/* ===================================================================
   渔云 (CloudFisher) - Dawn-Mist Fluid-Angling UI Design System
   官网：https://cloud-fisher.homes
   AFF 推广入口：https://vip01.civetnet.com/#/?code=XAmsFt1n
   极简无冗余纯原生 CSS (Pure Native CSS, Zero Bloat)
   =================================================================== */

:root {
  /* Luminous twilight-pastel palette (默认白天模式) */
  --bg-primary: #f9f7fc;             /* airy cloud-lavender white */
  --bg-secondary: #ffffff;
  --bg-tertiary: #f3effa;
  --bg-card: rgba(255, 255, 255, 0.92);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.78);
  
  --text-primary: #18181b;           /* deep ink-slate typography */
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --text-accent: #7c3aed;            /* orchid-violet */
  
  --border-color: rgba(124, 58, 237, 0.12);
  --border-focus: #7c3aed;
  
  --accent-primary: #7c3aed;
  --accent-secondary: #ec4899;       /* sunset coral-pink */
  --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
  --accent-gradient-glow: linear-gradient(135deg, rgba(124, 58, 237, 0.12) 0%, rgba(236, 72, 153, 0.12) 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(124, 58, 237, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
  
  --badge-bg: rgba(124, 58, 237, 0.08);
  --badge-text: #7c3aed;
  --badge-border: rgba(124, 58, 237, 0.22);

  --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(24, 24, 27, 0.06), 0 2px 6px -1px rgba(124, 58, 237, 0.04);
  --shadow-lg: 0 16px 36px -6px rgba(24, 24, 27, 0.08), 0 4px 12px rgba(124, 58, 237, 0.06);
  --shadow-accent: 0 12px 28px -4px rgba(124, 58, 237, 0.28);
  
  --navbar-bg: rgba(249, 247, 252, 0.88);
  --toggle-bg: rgba(243, 239, 250, 0.9);
  --toggle-border: rgba(124, 58, 237, 0.2);
  --toggle-icon: #52525b;

  --tag-stream-bg: rgba(236, 72, 153, 0.09);
  --tag-stream-text: #db2777;
  --tag-ai-bg: rgba(124, 58, 237, 0.09);
  --tag-ai-text: #7c3aed;

  --carbon-rod: #27272a;
  --bobber-top: #ec4899;
  --bobber-bottom: #ffffff;
  --ripple-color: rgba(124, 58, 237, 0.25);
}

/* 夜间深空紫罗兰暗黑模式 */
[data-theme="dark"] {
  --bg-primary: #0c0b14;             /* deep twilight galaxy */
  --bg-secondary: #131122;
  --bg-tertiary: #1c1833;
  --bg-card: rgba(24, 21, 43, 0.82);
  --bg-card-hover: rgba(33, 29, 58, 0.95);
  --bg-glass: rgba(19, 17, 34, 0.85);
  
  --text-primary: #f4f4f5;
  --text-secondary: #d4d4d8;
  --text-muted: #a1a1aa;
  --text-accent: #a78bfa;
  
  --border-color: rgba(167, 139, 250, 0.16);
  --border-focus: #a78bfa;
  
  --accent-primary: #a78bfa;
  --accent-secondary: #f472b6;
  --accent-gradient: linear-gradient(135deg, #9333ea 0%, #ec4899 100%);
  --accent-gradient-glow: linear-gradient(135deg, rgba(147, 51, 234, 0.2) 0%, rgba(236, 72, 153, 0.2) 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(147, 51, 234, 0.08) 0%, rgba(236, 72, 153, 0.08) 100%);
  
  --badge-bg: rgba(167, 139, 250, 0.14);
  --badge-text: #c4b5fd;
  --badge-border: rgba(167, 139, 250, 0.35);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 28px -4px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 16px 42px -6px rgba(0, 0, 0, 0.7);
  --shadow-accent: 0 12px 28px -4px rgba(147, 51, 234, 0.38);
  
