/* ===================================================================
   魔戒机场 (The One Ring Cloud / mojiedl.cyou) - 史诗黑金熔火视觉系统
   超高对比度清晰版 · 完美适配白天与黑夜模式 · 拒绝任何字迹不清
   Obsidian: #050507 | Slate: #111216 | Gold: #ffb703 | Ember: #f77f00
=================================================================== */

:root {
  /* 黑夜火山深渊模式 (默认/Dark Mode: 浓郁黑金、纯白高亮文字) */
  --bg-primary: #050507;
  --bg-canvas: #050507;
  --bg-secondary: #0c0e14;
  --bg-tertiary: #131620;
  --bg-card: #11131a;
  --bg-card-hover: #181b24;
  --bg-glass: rgba(5, 5, 7, 0.92);

  --text-main: #ffffff;         /* 标题主字：纯白极致清晰 */
  --text-muted: #cbd5e1;        /* 正文段落：高对比度明亮银灰 */
  --text-subtle: #94a3b8;       /* 次级辅助：清晰亮灰 */
  --text-gold: #ffb703;
  --text-ember: #f77f00;

  --gold-primary: #ffb703;
  --gold-hover: #ffc32b;
  --gold-deep: #d48b00;
  --ember-orange: #f77f00;
  --ember-glow: rgba(247, 127, 0, 0.45);
  --gold-glow: rgba(255, 183, 3, 0.35);

  --border-card: rgba(255, 183, 3, 0.22);
  --border-focus: rgba(255, 183, 3, 0.65);
  --border-light: rgba(255, 255, 255, 0.12);

  --gradient-molten: linear-gradient(135deg, #ffb703 0%, #f77f00 50%, #d62828 100%);
  --gradient-ring: radial-gradient(circle, #ffe49e 0%, #ffb703 30%, #f77f00 70%, #7f1d1d 100%);
  --gradient-hero: linear-gradient(180deg, #ffffff 15%, #ffdf9e 50%, #ffb703 85%, #f77f00 100%);
  --gradient-dark-slab: linear-gradient(180deg, #181b24 0%, #0d0f16 100%);

  --shadow-gold-sm: 0 2px 10px rgba(255, 183, 3, 0.18);
  --shadow-gold-lg: 0 10px 40px rgba(247, 127, 0, 0.28), 0 0 25px rgba(255, 183, 3, 0.22);
  --shadow-monolith: 0 20px 50px rgba(0, 0, 0, 0.85), 0 0 30px rgba(255, 183, 3, 0.08);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Cinzel", "Times New Roman", "Songti SC", serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s ease;
}

/* 白天优雅明亮模式 (Day Mode: 纯净岩白、超高对比度深色文字、字字如炬) */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-canvas: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.94);

  --text-main: #0f172a;         /* 标题主字：深邃黑曜石黑，清晰度极高 */
  --text-muted: #334155;        /* 正文段落：高对比度深青灰，拒绝任何发灰不可辨 */
  --text-subtle: #475569;       /* 次级辅助：清晰深灰 */
  --text-gold: #b45309;
  --text-ember: #c2410c;

  --gold-primary: #d97706;      /* 典雅暖金色 */
  --gold-hover: #b45309;
  --gold-deep: #92400e;
  --ember-orange: #ea580c;
  --ember-glow: rgba(234, 88, 12, 0.22);
  --gold-glow: rgba(217, 119, 6, 0.28);

  --border-card: rgba(217, 119, 6, 0.26);
  --border-focus: rgba(217, 119, 6, 0.65);
  --border-light: rgba(203, 213, 225, 0.8);

  --gradient-molten: linear-gradient(135deg, #f59e0b 0%, #ea580c 50%, #dc2626 100%);
  --gradient-ring: radial-gradient(circle, #fef3c7 0%, #fde68a 30%, #f59e0b 70%, #b45309 100%);
  --gradient-hero: linear-gradient(180deg, #0f172a 20%, #b45309 65%, #c2410c 100%);
  --gradient-dark-slab: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);

  --shadow-gold-sm: 0 2px 8px rgba(217, 119, 6, 0.12);
  --shadow-gold-lg: 0 10px 30px rgba(217, 119, 6, 0.16);
  --shadow-monolith: 0 12px 35px rgba(0, 0, 0, 0.06);
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  position: relative;
}

