/* ====================================================================
   一翻云 (1fanjichang.top) - 动漫科技美学全新设计 (LAYER 1.5 DESIGN SPEC)
   视觉特性：深邃星空底色、全图呼吸灯、星星掉落与流星掠空、霓虹光泽CTA、
   可互动专线拓扑调优器、极速系统字体栈、无外部依赖、WCAG对比度达标
   ==================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* 动漫赛博与星空夜色调 */
  --bg-deep: #090d16;
  --bg-surface: #111827;
  --bg-surface-elevated: #1a2336;
  --bg-surface-glass: rgba(17, 24, 39, 0.82);
  --bg-surface-glass-light: rgba(255, 255, 255, 0.04);

  --text-main: #f8fafc;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-violet: #8b5cf6;
  --color-sakura: #ec4899;
  --color-sakura-light: #f472b6;
  --color-cyan: #06b6d4;
  --color-sky: #38bdf8;
  --color-amber: #f59e0b;
  --color-emerald: #10b981;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.14);
  --border-neon: rgba(99, 102, 241, 0.45);
  --border-sakura: rgba(236, 72, 153, 0.45);

  --glow-primary: 0 0 20px rgba(99, 102, 241, 0.35);
  --glow-sakura: 0 0 20px rgba(236, 72, 153, 0.35);
  --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.35);

  --max-w: 1140px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition-fast: 0.18s ease-in-out;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-main);
  background-color: var(--bg-deep);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #151c2e 0%, #090d16 65%);
  padding-bottom: 72px;
}

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

main {
  flex: 1;
  position: relative;
  z-index: 10;
}

a {
  color: var(--color-sky);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-sakura-light);
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-sky);
  outline-offset: 2px;
}

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

/* ================= 樱花与流星星星 Canvas 背景 ================= */
#animeCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.92;
}

/* ================= 全图呼吸灯光晕 ================= */
.ambient-breath-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 2;
  will-change: transform, opacity;
}

.orb-primary {
  width: 520px;
  height: 520px;
  top: -100px;
  right: -80px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, rgba(99, 102, 241, 0) 70%);
  animation: animeBreatheOrb 7s ease-in-out infinite alternate;
}

.orb-sakura {
  width: 480px;
  height: 480px;
  top: 360px;
  left: -120px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.22) 0%, rgba(236, 72, 153, 0) 70%);
  animation: animeBreatheOrb 9s ease-in-out infinite alternate-reverse;
}

.orb-cyan {
  width: 440px;
  height: 440px;
  bottom: 120px;
  right: -60px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.18) 0%, rgba(6, 182, 212, 0) 70%);
  animation: animeBreatheOrb 8s ease-in-out infinite alternate;
}

@keyframes animeBreatheOrb {
  0% { transform: scale(0.9) translate(0, 0); opacity: 0.55; }
  50% { opacity: 0.85; }
  100% { transform: scale(1.12) translate(15px, 20px); opacity: 0.65; }
}

/* 基础容器 */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ================= 头部导航 ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(9, 13, 22, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
}

.brand-logo:hover {
  color: var(--text-main);
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-sakura));
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 0 14px rgba(236, 72, 153, 0.45);
}

.nav-toggle {
  display: none;
  background: var(--bg-surface-glass-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  color: var(--text-main);
  min-height: 44px;
  min-width: 44px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 20px;
}

.nav-item a {
  color: var(--text-body);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 4px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-item a:hover,
.nav-item a.active {
  color: #ffffff;
  border-bottom: 2px solid var(--color-sakura);
  text-shadow: 0 0 8px rgba(236, 72, 153, 0.4);
}

/* ================= 鲜明动感 CTA 按钮 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  transition: all var(--transition-fast);
  text-align: center;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.22), transparent);
  transform: rotate(30deg) translate(-100%, 0);
  transition: transform 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(236, 72, 153, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-primary:hover::after {
  transform: rotate(30deg) translate(100%, 0);
}

.btn-secondary {
  background: var(--bg-surface-glass-light);
  color: var(--text-main) !important;
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-sky);
  color: #ffffff !important;
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.25);
}

.btn-block {
  display: flex;
  width: 100%;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-sakura));
  color: #ffffff !important;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  min-height: 44px;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.35);
  transition: all var(--transition-fast);
}

.header-cta:hover {
  box-shadow: 0 4px 18px rgba(236, 72, 153, 0.5);
  transform: translateY(-1px);
}

/* ================= Hero 区域 ================= */
.hero-section {
  padding: 64px 0 52px;
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