  --navbar-bg: rgba(12, 11, 20, 0.88);
  --toggle-bg: rgba(28, 24, 51, 0.9);
  --toggle-border: rgba(167, 139, 250, 0.25);
  --toggle-icon: #f4f4f5;

  --tag-stream-bg: rgba(244, 114, 182, 0.18);
  --tag-stream-text: #f472b6;
  --tag-ai-bg: rgba(167, 139, 250, 0.18);
  --tag-ai-text: #c4b5fd;

  --carbon-rod: #a1a1aa;
  --bobber-top: #f43f5e;
  --bobber-bottom: #ffffff;
  --ripple-color: rgba(167, 139, 250, 0.35);
}

/* 全局重置与平滑滚动 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* 锚点跳转平滑滚动偏移量，避免被顶部导航条遮挡 */
section, [id] {
  scroll-margin-top: 86px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.35s cubic-bezier(0.4, 0, 0.2, 1), color 0.35s ease;
  overflow-x: hidden;
  position: relative;
}

/* 诗意晨雾环境氛围光晕 (Dawn-Mist Glow) */
body::before {
  content: "";
  position: fixed;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 700px;
  background: radial-gradient(circle at 40% 40%, rgba(124, 58, 237, 0.08) 0%, rgba(236, 72, 153, 0.05) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] body::before {
  background: radial-gradient(circle at 40% 40%, rgba(147, 51, 234, 0.16) 0%, rgba(236, 72, 153, 0.09) 45%, transparent 70%);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ================= 顶栏 Header ================= */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background-color: var(--navbar-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.logo-group {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-img {
  height: 42px;
  width: auto;
  max-width: 165px;
  display: block;
  object-fit: contain;
  transition: transform 0.25s ease, filter 0.25s ease;
}

.logo-group:hover .logo-img {
  transform: scale(1.03);
}

[data-theme="dark"] .logo-img {
  filter: drop-shadow(0 0 2px rgba(255, 255, 255, 0.45));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 10px;
  border-radius: 8px;
  position: relative;
  transition: all 0.25s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-accent);
  background: var(--badge-bg);
}

.nav-link-badge {
  display: inline-block;
  font-size: 0.72rem;
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 1px 6px;
  border-radius: 10px;
  margin-left: 4px;
  font-weight: 600;
  vertical-align: text-top;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 昼夜模式切换按钮：精致微磨砂半透明质感，专业无粗糙表情，顺滑过渡 */
.theme-toggle-btn {
  background: var(--toggle-bg);
  border: 1px solid var(--toggle-border);
  border-radius: 22px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--toggle-icon);
  padding: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

.theme-icon-sun {
  display: block;
}

.theme-icon-moon {
  display: none;
}

[data-theme="dark"] .theme-icon-sun {
  display: none;
}

[data-theme="dark"] .theme-icon-moon {
  display: block;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 11px 24px;
  border-radius: 9999px; /* 优雅胶囊 Pill 形状 */
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  text-align: center;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff !important;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 16px 32px -4px rgba(124, 58, 237, 0.38);
  filter: brightness(1.06);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--text-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-outline-white:hover {
  background: #ffffff;
  border-color: var(--accent-primary);
  color: var(--text-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .btn-outline-white {
  background: rgba(30, 27, 54, 0.7);
  border-color: var(--border-color);
}

[data-theme="dark"] .btn-outline-white:hover {
  background: rgba(40, 36, 70, 0.9);
  color: var(--accent-primary);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* ================= 晨雾垂钓主视觉区 (Asymmetric Cloud-Horizon Hero) ================= */
.hero {
  padding: 60px 0 70px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
}

.hero-left {
  text-align: left;
  z-index: 2;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--badge-text);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  white-space: nowrap;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-secondary);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.7);
  animation: pulse-coral 2s infinite;
}

@keyframes pulse-coral {
  0% { box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.7); }
  70% { box-shadow: 0 0 0 9px rgba(236, 72, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(236, 72, 153, 0); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-intro {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 34px;
  max-width: 580px;
}

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

/* 诗意指标卡 Metric Badges */
.hero-metrics {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-color);
}

.metric-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.metric-item svg {
  color: var(--accent-primary);
  flex-shrink: 0;
}

