--transition-base); 
  text-decoration: none; white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s;
}
.btn:hover::before {
  left: 100%;
}
.btn-primary { 
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dim) 100%);
  color: #fff; 
  box-shadow: 0 4px 15px rgba(31, 139, 64, 0.3), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover { 
  background: linear-gradient(135deg, #25a04c 0%, var(--primary) 100%);
  color: #fff; 
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(31, 139, 64, 0.4), 0 0 30px var(--primary-glow), inset 0 1px 0 rgba(255,255,255,0.15);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(31, 139, 64, 0.3), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-outline { 
  background: rgba(28, 28, 30, 0.6); 
  color: var(--text); 
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.btn-outline:hover { 
  border-color: var(--primary); 
  color: var(--primary-light); 
  background: rgba(31, 139, 64, 0.08);
  box-shadow: 0 0 20px var(--primary-glow), inset 0 0 20px rgba(31, 139, 64, 0.05);
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(0);
}

/* ====== 产品画廊 — 连续横向滚动（Apple "Take a closer look" 风格） ====== */
.product-gallery { padding: 0 0 96px 0; position: relative; z-index: 1; }
.product-gallery:first-of-type { padding-top: 0; }
.hw-title { 
  text-align: left; 
  font-size: 28px; 
  font-weight: 300; 
  letter-spacing: 3px;
  margin-bottom: 32px; 
  padding: 0 24px;
  position: relative;
}
.hw-title span { 
  color: var(--primary-light); 
  font-weight: 500;
  text-shadow: 0 0 20px var(--primary-glow);
}
.hw-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), transparent);
  margin-top: 12px;
  border-radius: 1px;
}

.pg-scroll { 
  display: flex; gap: 16px; overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 24px 16px; position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-dim) transparent;
}
.pg-scroll::-webkit-scrollbar { height: 6px; }
.pg-scroll::-webkit-scrollbar-track { background: transparent; }
.pg-scroll::-webkit-scrollbar-thumb { 
  background: linear-gradient(90deg, var(--primary-dim), var(--primary)); 
  border-radius: 3px;
}
.pg-scroll::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }
.pg-scroll img { 
  scroll-snap-align: start; flex-shrink: 0;
  max-height: 75vh; max-width: 90vw; width: auto; height: auto; 
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.05);
  transition: all var(--transition-base);
}
.pg-scroll img:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 50px rgba(0,0,0,0.6), 0 0 40px var(--primary-glow);
}

/* 圆点导航 */
.pg-dots { display: flex; justify-content: center; align-items: center; gap: 10px;
  padding: 20px 0 0; }

.pg-dot { width: 10px; height: 10px; border-radius: 50%; border: none;
  background: rgba(255,255,255,0.25); cursor: pointer; padding: 0;
  transition: all var(--transition-base); 
  position: relative;
}
.pg-dot:hover { 
  background: rgba(255,255,255,0.6); 
  transform: scale(1.2);
}
.pg-dot.active { 
  background: var(--primary-light); 
  box-shadow: 0 0 10px var(--primary-light), 0 0 20px var(--primary-glow);
  transform: scale(1.3);
}

.pg-play-btn { width: 24px; height: 24px; border: none;
  background: rgba(255,255,255,0.05); 
  color: rgba(255,255,255,0.5);
  border-radius: 6px;
  cursor: pointer; font-size: 12px; line-height: 24px; padding: 0;
  transition: all var(--transition-fast); flex-shrink: 0; margin-left: 12px; }
.pg-play-btn:hover { 
  color: var(--primary-light); 
  background: rgba(31, 139, 64, 0.1);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* ===== 产品亮点 — Apple "Get the highlights" 风格 ===== */
.highlights-section {
  padding: 120px 0 80px;
  position: relative;
  z-index: 1;
}

.highlights-title {
  font-size: 48px;
  font-weight: 200;
  letter-spacing: -1px;
  margin-bottom: 40px;
  text-align: left;
}
.highlights-title span {
  background: linear-gradient(135deg, var(--primary-light), #4ade80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 30px var(--primary-glow));
}