@media (min-width: 880px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }
}

.hero-anime-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(236, 72, 153, 0.12);
  border: 1px solid var(--border-sakura);
  color: #f472b6;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.2);
}

.hero-main h1 {
  font-size: 2.3rem;
  line-height: 1.25;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

@media (min-width: 640px) {
  .hero-main h1 {
    font-size: 2.85rem;
  }
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.hero-trust-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-trust-item svg {
  color: var(--color-sakura-light);
  flex-shrink: 0;
}

/* ================= 交互式 HUD 控制台 ================= */
.interactive-hud-card {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  position: relative;
}

.hud-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.hud-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-cyan);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 4px;
}

.hud-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
}

.hud-live-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: #4ade80;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.pulse-ring {
  width: 7px;
  height: 7px;
  background-color: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 8px #22c55e;
  animation: pulseDot 1.5s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

/* 拓扑线路画布 */
.circuit-canvas-wrap {
  width: 100%;
  background: rgba(10, 14, 26, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 18px;
}

.stream-track {
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 2;
  fill: none;
}

.stream-pulse {
  stroke-width: 2.5;
  stroke-linecap: round;
  fill: none;
  stroke-dasharray: 40 180;
  animation: streamDash 3s linear infinite;
}

.pulse-hkg { stroke: #38bdf8; }
.pulse-tyo { stroke: #f472b6; animation-delay: 0.8s; }
.pulse-sgp { stroke: #34d399; animation-delay: 1.6s; }

@keyframes streamDash {
  0% { stroke-dashoffset: 220; }
  100% { stroke-dashoffset: 0; }
}

/* 交互式节点选择标签器 */
.hud-tuner-box {
  background: var(--bg-surface-glass-light);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 16px;
}

.tuner-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.node-btn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

@media (min-width: 500px) {
  .node-btn-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.node-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-body);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.node-btn:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--color-primary);
  color: #ffffff;
}

.node-btn.active {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(236, 72, 153, 0.3));
  border-color: var(--color-sakura);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.3);
}

.hud-stat-display {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  text-align: center;
}

.hud-stat-item {
  background: rgba(10, 14, 26, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 4px;
}

.hud-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

.hud-stat-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-sky);
}

/* ================= 通用区块 ================= */
.section {
  padding: 60px 0;
  position: relative;
}

.section-alt {
  background: rgba(17, 24, 39, 0.65);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-head {
  margin-bottom: 36px;
}

.section-title {
  font-size: 1.85rem;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}

/* ================= 特性卡 (Features) ================= */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 980px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  height: 100%;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-neon);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}

.feature-icon-wrap {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(236, 72, 153, 0.2));
  color: var(--color-sakura-light);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  box-shadow: 0 0 14px rgba(99, 102, 241, 0.2);
}

.feature-meta {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--color-sky);
  font-weight: 700;
  margin-bottom: 6px;
}

.feature-title {
  font-size: 1.2rem;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-body {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* ================= 流媒体与 AI 支持 ================= */
.support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.support-panel {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  backdrop-filter: blur(10px);
}

.panel-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.panel-title {
  font-size: 1.3rem;
  color: #ffffff;
}

.panel-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.badge-chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  color: #ffffff;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.badge-chip:hover {
  border-color: var(--color-sakura-light);
  box-shadow: 0 0 10px rgba(236, 72, 153, 0.3);
}

.support-desc {
  font-size: 0.94rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* ================= 核心优势对比表 ================= */
.comparison-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-glass);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: rgba(255, 255, 255, 0.04);
  color: #ffffff;
  font-weight: 700;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.col-highlight {
  background: rgba(99, 102, 241, 0.12);
  font-weight: 600;
  color: #a5b4fc;
  border-left: 1px solid rgba(99, 102, 241, 0.2);
  border-right: 1px solid rgba(99, 102, 241, 0.2);
}

/* ================= 定价区 (Pricing) ================= */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 860px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }
}

.pricing-card {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
}

.pricing-featured {
  border: 2px solid var(--color-sakura);
  background: linear-gradient(180deg, rgba(236, 72, 153, 0.08) 0%, rgba(18, 24, 41, 0.88) 100%);
  box-shadow: 0 8px 30px rgba(236, 72, 153, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.card-tag {
  position: absolute;
  top: -13px;
  left: 24px;
  background: linear-gradient(135deg, var(--color-sakura), var(--color-primary));
  color: #ffffff;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.5);
}

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

.plan-name {
  font-size: 1.3rem;
  color: #ffffff;
  margin-bottom: 4px;
}

.plan-target {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

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

.price-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

.price-cycle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.feature-check {
  font-size: 0.92rem;
  color: var(--text-body);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.feature-check::before {
  content: "✦";
  color: var(--color-sakura-light);
  font-weight: 800;
}

