/* ==========================================================================
   Tomcat - 动漫视觉深度设计系统 (Layer 1.5 Anime Theme)
   设计主题：【空岛结界 · 逆行魔导阵与赤枫星流 (Sky Sanctuary · Mystic Circles & Scarlet Maple Stream)】
   视觉哲学：玄青苍穹背景 · 纯CSS/SVG双环逆行魔法阵 · 飘落赤枫微粒 · 磨砂水晶玻璃态 · 高转化发光组件
   ========================================================================== */

:root {
  /* 基础底色与界面层级 */
  --bg-deep: #070b14;
  --bg-void: #0b1220;
  --bg-surface: rgba(14, 23, 40, 0.78);
  --bg-surface-hover: rgba(22, 36, 62, 0.88);
  --bg-card: rgba(15, 26, 46, 0.72);
  --bg-card-featured: rgba(18, 32, 60, 0.88);
  --bg-glow-subtle: rgba(56, 189, 248, 0.06);

  /* 文字配色层级 */
  --text-pure: #ffffff;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  /* 动漫与魔法阵核心色彩 */
  --color-cyan: #38bdf8;
  --color-cyan-glow: rgba(56, 189, 248, 0.35);
  --color-azure: #2563eb;
  --color-indigo: #6366f1;
  --color-maple: #f43f5e;
  --color-maple-glow: rgba(244, 63, 94, 0.35);
  --color-gold: #fbbf24;
  --color-gold-glow: rgba(251, 191, 36, 0.35);
  --color-success: #34d399;

  /* 边框与微光反射 */
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-glow: rgba(56, 189, 248, 0.32);
  --border-gold: rgba(251, 191, 36, 0.45);
  --border-maple: rgba(244, 63, 94, 0.4);

  /* 阴影体系 */
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --shadow-glow-cyan: 0 0 28px rgba(56, 189, 248, 0.22);
  --shadow-glow-gold: 0 0 32px rgba(251, 191, 36, 0.25);
  --shadow-glow-maple: 0 0 28px rgba(244, 63, 94, 0.25);

  /* 几何半径与尺寸 */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --max-width: 1180px;
  --header-height: 72px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(circle at 18% 12%, rgba(37, 99, 235, 0.14) 0%, transparent 48%),
    radial-gradient(circle at 82% 40%, rgba(244, 63, 94, 0.08) 0%, transparent 52%),
    radial-gradient(circle at 50% 85%, rgba(56, 189, 248, 0.1) 0%, transparent 55%);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
  padding-bottom: 78px;
}

@media (min-width: 769px) {
  body {
    padding-bottom: 0;
  }
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

a:hover {
  color: #7dd3fc;
  text-shadow: 0 0 12px var(--color-cyan-glow);
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   动态背景素材层：赤枫叶片飘落与星芒微尘
   ========================================================================== */
.astral-drift-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* 赤枫叶片造型与轨迹 */
.maple-leaf {
  position: absolute;
  top: -40px;
  width: 22px;
  height: 22px;
  opacity: 0.68;
  filter: drop-shadow(0 0 8px rgba(244, 63, 94, 0.4));
  animation: mapleFall linear infinite;
  transform-origin: center center;
}

.maple-leaf svg {
  width: 100%;
  height: 100%;
  fill: #f43f5e;
}

.leaf-1 { left: 8%; animation-duration: 17s; animation-delay: 0s; transform: scale(0.9); }
.leaf-2 { left: 24%; animation-duration: 21s; animation-delay: 4s; transform: scale(0.75); }
.leaf-3 { left: 45%; animation-duration: 19s; animation-delay: 8s; transform: scale(1.1); }
.leaf-4 { left: 68%; animation-duration: 23s; animation-delay: 2s; transform: scale(0.85); }
.leaf-5 { left: 86%; animation-duration: 18s; animation-delay: 11s; transform: scale(1); }
.leaf-6 { left: 94%; animation-duration: 25s; animation-delay: 5s; transform: scale(0.7); }