/* 页面背景装饰 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 50% 12%, rgba(247, 127, 0, 0.1) 0%, transparent 65%),
    radial-gradient(circle at 8% 45%, rgba(255, 183, 3, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 92% 75%, rgba(214, 40, 40, 0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: -2;
}

[data-theme="light"] body::before {
  background: 
    radial-gradient(circle at 50% 10%, rgba(217, 119, 6, 0.06) 0%, transparent 60%),
    radial-gradient(circle at 10% 40%, rgba(234, 88, 12, 0.04) 0%, transparent 50%);
}

/* 容器布局 */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  max-width: 820px;
  margin: 0 auto 58px auto;
  text-align: center;
}

/* 锻造碑文徽章 (Forged Badge) */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 183, 3, 0.12);
  border: 1px solid var(--border-card);
  color: var(--gold-primary);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 18px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-gold-sm);
}

.section-badge .rune-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.26;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= 页眉导航条 (Header) ================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

/* 品牌 Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.01em;
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: scale(1.02);
}

.brand-ring-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-ring-icon:hover {
  transform: scale(1.08);
}

.brand-ring-icon svg {
  width: 32px;
  height: 32px;
  display: block;
  filter: drop-shadow(0 0 6px rgba(255, 183, 3, 0.75));
}

[data-theme="light"] .brand-ring-icon svg {
  filter: drop-shadow(0 0 5px rgba(217, 119, 6, 0.45));
}

.brand-text {
  background: linear-gradient(135deg, #ffffff 40%, #ffdf9e 70%, #ffb703 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
  letter-spacing: 0.5px;
}

[data-theme="light"] .brand-text {
  background: linear-gradient(135deg, #0f172a 40%, #b45309 85%, #ea580c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 导航目录 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.94rem;
  font-weight: 700;
  transition: all var(--transition-fast);
  padding: 8px 4px;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold-primary);
  text-shadow: 0 0 10px var(--gold-glow);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-molten);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--ember-glow);
}

.nav-link.highlight-nav {
  color: var(--ember-orange);
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link.highlight-nav::before {
  content: "✦";
  font-size: 0.8rem;
  color: var(--gold-primary);
  animation: runePulse 2s infinite ease-in-out;
}

@keyframes runePulse {
  0%, 100% { opacity: 0.6; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.15); filter: drop-shadow(0 0 4px var(--gold-primary)); }
}

/* 右侧控制栏 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 昼夜模式切换按钮 */
.theme-toggle-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: rgba(255, 183, 3, 0.1);
  border: 1px solid var(--border-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-primary);
  transition: all var(--transition-smooth);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.theme-toggle-btn:hover {
  background: rgba(255, 183, 3, 0.2);
  border-color: var(--gold-primary);
  box-shadow: 0 0 16px var(--gold-glow);
  transform: translateY(-2px);
}

.theme-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  position: absolute;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
}

.theme-icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
}

.theme-icon-moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-icon-sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
}

/* 移动端汉堡切换 */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

/* ================= 按钮与视觉冲击波 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.98rem;
  font-weight: 800;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-smooth);
  line-height: 1.4;
  border: none;
  position: relative;
  overflow: hidden;
  user-select: none;
}

/* 熔火锻造金质主按钮：白字带阴影，对比度极高，绝对清晰 */
.btn-primary {
  background: linear-gradient(135deg, #ffb703 0%, #f77f00 50%, #ea580c 100%);
  color: #ffffff !important;
  font-weight: 900;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  box-shadow: 0 4px 20px rgba(247, 127, 0, 0.45), inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
  box-shadow: 0 8px 30px rgba(247, 127, 0, 0.55), 0 0 20px var(--gold-glow);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-main);
  border: 1.5px solid var(--border-card);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 183, 3, 0.12);
  border-color: var(--gold-primary);
  color: var(--gold-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
}

/* 浓郁同心圆热冲击波 */
.shockwave-ring {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  border: 2px solid var(--gold-primary);
  box-shadow: 0 0 25px var(--ember-orange), inset 0 0 15px var(--gold-primary);
  transform: translate(-50%, -50%) scale(0);
  opacity: 1;
  animation: shockwaveExpand 0.75s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
  z-index: 99999;
}