/* ================= 诗意云端垂钓交互画卷 (Right Visual Area) ================= */
.angling-visual-stage {
  position: relative;
  width: 100%;
  height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.angling-canvas-container {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 28px;
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  backdrop-filter: blur(12px);
}

/* 矢量碳素鱼竿与弹性垂线 SVG */
.angling-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
}

/* 浮漂 (Bobber) */
.angling-bobber {
  position: absolute;
  width: 18px;
  height: 44px;
  top: 260px;
  left: 60%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 4;
  transition: transform 0.15s ease-out;
}

.bobber-body {
  width: 100%;
  height: 100%;
  position: relative;
  animation: bobber-float 3s ease-in-out infinite;
}

.bobber-top {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 18px;
  background: var(--bobber-top);
  border-radius: 2px;
  box-shadow: 0 0 10px rgba(236, 72, 153, 0.8);
}

.bobber-float {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 24px;
  background: radial-gradient(circle at 40% 30%, #ffffff 0%, #cbd5e1 50%, #64748b 100%);
  border-radius: 50% 50% 40% 40%;
  border: 1px solid rgba(0, 0, 0, 0.15);
}

@keyframes bobber-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(6px) rotate(3deg); }
}

/* 同心折射水波涟漪 (Refractive Ripple Rings) */
.ripple-rings {
  position: absolute;
  top: 280px;
  left: 60%;
  transform: translate(-50%, -50%);
  width: 140px;
  height: 40px;
  pointer-events: none;
  z-index: 2;
}

.ripple-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1.5px solid var(--ripple-color);
  animation: ripple-spread 3.5s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.ripple-ring:nth-child(2) {
  animation-delay: 1.1s;
}

.ripple-ring:nth-child(3) {
  animation-delay: 2.2s;
}

@keyframes ripple-spread {
  0% {
    width: 10px;
    height: 5px;
    opacity: 0.9;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    width: 180px;
    height: 60px;
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.4);
  }
}

/* 底部多层诗意淡紫云浪 (Pastel-purple Cloud Waves) */
.cloud-waves {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 180px;
  pointer-events: none;
  z-index: 1;
}

.cloud-wave-layer {
  position: absolute;
  bottom: 0;
  left: -20%;
  width: 140%;
  height: 140px;
  border-radius: 50% 50% 0 0;
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.12) 0%, rgba(236, 72, 153, 0.08) 100%);
  filter: blur(6px);
  animation: cloud-drift 8s ease-in-out infinite alternate;
}

.cloud-wave-layer:nth-child(2) {
  height: 110px;
  background: linear-gradient(180deg, rgba(236, 72, 153, 0.12) 0%, rgba(124, 58, 237, 0.14) 100%);
  filter: blur(4px);
  animation-duration: 6s;
  animation-direction: alternate-reverse;
}

.cloud-wave-layer:nth-child(3) {
  height: 70px;
  background: var(--bg-card);
  opacity: 0.85;
  filter: blur(2px);
}

@keyframes cloud-drift {
  0% { transform: translateX(0) scaleY(1); }
  100% { transform: translateX(25px) scaleY(1.08); }
}

/* 漂浮捕捞的白净功能胶囊 (Floating Media Pill Tags) */
.floating-pills-wrap {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: auto;
}

.floating-pill {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  backdrop-filter: blur(10px);
  white-space: nowrap;
}

.floating-pill:hover {
  transform: translateY(-4px) scale(1.06);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
  color: var(--text-accent);
}

.pill-1 { top: 75px; left: 10%; animation: pill-bob 4s ease-in-out infinite; }
.pill-2 { top: 140px; right: 12%; animation: pill-bob 5s ease-in-out infinite 0.8s; }
.pill-3 { bottom: 125px; left: 14%; animation: pill-bob 4.5s ease-in-out infinite 1.5s; }
.pill-4 { bottom: 90px; right: 16%; animation: pill-bob 4.2s ease-in-out infinite 2.2s; }
.pill-5 { top: 220px; left: 18%; animation: pill-bob 5.2s ease-in-out infinite 1s; }