@keyframes mapleFall {
  0% {
    top: -40px;
    transform: translateX(0) rotate(0deg) rotateY(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.75;
  }
  50% {
    transform: translateX(65px) rotate(180deg) rotateY(180deg);
  }
  90% {
    opacity: 0.65;
  }
  100% {
    top: 105vh;
    transform: translateX(-40px) rotate(360deg) rotateY(360deg);
    opacity: 0;
  }
}

/* 星芒与金尘微粒 */
.star-dust {
  position: absolute;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 10px var(--color-gold-glow);
  opacity: 0.45;
  animation: dustPulse ease-in-out infinite alternate;
}

.dust-1 { top: 22%; left: 16%; width: 4px; height: 4px; animation-duration: 3.2s; }
.dust-2 { top: 48%; left: 78%; width: 3px; height: 3px; animation-duration: 4.5s; }
.dust-3 { top: 68%; left: 32%; width: 5px; height: 5px; animation-duration: 3.8s; }
.dust-4 { top: 82%; left: 88%; width: 3px; height: 3px; animation-duration: 5.1s; }

@keyframes dustPulse {
  0% { opacity: 0.2; transform: scale(0.8); }
  100% { opacity: 0.85; transform: scale(1.4); }
}

/* ==========================================================================
   顶部导航栏（空岛悬浮透明磨砂态）
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-pure);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.brand-logo-icon {
  position: relative;
  width: 36px;
  height: 36px;
}

.brand-logo-icon img {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 8px var(--color-cyan-glow));
}

.brand-logo-txt {
  display: flex;
  flex-direction: column;
}

.brand-name {
  line-height: 1.1;
  background: linear-gradient(135deg, #ffffff 40%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 22px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.94rem;
  font-weight: 500;
  position: relative;
  padding: 6px 2px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-maple));
  transition: all 0.25s ease;
  transform: translateX(-50%);
  border-radius: var(--radius-full);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 22px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff !important;
  background: linear-gradient(135deg, #2563eb, #0284c7 60%, #38bdf8);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.25s ease;
}

.header-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px var(--color-cyan-glow);
  color: #ffffff !important;
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  color: var(--text-main);
  transition: all 0.2s ease;
}

.menu-toggle:hover {
  border-color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.1);
}

@media (min-width: 920px) {
  .nav-links {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
}

/* 移动端弹出抽屉 */
.mobile-drawer {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(9, 15, 28, 0.96);
  border-bottom: 1px solid var(--border-glow);
  padding: 20px 24px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(20px);
}

.mobile-drawer.open {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-drawer a {
  color: var(--text-main);
  font-size: 1.05rem;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-drawer a:last-child {
  border-bottom: none;
}

/* ==========================================================================
   高转化 CTA 按钮设计系统
   ========================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #2563eb 0%, #0284c7 45%, #38bdf8 100%);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 1.02rem;
  padding: 14px 34px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.42), 0 0 18px rgba(56, 189, 248, 0.28);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  z-index: 1;
}

/* 扫光动效 */
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 80%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-25deg);
  transition: none;
  animation: btnSheen 3.6s infinite;
}

@keyframes btnSheen {
  0% { left: -120%; }
  30% { left: 140%; }
  100% { left: 140%; }
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(37, 99, 235, 0.58), 0 0 28px var(--color-cyan-glow);
  border-color: rgba(255, 255, 255, 0.6);
  color: #ffffff !important;
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.4);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: rgba(15, 26, 46, 0.65);
  color: var(--text-pure) !important;
  font-weight: 600;
  font-size: 1.02rem;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-outline:hover {
  border-color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.12);
  color: var(--color-cyan) !important;
  box-shadow: 0 0 16px var(--color-cyan-glow);
  transform: translateY(-2px);
}

/* 点击波纹涟漪容器 */
.btn-ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: rippleFx 0.6s linear;
  background-color: rgba(255, 255, 255, 0.45);
  pointer-events: none;
}

@keyframes rippleFx {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ==========================================================================
   Hero 主视觉区（动漫双栏：左文案价值 + 右逆行魔导阵终端）
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 72px 0 64px;
  z-index: 2;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 6px 16px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-cyan);
  margin-bottom: 22px;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.15);
}