@keyframes shockwaveExpand {
  0% {
    transform: translate(-50%, -50%) scale(0.1);
    opacity: 0.95;
    border-width: 4px;
  }
  100% {
    transform: translate(-50%, -50%) scale(2.6);
    opacity: 0;
    border-width: 0.5px;
  }
}

/* ================= 主视觉区 (Hero: 3D 魔戒与熔火空域) ================= */
.hero-section {
  padding-top: 150px;
  padding-bottom: 90px;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero-container {
  position: relative;
  z-index: 10;
}

.hero-inscription-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 22px;
  background: rgba(247, 127, 0, 0.1);
  border: 1px solid rgba(255, 183, 3, 0.35);
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--gold-primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-gold-sm);
}

.hero-inscription-pill .ember-spark {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ember-orange);
  box-shadow: 0 0 10px var(--ember-orange), 0 0 20px var(--gold-primary);
  animation: emberFlicker 1.8s infinite alternate;
}

@keyframes emberFlicker {
  0% { transform: scale(0.85); opacity: 0.6; }
  100% { transform: scale(1.25); opacity: 1; }
}

.hero-headline {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 20px rgba(255, 183, 3, 0.15));
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 820px;
  margin: 0 auto 38px auto;
  font-weight: 500;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

/* 互动 3D 悬浮魔戒舞台 */
.ring-void-container {
  width: 100%;
  max-width: 860px;
  height: 380px;
  margin: 0 auto 40px auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  cursor: grab;
}

.ring-void-container:active {
  cursor: grabbing;
}

#oneRingCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.ring-void-glow {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 520px;
  height: 70px;
  background: radial-gradient(ellipse at center, rgba(247, 127, 0, 0.45) 0%, rgba(255, 183, 3, 0.15) 45%, transparent 75%);
  filter: blur(28px);
  pointer-events: none;
  z-index: 1;
}

.elven-rune-ribbon {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  letter-spacing: 4px;
  color: var(--gold-primary);
  text-shadow: 0 0 10px var(--gold-glow);
  margin-bottom: 30px;
  user-select: none;
  opacity: 0.9;
  font-weight: 600;
}

/* 核心性能指标条 */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 30px 24px;
  box-shadow: var(--shadow-monolith);
}

.metric-item {
  text-align: center;
  padding: 0 12px;
  border-right: 1px solid var(--border-light);
}

.metric-item:last-child {
  border-right: none;
}

.metric-number {
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--gold-primary);
  line-height: 1.2;
  margin-bottom: 6px;
  text-shadow: 0 0 16px var(--gold-glow);
}

.metric-label {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 700;
}

/* ================= 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-card);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-molten);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

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

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

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(255, 183, 3, 0.12);
  border: 1px solid var(--border-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--gold-primary);
  box-shadow: 0 0 16px rgba(255, 183, 3, 0.15);
  transition: transform var(--transition-fast);
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.1) rotate(3deg);
  background: rgba(247, 127, 0, 0.18);
}

.feature-icon-box svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  stroke-width: 2.2;
  fill: none;
}

.feature-card-title {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feature-card-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
  font-weight: 500;
}

.feature-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 20px;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-main);
  font-weight: 600;
}

.checklist-item svg {
  width: 18px;
  height: 18px;
  color: var(--gold-primary);
  flex-shrink: 0;
}

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

.showcase-monolith {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 44px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.showcase-monolith:hover {
  transform: translateY(-6px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-gold-lg);
}

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.8px;
  margin-bottom: 18px;
  align-self: flex-start;
}

.badge-stream {
  background: rgba(220, 38, 38, 0.15);
  color: #ef4444;
  border: 1px solid rgba(220, 38, 38, 0.4);
}

.badge-ai-forge {
  background: rgba(247, 127, 0, 0.15);
  color: var(--gold-primary);
  border: 1px solid rgba(255, 183, 3, 0.4);
}

.showcase-title {
  font-size: 1.7rem;
  font-weight: 900;
  margin-bottom: 14px;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.showcase-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 26px;
  font-weight: 500;
}

.brand-pills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 30px;
}

.brand-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.brand-pill:hover {
  border-color: var(--gold-primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 183, 3, 0.15);
}

.brand-pill svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.showcase-specs {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px solid var(--border-light);
}