@keyframes pill-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ================= 实时数据统计栏 ================= */
.stats-banner {
  margin: 10px 0 60px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 28px 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.stat-box {
  text-align: center;
  padding: 6px 12px;
}

.stat-box:not(:last-child) {
  border-right: 1px solid var(--border-color);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.stat-num span {
  font-size: 1.2rem;
  color: var(--text-accent);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ================= 通用 Section 标题 ================= */
.section {
  padding: 76px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-accent);
  margin-bottom: 12px;
  padding: 4px 14px;
  background: var(--badge-bg);
  border-radius: 9999px;
  border: 1px solid var(--badge-border);
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ================= 核心优势 3 个图文卡片 ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  padding: 38px 30px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card-hover);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.feature-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: var(--accent-gradient-glow);
  color: var(--text-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-list {
  border-top: 1px dashed var(--border-color);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list li svg {
  color: #10b981;
  flex-shrink: 0;
}

/* ================= 流媒体 & AI 图卡 ================= */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 42px 36px;
  box-shadow: var(--shadow-md);
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
}

.media-ai-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.card-header-flex {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 18px;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 9999px;
  letter-spacing: 0.04em;
}

.badge-stream {
  background: var(--tag-stream-bg);
  color: var(--tag-stream-text);
}

.badge-ai {
  background: var(--tag-ai-bg);
  color: var(--tag-ai-text);
}

.card-main-title {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-main-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 26px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.platform-pill {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 12px 8px;
  text-align: center;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.platform-pill:hover {
  background: var(--bg-secondary);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.platform-pill span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.service-specs-list {
  margin-top: auto;
  background: var(--bg-tertiary);
  border-radius: 14px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-specs-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
}

.service-specs-label {
  color: var(--text-muted);
}

.service-specs-val {
  font-weight: 600;
  color: var(--text-primary);
}

/* ================= 真实市场定价套餐对比表 ================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--accent-primary);
  background: var(--bg-card);
  box-shadow: var(--shadow-accent);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 18px;
  border-radius: 9999px;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
  white-space: nowrap;
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 22px;
  min-height: 44px;
  line-height: 1.6;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.pricing-currency {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
}

.pricing-amount {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.pricing-cycle {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  flex-shrink: 0;
  color: #10b981;
}

/* ================= 用户评价 Testimonials ================= */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.testimonial-stars {
  color: #f59e0b;
  margin-bottom: 16px;
  display: flex;
  gap: 3px;
  font-size: 1.05rem;
}

.testimonial-quote {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  font-style: italic;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
}

.avatar-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-gradient-glow);
  color: var(--text-accent);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}

.user-name {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
}

.user-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ================= 常见问题 FAQ ================= */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.25s ease;
  backdrop-filter: blur(10px);
}

.faq-item[open] {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-sm);
}

.faq-summary {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon-arrow {
  transition: transform 0.25s ease;
  color: var(--text-muted);
}

.faq-item[open] .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--text-accent);
}

.faq-content {
  padding: 0 26px 24px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px dashed transparent;
}

.faq-item[open] .faq-content {
  border-top-color: var(--border-color);
  padding-top: 18px;
}

/* ================= 尾部 CTA Banner ================= */
.cta-banner {
  margin: 60px 0 30px;
  background: var(--accent-gradient);
  border-radius: 28px;
  padding: 64px 44px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 45px -10px rgba(124, 58, 237, 0.45);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.16) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.cta-banner-desc {
  font-size: 1.15rem;
  opacity: 0.92;
  max-width: 660px;
  margin: 0 auto 34px;
  line-height: 1.7;
}

.cta-banner .btn-secondary {
  background-color: #ffffff;
  color: #7c3aed;
  border: none;
  font-weight: 700;
}

.cta-banner .btn-secondary:hover {
  background-color: #faf5ff;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* ================= 页脚 Footer ================= */
/* 明确要求：页脚只保留这四个标题，内容打开新的页面展示 */
.footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 44px 0 32px;
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.footer-nav-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 44px;
  margin-bottom: 26px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.footer-nav-link:hover {
  color: var(--text-accent);
  background-color: var(--badge-bg);
}