@media (max-width: 960px) {
  .hero-badge-pill {
    align-self: center;
  }
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-maple);
  box-shadow: 0 0 8px var(--color-maple);
  animation: pulseBeacon 1.8s infinite;
}

@keyframes pulseBeacon {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
  font-size: 2.85rem;
  line-height: 1.22;
  font-weight: 800;
  color: var(--text-pure);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-title-accent {
  background: linear-gradient(135deg, #38bdf8 10%, #60a5fa 50%, #f43f5e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 24px rgba(56, 189, 248, 0.3);
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2rem;
  }
}

.hero-subtitle {
  font-size: 1.12rem;
  line-height: 1.68;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 620px;
}

@media (max-width: 960px) {
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

@media (max-width: 960px) {
  .hero-actions {
    justify-content: center;
  }
}

.hero-stats-deck {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.stat-box {
  background: rgba(15, 26, 46, 0.45);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  text-align: left;
}

@media (max-width: 960px) {
  .stat-box {
    text-align: center;
  }
}

.stat-value {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-pure);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stat-cyan { color: var(--color-cyan); text-shadow: 0 0 12px var(--color-cyan-glow); }
.stat-maple { color: var(--color-maple); text-shadow: 0 0 12px var(--color-maple-glow); }
.stat-gold { color: var(--color-gold); text-shadow: 0 0 12px var(--color-gold-glow); }

.stat-title {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

@media (max-width: 580px) {
  .hero-stats-deck {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Hero 右侧：魔导共鸣核心终端与逆行双环魔法阵
   ========================================================================== */
.hero-rune-console {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.magic-circle-container {
  position: relative;
  width: 380px;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 480px) {
  .magic-circle-container {
    width: 300px;
    height: 300px;
  }
}

/* 外环魔法阵：逆时针转 */
.magic-circle-outer {
  position: absolute;
  width: 100%;
  height: 100%;
  animation: rotateOuter 38s linear infinite;
  opacity: 0.75;
}

@keyframes rotateOuter {
  from { transform: rotate(0deg); }
  to { transform: rotate(-360deg); }
}

/* 内环魔法阵：顺时针转 */
.magic-circle-inner {
  position: absolute;
  width: 78%;
  height: 78%;
  animation: rotateInner 24s linear infinite;
  opacity: 0.85;
}

@keyframes rotateInner {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 核心水晶光球与实时监测状态卡 */
.magic-core-card {
  position: absolute;
  width: 210px;
  padding: 18px 16px;
  background: rgba(11, 20, 36, 0.88);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.3), inset 0 0 16px rgba(56, 189, 248, 0.12);
  backdrop-filter: blur(12px);
  text-align: center;
  z-index: 10;
}

.core-pulse-orb {
  width: 46px;
  height: 46px;
  margin: 0 auto 10px;
  border-radius: 50%;
  background: radial-gradient(circle, #38bdf8 0%, #2563eb 60%, transparent 80%);
  box-shadow: 0 0 20px #38bdf8;
  animation: coreGlow 2.4s ease-in-out infinite alternate;
}

@keyframes coreGlow {
  0% { transform: scale(0.9); box-shadow: 0 0 12px #38bdf8; }
  100% { transform: scale(1.15); box-shadow: 0 0 32px #38bdf8, 0 0 48px #f43f5e; }
}

.core-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-pure);
  letter-spacing: 0.04em;
}

.core-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  color: var(--color-success);
  margin-top: 4px;
}

.core-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-success);
  box-shadow: 0 0 6px var(--color-success);
}

.core-metrics-row {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.core-metrics-row strong {
  color: var(--color-cyan);
}

/* ==========================================================================
   内容区块规范与日漫风卡片交互
   ========================================================================== */
.section-block {
  position: relative;
  padding: 84px 0;
  z-index: 2;
  border-bottom: 1px solid var(--border-subtle);
}

.section-block.alt-bg {
  background: rgba(11, 18, 32, 0.45);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--color-cyan);
  padding: 4px 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.12);
}

.section-heading {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-pure);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.62;
}