.spec-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
}

.spec-line .label {
  color: var(--text-muted);
  font-weight: 500;
}

.spec-line .val {
  font-weight: 800;
  color: var(--gold-primary);
}

/* ================= 真实套餐价格对比表 (魔戒真实不限时套餐) ================= */
.pricing-intro-banner {
  background: rgba(247, 127, 0, 0.12);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 18px 24px;
  margin: -20px auto 44px auto;
  max-width: 860px;
  text-align: center;
  color: var(--gold-primary);
  font-weight: 800;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

[data-theme="light"] .pricing-intro-banner {
  background: rgba(217, 119, 6, 0.1);
  color: #92400e;
  border-color: rgba(217, 119, 6, 0.35);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

/* 基础卡片 */
.plan-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-monolith);
}

.plan-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-gold-lg);
  border-color: var(--gold-primary);
}

/* 热门尊享高亮卡片：黑夜模式与白天模式分别进行极致高对比度定义，字字如炬 */
/* 1. 黑夜模式下的热门卡片 */
.plan-card.hot-perpetual {
  border: 2px solid var(--gold-primary);
  background: linear-gradient(180deg, #181a24 0%, #0d0f16 100%);
  box-shadow: 0 0 35px var(--ember-glow), var(--shadow-monolith);
  transform: scale(1.03);
  z-index: 2;
}

.plan-card.hot-perpetual .plan-name {
  color: #ffffff !important;
}

.plan-card.hot-perpetual .plan-summary {
  color: #cbd5e1 !important;
}

.plan-card.hot-perpetual .price-digits {
  color: #ffffff !important;
}

.plan-card.hot-perpetual .price-unit {
  color: #ffb703 !important;
}

.plan-card.hot-perpetual .price-sub {
  color: #ffc32b !important;
}

.plan-card.hot-perpetual .plan-feature-row {
  color: #f1f5f9 !important;
}

.plan-card.hot-perpetual .plan-feature-row strong {
  color: #ffffff !important;
}

/* 2. 白天模式下的热门卡片：纯白温润背景，纯黑加粗文字，金色边框，彻底告别看不清 */
[data-theme="light"] .plan-card.hot-perpetual {
  background: linear-gradient(180deg, #ffffff 0%, #fffdf7 100%) !important;
  border: 2.5px solid #d97706 !important;
  box-shadow: 0 14px 40px rgba(217, 119, 6, 0.24), 0 2px 10px rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .plan-card.hot-perpetual .plan-name {
  color: #0f172a !important;
}

[data-theme="light"] .plan-card.hot-perpetual .plan-summary {
  color: #334155 !important;
}

[data-theme="light"] .plan-card.hot-perpetual .price-digits {
  color: #0f172a !important;
}

[data-theme="light"] .plan-card.hot-perpetual .price-unit {
  color: #d97706 !important;
}

[data-theme="light"] .plan-card.hot-perpetual .price-sub {
  color: #b45309 !important;
}

[data-theme="light"] .plan-card.hot-perpetual .plan-feature-row {
  color: #1e293b !important;
}

[data-theme="light"] .plan-card.hot-perpetual .plan-feature-row strong {
  color: #0f172a !important;
}

[data-theme="light"] .plan-card.hot-perpetual .plan-quota-tag {
  background: rgba(217, 119, 6, 0.12) !important;
  color: #b45309 !important;
  border: 1px solid rgba(217, 119, 6, 0.35) !important;
}

.plan-card.hot-perpetual:hover {
  transform: scale(1.04) translateY(-6px);
}

.hot-ribbon {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #ffb703 0%, #f77f00 50%, #ea580c 100%);
  color: #ffffff !important;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  padding: 6px 22px;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 900;
  letter-spacing: 1px;
  box-shadow: 0 4px 14px rgba(247, 127, 0, 0.5);
  white-space: nowrap;
}

.plan-header {
  text-align: center;
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 8px;
}

.plan-quota-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 183, 3, 0.16);
  border: 1px solid rgba(255, 183, 3, 0.4);
  color: var(--gold-primary);
  font-size: 0.88rem;
  font-weight: 800;
  margin-bottom: 12px;
}

[data-theme="light"] .plan-quota-tag {
  background: rgba(217, 119, 6, 0.12);
  border: 1px solid rgba(217, 119, 6, 0.3);
  color: #b45309;
}