/* 卡片横向滚动 */
.highlights-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 20px 0 40px;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
}
.highlights-scroll:active {
  cursor: grabbing;
}
.highlights-scroll::-webkit-scrollbar {
  display: none;
}

/* 首尾占位 — (视口 - 卡片实际宽度) / 2，用 min 处理 max-width 截断 */
.hl-spacer {
  flex-shrink: 0;
  width: calc((100% - min(90vw, 1300px)) / 2);
}

.highlight-card {
  flex-shrink: 0;
  width: 90vw;
  max-width: 1300px;
  scroll-snap-align: center;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.highlight-card-inner {
  background: #000;
  border-radius: 28px;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  display: flex;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
  transition: all var(--transition-base);
}

.highlight-card:hover .highlight-card-inner {
  transform: translateY(-4px);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 40px var(--primary-glow), 0 0 0 1px rgba(31, 139, 64, 0.2);
}

/* 底部控制器 — 胶囊样式 */
.highlights-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}

.highlights-dots {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(28, 28, 30, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hl-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  padding: 0;
  transition: all var(--transition-base);
}

.hl-dot:hover {
  background: rgba(255,255,255,0.6);
  transform: scale(1.2);
}

.hl-dot.active {
  background: var(--primary-light);
  width: 24px;
  border-radius: 4px;
  box-shadow: 0 0 10px var(--primary-light), 0 0 20px var(--primary-glow);
}

.hl-play-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(28, 28, 30, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hl-play-btn:hover {
  background: rgba(31, 139, 64, 0.2);
  border-color: rgba(31, 139, 64, 0.3);
  color: var(--primary-light);
  box-shadow: 0 0 20px var(--primary-glow);
}

.hl-play-btn svg {
  transition: all var(--transition-fast);
}

@media (max-width: 768px) {
  .hl-spacer { width: calc((100% - min(88vw, 1300px)) / 2); }
  .highlight-card { width: 88vw; }
}

@media (max-width: 480px) {
  .hl-spacer { width: calc((100% - min(92vw, 1300px)) / 2); }
  .highlight-card { width: 92vw; }
}

/* ===== Performance：宽自适应 + 高统一 + JS居中（不用CSS snap） ===== */
#perf-section .highlights-scroll { scroll-snap-type: none; }
#perf-section .hl-spacer { width: 200px; }
#perf-section .highlight-card {
  width: auto;
  max-width: none;
  scroll-snap-align: none;
}
#perf-section .highlight-card-inner {
  height: 60vw;
  max-height: 867px;  /* = 1300 * 2/3，和 PRO 卡片高度一致 */
  aspect-ratio: auto;
}
@media (max-width: 768px) {
  #perf-section .hl-spacer { width: 80px; }
  #perf-section .highlight-card-inner { height: 58vw; max-height: none; }
  /* 手机端 Performance 24个圆点太长 → 上下两行 */
  #perf-section .highlights-controls { flex-direction: column; gap: 12px; }
  #perf-section .highlights-dots { flex-wrap: wrap; justify-content: center; max-width: 400px; }
}
@media (max-width: 480px) {
  #perf-section .hl-spacer { width: 40px; }
  #perf-section .highlight-card-inner { height: 61vw; max-height: none; }
}

/* ===== 区域标题 ===== */
.section-header { text-align: center; margin-bottom: 64px; position: relative; }
.section-header h2 { 
  font-size: 36px; font-weight: 700; margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-header h2 span { 
  color: var(--primary-light); 
  background: linear-gradient(135deg, var(--primary-light), #4ade80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px var(--primary-glow));
}
.section-header p { font-size: 15px; color: var(--text2); max-width: 560px; margin: 0 auto; line-height: 1.7; }

/* 标题装饰线 */
.section-header::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  margin: 20px auto 0;
  border-radius: 2px;
}