/* ==========================================================================
   模块 1: 核心优势 (Benefits)
   ========================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.benefit-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  backdrop-filter: blur(12px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.benefit-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-cyan);
  background: var(--bg-surface-hover);
}

.benefit-card:hover::before {
  opacity: 1;
}

.benefit-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(37, 99, 235, 0.28));
  border: 1px solid var(--border-glow);
  color: var(--color-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.15rem;
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.2);
}

.benefit-title {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--text-pure);
}

.benefit-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   模块 2: AI 工具支持 (AI Tools)
   ========================================================================== */
.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.ai-tool-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}

.ai-tool-card:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.22);
  transform: translateY(-3px);
}

.ai-tool-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-tool-title::before {
  content: "✦";
  color: var(--color-cyan);
}

.ai-tool-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   模块 3: 功能特性 (Features) - 4张
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 800px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}

.feature-item:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-3px);
}

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

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
}

.feature-audience {
  font-size: 0.8rem;
  color: var(--color-maple);
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid var(--border-maple);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.62;
}

/* ==========================================================================
   模块 4: 流媒体支持区
   ========================================================================== */
.streaming-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.streaming-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 16px;
}

.streaming-card {
  padding: 20px;
  background: rgba(9, 15, 28, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
}

.streaming-card:hover {
  border-color: var(--color-cyan);
  background: rgba(14, 25, 48, 0.85);
  transform: translateY(-2px);
}

.streaming-card-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-pure);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.streaming-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   模块 5: 真实使用场景卡 (Scenarios) - 4张
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 800px) {
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
}

.scenario-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}

.scenario-card:hover {
  border-color: var(--border-gold);
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-3px);
}

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

.scenario-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
}

.scenario-device {
  font-size: 0.8rem;
  color: var(--color-gold);
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid var(--border-gold);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.scenario-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.62;
}

/* ==========================================================================
   模块 6: 方案定价 (Pricing) - 3档
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

.pricing-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(14px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-cyan);
}

.pricing-card.featured {
  background: var(--bg-card-featured);
  border-color: var(--color-cyan);
  box-shadow: 0 0 32px rgba(56, 189, 248, 0.28);
  transform: scale(1.03);
}

@media (max-width: 900px) {
  .pricing-card.featured {
    transform: none;
  }
}

.badge-featured {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #f43f5e, #fbbf24);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 0 16px rgba(244, 63, 94, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.pricing-audience {
  font-size: 0.86rem;
  color: var(--color-cyan);
  font-weight: 600;
  margin-bottom: 6px;
}

.pricing-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 16px;
}

.pricing-price {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold);
}

.price-val {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-pure);
  font-variant-numeric: tabular-nums;
  margin-left: 2px;
}

.price-cycle {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.94rem;
  color: var(--text-main);
  padding: 7px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: "✦";
  color: var(--color-cyan);
  font-size: 0.9rem;
}

.pricing-cta {
  width: 100%;
}

/* ==========================================================================
   模块 7: 常见问题 (FAQ) - 6条
   ========================================================================== */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all 0.25s ease;
}

.faq-item.active {
  border-color: var(--border-glow);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.16);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-pure);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--color-cyan);
}

.faq-icon {
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--color-cyan);
  transition: transform 0.25s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--color-maple);
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.68;
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  margin-top: -4px;
  padding-top: 14px;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   模块 8: Final CTA 虚空之门
   ========================================================================== */
.final-cta-section {
  position: relative;
  padding: 88px 0;
  z-index: 2;
  border-bottom: 1px solid var(--border-subtle);
  background: radial-gradient(circle at center, rgba(37, 99, 235, 0.16) 0%, transparent 70%);
}

.final-cta-box {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  background: rgba(14, 23, 40, 0.85);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  padding: 56px 36px;
  box-shadow: 0 0 48px rgba(37, 99, 235, 0.25);
  backdrop-filter: blur(16px);
}