.plan-summary {
  font-size: 0.94rem;
  color: var(--text-muted);
  min-height: 44px;
  line-height: 1.6;
  font-weight: 500;
}

.plan-price-block {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin: 18px 0;
}

.price-unit {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--gold-primary);
}

.price-digits {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.price-sub {
  font-size: 0.94rem;
  color: var(--gold-primary);
  font-weight: 800;
  margin-left: 4px;
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
  padding-top: 22px;
  border-top: 1px solid var(--border-light);
}

.plan-feature-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-main);
  font-weight: 600;
}

.plan-feature-row svg {
  width: 19px;
  height: 19px;
  color: var(--gold-primary);
  flex-shrink: 0;
}

.plan-feature-row strong {
  font-weight: 800;
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-smooth);
}

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

.review-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: var(--gold-primary);
}

.review-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.review-text {
  font-size: 0.98rem;
  color: var(--text-main);
  line-height: 1.72;
  margin-bottom: 24px;
  font-weight: 500;
}

.reviewer-box {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-molten);
  color: #ffffff;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  box-shadow: 0 0 12px var(--ember-glow);
}

.reviewer-meta h4 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
}

.reviewer-meta p {
  font-size: 0.85rem;
  color: var(--text-subtle);
  font-weight: 500;
}

/* ================= 常见问题 (FAQ) ================= */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-block {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-block.open {
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-gold-sm);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-trigger:hover {
  color: var(--gold-primary);
}

.faq-arrow {
  width: 22px;
  height: 22px;
  stroke: var(--gold-primary);
  stroke-width: 2.2;
  fill: none;
  transition: transform var(--transition-smooth);
  flex-shrink: 0;
  margin-left: 14px;
}

.faq-block.open .faq-arrow {
  transform: rotate(180deg);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
  font-weight: 500;
}

.faq-block.open .faq-body {
  max-height: 500px;
  padding: 0 26px 24px 26px;
}

/* ================= 底部巨幅呼唤 (Call to Action) ================= */
.cta-forge-slab {
  background: linear-gradient(135deg, rgba(247, 127, 0, 0.2) 0%, rgba(255, 183, 3, 0.12) 50%, rgba(14, 16, 23, 0.98) 100%);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 50px var(--ember-glow), inset 0 0 30px rgba(255, 183, 3, 0.1);
}

.cta-forge-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-forge-desc {
  font-size: 1.15rem;
  color: #cbd5e1;
  max-width: 680px;
  margin: 0 auto 34px auto;
  font-weight: 500;
}

[data-theme="light"] .cta-forge-slab {
  background: linear-gradient(135deg, #fff7ed 0%, #fef3c7 50%, #ffffff 100%) !important;
  border: 2px solid #d97706 !important;
  box-shadow: 0 16px 45px rgba(217, 119, 6, 0.18) !important;
}

[data-theme="light"] .cta-forge-title {
  color: #0f172a !important;
}

[data-theme="light"] .cta-forge-desc {
  color: #334155 !important;
}

/* ================= 页脚 (Footer) =================
   严格规范：只保留这四个标题，内容打开新的页面展示：
   1. 网站地图
   2. 关于我们
   3. 服务条款
   4. 隐私政策
================================================= */
.site-footer {
  background-color: var(--bg-canvas);
  border-top: 1px solid var(--border-light);
  padding: 52px 0 38px 0;
  transition: background-color 0.4s ease;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  text-align: center;
}

.footer-brand-sig {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-item-link {
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.96rem;
  font-weight: 700;
  transition: all var(--transition-fast);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.footer-item-link:hover {
  color: var(--gold-primary);
  border-color: var(--border-card);
  background: rgba(255, 183, 3, 0.1);
  box-shadow: 0 0 12px var(--gold-glow);
}

.footer-copy {
  font-size: 0.88rem;
  color: var(--text-subtle);
  font-weight: 500;
}

/* ================= 文章单页与独立文档排版 ================= */
.article-header-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: 0.92rem;
  color: var(--text-subtle);
  margin-top: 14px;
  font-weight: 600;
}

.article-hero {
  padding-top: 140px;
  padding-bottom: 56px;
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
}

.article-body-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 48px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  margin-bottom: 34px;
  box-shadow: var(--shadow-monolith);
}