/* ================= 使用场景卡 ================= */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

@media (min-width: 768px) {
  .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.scenario-card {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  backdrop-filter: blur(10px);
}

.scenario-title {
  font-size: 1.15rem;
  color: #ffffff;
  margin-bottom: 8px;
}

.scenario-device {
  font-size: 0.82rem;
  color: var(--color-cyan);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.25);
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-bottom: 14px;
}

.scenario-desc {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* ================= FAQ 常见问答 ================= */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 44px;
}

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

.faq-indicator {
  font-size: 1.3rem;
  line-height: 1;
  color: var(--color-sakura-light);
  font-weight: 400;
}

.faq-answer {
  padding: 0 22px 18px 22px;
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* ================= Final CTA ================= */
.final-cta-section {
  padding: 56px 0;
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.15) 0%, rgba(9, 13, 22, 0.8) 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.final-cta-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 1.95rem;
  color: #ffffff;
  margin-bottom: 12px;
  text-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.final-cta-desc {
  font-size: 1.02rem;
  color: var(--text-body);
  margin-bottom: 26px;
}

/* ================= 页脚 Footer ================= */
.site-footer {
  background-color: #070a12;
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 32px;
  font-size: 0.9rem;
  position: relative;
  z-index: 10;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand h3 {
  font-size: 1.15rem;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

.footer-col h4 {
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 14px;
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: var(--text-body);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.footer-links a:hover {
  color: var(--color-sakura-light);
}

.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ================= 移动端吸底 CTA ================= */
.mobile-bottom-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 66px;
  background: rgba(13, 18, 32, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border-light);
  padding: 10px 18px;
  z-index: 999;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.4);
  transform: translateY(100%);
  transition: transform 0.25s ease-in-out;
}

@media (max-width: 768px) {
  .mobile-bottom-cta.visible {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transform: translateY(0);
  }
}

.mobile-cta-info {
  display: flex;
  flex-direction: column;
}

.mobile-cta-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.mobile-cta-sub {
  font-size: 0.75rem;
  color: var(--color-sky);
}

.mobile-cta-btn {
  background: linear-gradient(135deg, var(--color-primary), var(--color-sakura));
  color: #ffffff !important;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 0 12px rgba(236, 72, 153, 0.4);
}

/* ================= 内页布局与排版 ================= */
.page-header {
  background: rgba(17, 24, 39, 0.75);
  border-bottom: 1px solid var(--border-subtle);
  padding: 44px 0;
  backdrop-filter: blur(10px);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

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

.page-title {
  font-size: 2.15rem;
  color: #ffffff;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

.page-content {
  padding: 50px 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

@media (min-width: 860px) {
  .article-layout {
    grid-template-columns: 1fr 280px;
  }
}

.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-body);
}

.prose h2 {
  font-size: 1.5rem;
  color: #ffffff;
  margin-top: 38px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.prose h3 {
  font-size: 1.18rem;
  color: #f1f5f9;
  margin-top: 26px;
  margin-bottom: 12px;
}

.prose p {
  margin-bottom: 18px;
}

.prose ul, .prose ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.prose li {
  margin-bottom: 8px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.92rem;
  background: var(--bg-surface-glass);
}

.prose th, .prose td {
  border: 1px solid var(--border-subtle);
  padding: 12px 16px;
  text-align: left;
}

.prose th {
  background: rgba(255, 255, 255, 0.05);
  font-weight: 700;
  color: #ffffff;
}

.callout-box {
  background: rgba(99, 102, 241, 0.1);
  border-left: 3px solid var(--color-sakura);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin: 24px 0;
  font-size: 0.95rem;
  color: var(--text-main);
}

.article-end-cta {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  margin-top: 44px;
  text-align: center;
  box-shadow: 0 0 24px rgba(99, 102, 241, 0.2);
}

.article-end-cta h3 {
  font-size: 1.3rem;
  color: #ffffff;
  margin-bottom: 8px;
}

.article-end-cta p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.sidebar-panel {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 22px;
  backdrop-filter: blur(10px);
}

.sidebar-title {
  font-size: 1rem;
  color: #ffffff;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
}

/* 响应式导航弹层 */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background-color: rgba(13, 18, 32, 0.96);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    gap: 16px;
    backdrop-filter: blur(16px);
  }

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

  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .nav-item a {
    display: block;
    padding: 8px 0;
  }

  .header-cta {
    width: 100%;
  }
}