.final-cta-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 16px;
}

.final-cta-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ==========================================================================
   页脚 Footer
   ========================================================================== */
.site-footer {
  position: relative;
  background: #04070d;
  color: var(--text-muted);
  padding: 56px 0 32px;
  font-size: 0.92rem;
  border-top: 1px solid var(--border-subtle);
  z-index: 2;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-pure);
  font-weight: 800;
  font-size: 1.2rem;
}

.footer-brand img {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 8px var(--color-cyan-glow));
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

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

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.84rem;
  color: var(--text-subtle);
}

/* ==========================================================================
   移动端吸底 CTA 栏（磨砂玻璃光泽 · 滚动显隐与底栏避让）
   ========================================================================== */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(9, 15, 28, 0.94);
  border-top: 1px solid var(--border-glow);
  padding: 12px 20px;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(16px);
  z-index: 999;
  transform: translateY(110%);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

@media (max-width: 768px) {
  .mobile-sticky-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
  }
  .mobile-sticky-bar.visible {
    transform: translateY(0);
    opacity: 1;
  }
  .mobile-sticky-info {
    display: flex;
    flex-direction: column;
  }
  .mobile-sticky-title {
    font-weight: 800;
    font-size: 0.92rem;
    color: var(--text-pure);
  }
  .mobile-sticky-sub {
    font-size: 0.76rem;
    color: var(--color-cyan);
  }
  .mobile-sticky-btn {
    flex-shrink: 0;
    padding: 10px 20px;
    font-size: 0.92rem;
  }
}

/* ==========================================================================
   文章与常规页面通用深色日漫风格
   ========================================================================== */
.page-container {
  position: relative;
  padding: 48px 0 72px;
  z-index: 2;
}

.article-sheet, .legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 42px 36px;
  margin-bottom: 32px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-glass);
}

@media (max-width: 640px) {
  .article-sheet, .legal-card {
    padding: 26px 20px;
  }
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-subtle);
  margin-bottom: 24px;
}

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

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

.breadcrumb-sep {
  color: var(--text-subtle);
}

.article-header, .legal-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 20px;
  margin-bottom: 28px;
}

.article-title, .legal-title {
  font-size: 2.1rem;
  line-height: 1.32;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 12px;
}

.article-meta, .legal-date {
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.article-lead {
  font-size: 1.08rem;
  line-height: 1.74;
  color: var(--text-pure);
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--color-cyan);
  padding: 16px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 32px;
  box-shadow: inset 0 0 16px rgba(56, 189, 248, 0.05);
}

.article-body h2, .legal-section h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-top: 36px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-body h2::before {
  content: "✦";
  color: var(--color-cyan);
  font-size: 1rem;
}

.article-body h3, .legal-section h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-cyan);
  margin-top: 26px;
  margin-bottom: 12px;
}

.article-body p, .legal-section p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 18px;
}

.article-body ul, .legal-section ul, .article-body ol {
  margin-left: 22px;
  margin-bottom: 20px;
}

.article-body li, .legal-section li {
  font-size: 0.98rem;
  line-height: 1.76;
  color: var(--text-main);
  margin-bottom: 8px;
}

.article-cta-box {
  margin-top: 40px;
  padding: 30px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(56, 189, 248, 0.12));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.2);
}

.article-cta-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 8px;
}

.article-cta-desc {
  font-size: 0.96rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.article-related {
  margin-top: 36px;
  padding-top: 26px;
  border-top: 1px solid var(--border-subtle);
}

.article-related h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 14px;
}

.article-related ul {
  list-style: none;
  margin-left: 0;
}

.article-related li {
  padding: 8px 0;
}

/* 指南列表网格 (Tutorials / Guides) */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
  transition: all 0.25s ease;
}

.guide-card:hover {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-3px);
}

.guide-card-tag {
  font-size: 0.8rem;
  color: var(--color-cyan);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--border-glow);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 12px;
  font-weight: 600;
}

.guide-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 10px;
  line-height: 1.42;
}

.guide-card-desc {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.guide-card-link {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--color-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   无障碍：用户偏好减少动画 (Reduced Motion)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .maple-leaf, .star-dust {
    display: none !important;
  }
  .magic-circle-outer, .magic-circle-inner, .core-pulse-orb {
    animation: none !important;
  }
}