/* ===== 卡片 ===== */
.card { 
  background: var(--surface-glass); 
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-lg); 
  overflow: hidden; 
  transition: all var(--transition-base); 
  position: relative;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(31, 139, 64, 0), rgba(31, 139, 64, 0));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: all var(--transition-base);
  pointer-events: none;
}
.card:hover { 
  border-color: rgba(31, 139, 64, 0.3); 
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.card:hover::before {
  background: linear-gradient(135deg, rgba(31, 139, 64, 0.3), rgba(31, 139, 64, 0.1));
}
.card-body { padding: 32px 28px; position: relative; z-index: 1; }
.card-icon { font-size: 36px; margin-bottom: 16px; filter: drop-shadow(0 0 10px var(--primary-glow)); }
.card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.2px; }
.card p { font-size: 14px; color: var(--text2); line-height: 1.7; }

/* ===== 网格 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

/* ===== 功能/模式展示 ===== */
.feature-block { display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center; margin-bottom: 96px; }
.feature-block:last-child { margin-bottom: 0; }
.feature-block.reverse { direction: rtl; }
.feature-block.reverse > * { direction: ltr; }
.feature-text h3 { 
  font-size: 28px; font-weight: 700; margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.feature-text h3 span { 
  color: var(--primary-light); 
  background: linear-gradient(135deg, var(--primary-light), #4ade80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.feature-text p { font-size: 15px; color: var(--text2); line-height: 1.8; margin-bottom: 16px; }
.feature-text ul { list-style: none; }
.feature-text li { font-size: 14px; color: var(--text2); padding: 6px 0;
  padding-left: 22px; position: relative;
  transition: all var(--transition-fast);
}
.feature-text li:hover {
  color: var(--text);
  transform: translateX(4px);
}
.feature-text li::before { 
  content: ''; position: absolute; left: 0; top: 13px;
  width: 8px; height: 8px; border-radius: 50%; 
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
  transition: all var(--transition-fast);
}
.feature-text li:hover::before {
  background: var(--primary-light);
  box-shadow: 0 0 12px var(--primary-light);
  transform: scale(1.2);
}
.feature-img { 
  border-radius: var(--radius-lg); 
  overflow: hidden;
  border: 1px solid var(--border); 
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}
.feature-img:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 50px rgba(0,0,0,0.6), 0 0 40px var(--primary-glow);
  border-color: rgba(31, 139, 64, 0.3);
}
.feature-img img { width: 100%; }

/* ===== 规格表 ===== */
.spec-section { margin-bottom: 56px; }
.spec-section h3 { 
  font-size: 20px; font-weight: 600; margin-bottom: 20px; 
  color: var(--primary-light);
  display: flex;
  align-items: center;
  gap: 12px;
}
.spec-section h3::before {
  content: '';
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, var(--primary-light), var(--primary));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--primary-glow);
}
.spec-table { 
  width: 100%; border-collapse: separate; border-spacing: 0;
  font-size: 14px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-glass);
  backdrop-filter: blur(10px);
}
.spec-table th, .spec-table td { padding: 14px 20px; text-align: left;
  border-bottom: 1px solid var(--border); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }
.spec-table th { 
  color: var(--text2); font-weight: 500; width: 180px; white-space: nowrap;
  background: rgba(31, 139, 64, 0.05);
  font-weight: 600;
}
.spec-table td { color: var(--text); }
.spec-table tr:hover td {
  background: rgba(31, 139, 64, 0.03);
}

/* ===== 教程 ===== */
.guide-step { 
  display: flex; gap: 24px; margin-bottom: 40px;
  position: relative;
  padding-left: 8px;
}
.guide-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 19px;
  top: 48px;
  bottom: -20px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), transparent);
  opacity: 0.3;
}
.guide-step-num { 
  flex-shrink: 0; width: 42px; height: 42px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dim)); 
  color: #fff; display: flex; align-items: center;
  justify-content: center; font-size: 16px; font-weight: 700;
  box-shadow: 0 4px 15px var(--primary-glow), inset 0 1px 0 rgba(255,255,255,0.2);
  position: relative;
  z-index: 1;
}
.guide-step-body h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.guide-step-body p { font-size: 14px; color: var(--text2); line-height: 1.7; }
.guide-tip { 
  background: var(--surface-glass); 
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary-light); 
  border-radius: 8px; padding: 16px 20px;
  margin: 20px 0; font-size: 13px; color: var(--text2);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.guide-tip::before {
  content: '💡';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
}