.footer-bottom {
  text-align: center;
  padding-top: 22px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.88rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.footer-bottom a:hover {
  color: var(--text-accent);
}

/* ================= 资讯专页专有样式 (news-7f4d.html) ================= */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-tag {
  background: var(--badge-bg);
  color: var(--text-accent);
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 9999px;
}

.news-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.45;
}

.news-summary {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 20px;
  flex-grow: 1;
}

.news-footer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-accent);
}

.news-footer-link:hover {
  gap: 10px;
}

/* ================= 子页面专有样式 (关于、条款、隐私、地图) ================= */
.subpage-hero {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.subpage-content {
  padding: 50px 0 80px;
  max-width: 880px;
  margin: 0 auto;
}

.article-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  padding: 44px;
  box-shadow: var(--shadow-sm);
}

.article-box h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 32px 0 14px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-box h2:first-child {
  margin-top: 0;
}

.article-box h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 22px 0 10px;
  color: var(--text-primary);
}

.article-box p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-box ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-box ul li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 8px;
}

.info-alert {
  background: var(--badge-bg);
  border-left: 4px solid var(--accent-primary);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
  margin: 24px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--text-accent);
  margin-bottom: 20px;
}

/* ================= 响应式适配 @media ================= */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .angling-visual-stage {
    height: 380px;
  }
  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* 移动端精简，保留Logo、主题切换与CTA */
  }
  
  .hero {
    padding: 40px 0 35px;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.25;
  }

  .hero-intro {
    font-size: 1rem;
    margin-bottom: 26px;
  }

  .hero-cta-group {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px; /* 适合大拇指无压点击 */
  }

  .hero-metrics {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .angling-visual-stage {
    height: 320px;
  }

  .stats-banner {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px 14px;
  }

  .stat-box:nth-child(2) {
    border-right: none;
  }

  .stat-num {
    font-size: 1.7rem;
  }

  .features-grid,
  .media-ai-grid,
  .pricing-grid,
  .testimonials-grid,
  .news-grid {
    grid-template-columns: 1fr; /* 移动端单栏完美呈现 */
  }

  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .cta-banner {
    padding: 40px 22px;
  }

  .cta-banner-title {
    font-size: 1.8rem;
  }

  .footer-nav-grid {
    flex-direction: column;
    gap: 16px;
  }

  .article-box {
    padding: 26px 20px;
  }
}

/* ================= 深度科普 SEO 文章排版规范 ================= */
.article-wrap {
  max-width: 900px;
  margin: 30px auto 80px;
  padding: 0 24px;
}

.article-hero {
  padding: 50px 0 30px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 36px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-title-main {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.article-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  font-weight: 500;
}

.article-toc {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 26px 28px;
  margin: 32px 0 44px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-toc-list a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list a:hover {
  text-decoration: underline;
  transform: translateX(4px);
}

.article-content-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-content-body h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 50px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content-body h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px;
}

.article-content-body p {
  margin-bottom: 20px;
}

.article-content-body ul,
.article-content-body ol {
  margin: 0 0 24px 24px;
  list-style: disc;
}

.article-content-body ol {
  list-style: decimal;
}

.article-content-body li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: 14px;
  border: 1px solid var(--border-color);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: var(--bg-card);
}

.article-table th,
.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

.article-table th {
  background: var(--bg-tertiary);
  font-weight: 800;
  color: var(--text-primary);
}

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

.callout-box {
  background: var(--badge-bg);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 14px 14px 0;
  padding: 20px 24px;
  margin: 32px 0;
  font-size: 0.98rem;
  line-height: 1.75;
}

.callout-box strong {
  color: var(--text-primary);
}

.article-faq-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 2px solid var(--border-color);
}

.article-related-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 2px solid var(--border-color);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 22px;
  transition: all 0.28s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-sm);
}

.related-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .article-title-main {
    font-size: 1.95rem;
  }
  .article-content-body h2 {
    font-size: 1.45rem;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}