.article-h2 {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--text-main);
  margin: 32px 0 16px 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-h2::before {
  content: "";
  width: 5px;
  height: 22px;
  background: var(--gradient-molten);
  border-radius: 4px;
}

.article-p {
  font-size: 1.04rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 20px;
  font-weight: 500;
}

.article-h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 24px 0 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-h3::before {
  content: "◆";
  font-size: 0.75rem;
  color: var(--gold-primary);
}

.article-callout {
  background: rgba(255, 183, 3, 0.08);
  border-left: 4px solid var(--gold-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 18px 22px;
  margin: 22px 0;
  color: var(--text-main);
  font-size: 0.98rem;
  line-height: 1.7;
}

[data-theme="light"] .article-callout {
  background: rgba(217, 119, 6, 0.08);
  border-left-color: #d97706;
}

.article-callout strong {
  color: var(--gold-primary);
}

[data-theme="light"] .article-callout strong {
  color: #b45309;
}

.article-code-block {
  background: #090a0f;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9rem;
  color: #f8fafc;
  overflow-x: auto;
  line-height: 1.6;
  margin: 20px 0;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .article-code-block {
  background: #1e293b;
  color: #f1f5f9;
}

.article-badge-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.96rem;
}

.article-table th {
  background: rgba(255, 183, 3, 0.14);
  color: var(--gold-primary);
  padding: 14px 18px;
  font-weight: 800;
  border-bottom: 1px solid var(--border-card);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
  font-weight: 500;
}

.article-table tr:hover td {
  background: rgba(255, 183, 3, 0.05);
}

/* 文章目录 (Table of Contents - TOC) */
.article-toc-box {
  background: var(--bg-tertiary);
  border: 1.5px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 28px 0 36px 0;
  box-shadow: var(--shadow-gold-sm);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--gold-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 6px;
}

.toc-item a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.96rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.toc-item a:hover {
  color: var(--gold-primary);
  transform: translateX(4px);
}

.toc-item a::before {
  content: "▸";
  color: var(--gold-primary);
  font-size: 0.88rem;
}

/* 资讯中心专栏列表 (News Hub Grid) */
.news-hub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin: 40px 0 70px 0;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-monolith);
  position: relative;
  overflow: hidden;
}

.news-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-gold-lg);
}

.news-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  background: rgba(255, 183, 3, 0.12);
  color: var(--gold-primary);
  border: 1px solid var(--border-card);
  margin-bottom: 16px;
  align-self: flex-start;
}

.news-card-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

.news-card:hover .news-card-title {
  color: var(--gold-primary);
}

.news-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.68;
  margin-bottom: 22px;
  flex-grow: 1;
}

.news-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  font-size: 0.86rem;
  color: var(--text-subtle);
  font-weight: 600;
}

.news-read-more {
  color: var(--gold-primary);
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 相关阅读区域 (Related Articles Section) */
.related-reading-box {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border-light);
}

.related-reading-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.related-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.related-item:hover {
  transform: translateY(-3px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-gold-sm);
}

.related-item h4 {
  font-size: 0.96rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 8px;
  transition: color var(--transition-fast);
}

.related-item:hover h4 {
  color: var(--gold-primary);
}

.related-item span {
  font-size: 0.82rem;
  color: var(--text-subtle);
}

/* ================= 响应式媒体查询 (@media) ================= */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .plan-card.hot-perpetual {
    transform: none;
  }
  .plan-card.hot-perpetual:hover {
    transform: translateY(-8px);
  }

  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 16px;
  }

  .metric-item:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 68px 0;
  }

  .section-title {
    font-size: 1.95rem;
  }

  .hero-section {
    padding-top: 115px;
    padding-bottom: 50px;
  }

  .hero-headline {
    font-size: 2.3rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .ring-void-container {
    height: 280px;
  }

  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-canvas);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-card);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .metrics-strip {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .metric-item {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 14px;
  }

  .metric-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

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

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

  .hero-cta-group .btn {
    width: 100%;
  }

  .footer-nav-list {
    flex-direction: column;
    gap: 14px;
  }

  .article-body-card {
    padding: 26px 18px;
  }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: 1.95rem;
  }

  .brand-pills-grid {
    grid-template-columns: 1fr;
  }

  .cta-forge-slab {
    padding: 38px 20px;
  }

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