/* ===== 联系方式 ===== */
.contact-card { text-align: center; }
.contact-card .card-icon { font-size: 44px; margin-bottom: 16px; }
.contact-card h3 { font-size: 18px; margin: 12px 0 8px; }
.contact-links { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.contact-links a { 
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 24px; 
  background: linear-gradient(135deg, var(--surface2), var(--surface));
  border: 1px solid var(--border);
  border-radius: 10px; font-size: 14px; font-weight: 500; color: var(--text);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.contact-links a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
  transition: left 0.5s;
}
.contact-links a:hover::before {
  left: 100%;
}
.contact-links a:hover { 
  background: linear-gradient(135deg, var(--primary), var(--primary-dim));
  color: #fff; 
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--primary-glow);
}

/* ===== 页脚 ===== */
footer { 
  border-top: 1px solid var(--border); 
  padding: 40px 24px; text-align: center;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(10px);
  position: relative;
  z-index: 1;
}
footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.4;
}
footer p { font-size: 13px; color: var(--text2); }
footer .footer-links { display: flex; justify-content: center; gap: 24px;
  margin-bottom: 16px; flex-wrap: wrap; }
footer .footer-links a { 
  font-size: 13px; color: var(--text2);
  transition: all var(--transition-fast);
  position: relative;
}
footer .footer-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary-light);
  transition: width var(--transition-base);
}
footer .footer-links a:hover { 
  color: var(--primary-light); 
  text-shadow: 0 0 8px var(--primary-glow);
}
footer .footer-links a:hover::after {
  width: 100%;
}

/* ===== 淡入动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header, .card, .feature-block, .spec-section, .guide-step {
  animation: fadeInUp 0.6s ease-out both;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav-links { display: none; position: fixed; top: 60px; left: 0; right: 0;
    background: rgba(28, 28, 30, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 12px; gap: 4px; z-index: 99; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 18px; font-size: 15px; }
  .nav-toggle { display: flex; }
  .hero { min-height: 100svh; padding: 100px 20px 80px; }
  .hero-content { margin-top: -56px; }
  .hero-logo { width: 200px; margin-bottom: 28px; }
  .hero .tagline { font-size: 15px; }
  .hw-title { font-size: 22px; padding: 0 20px; }
  .highlights-title { font-size: 32px; margin-bottom: 28px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .feature-block { grid-template-columns: 1fr; gap: 32px; }
  .feature-block.reverse { direction: ltr; }
  section { padding-top: 64px; padding-bottom: 64px; }
  .section-header h2 { font-size: 28px; }
  .section-header { margin-bottom: 48px; }
  .spec-table th { width: 120px; }
  .card-body { padding: 24px 20px; }
  .feature-text h3 { font-size: 22px; }
}

@media (max-width: 480px) {
  .nav { padding: 0 16px; }
  .container { padding-left: 16px; padding-right: 16px; }
  .hero { min-height: 100svh; padding: 90px 16px 60px; }
  .hero-content { margin-top: -56px; }
  .hero-logo { width: 160px; margin-bottom: 24px; }
  .hero .tagline { font-size: 14px; }
  .btn { padding: 12px 24px; font-size: 13px; }
  .card-body { padding: 20px 16px; }
  section { padding-top: 48px; padding-bottom: 48px; }
  .section-header h2 { font-size: 24px; }
  .section-header { margin-bottom: 36px; }
  .highlights-title { font-size: 26px; margin-bottom: 22px; }
  .spec-table th { width: 100px; font-size: 12px; padding: 12px 14px; }
  .spec-table td { font-size: 13px; padding: 12px 14px; }
  .guide-step { gap: 16px; }
  .guide-step-num { width: 36px; height: 36px; font-size: 14px; }
  .hw-title { font-size: 20px; margin-bottom: 20px; padding: 0 16px; }
  .pg-dot { width: 8px; height: 8px; }
  .pg-scroll { padding: 8px 16px 12px; gap: 12px; }
}