/* ==========================================================================
   IPLC.APP - Contemporary Zen "Emptiness" Minimalist Design System
   当代日式留白与空灵极简美学 | 纯原生 CSS | 无框无卡片架构 | 呼吸感微交互
   ========================================================================== */

/* --------------------------------------------------
   1. 调色盘与设计变量 (Zen Artisanal Palette)
   -------------------------------------------------- */
:root {
  /* 白天模式 (默认) - 温暖棉麻纸白与沉静炭墨 */
  --bg-primary: #fbfbfa;
  --bg-secondary: #f4f4f2;
  --bg-translucent: rgba(251, 251, 250, 0.88);
  --bg-hover: rgba(28, 28, 30, 0.035);

  --text-primary: #1c1c1e;        /* 沉着炭墨 (Muted Charcoal Ink) */
  --text-secondary: #5a5a5e;      /* 中阶墨灰 */
  --text-muted: #8e8e8b;          /* 水雾灰 (Water-mist Grey) */
  --text-faint: #b4b4b0;          /* 淡烟灰 */

  --border-line: rgba(28, 28, 30, 0.08);   /* 空灵极细分割线 */
  --border-focus: #1c1c1e;

  --accent-vermilion: #c23b2b;    /* 印章朱砂红点 (Cinnabar dot accent) */
  --accent-indigo: #2c4a6f;       /* 沉静靛青 */
  --accent-wash: rgba(194, 59, 43, 0.08);

  --font-serif-zen: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", SimSun, serif;
  --font-sans-zen: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --ease-zen: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-breath: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.4s var(--ease-zen);
}

[data-theme="dark"] {
  /* 夜间模式 - 极静砚石黑与柔光宣纸白 */
  --bg-primary: #111113;
  --bg-secondary: #18181b;
  --bg-translucent: rgba(17, 17, 19, 0.88);
  --bg-hover: rgba(255, 255, 255, 0.045);

  --text-primary: #ecece8;        /* 柔光宣纸白 */
  --text-secondary: #a2a29e;      /* 霁月灰 */
  --text-muted: #6b6b67;          /* 苍岩灰 */
  --text-faint: #444441;          /* 沉夜灰 */

  --border-line: rgba(255, 255, 255, 0.08);
  --border-focus: #ecece8;

  --accent-vermilion: #e05343;
  --accent-indigo: #4d7bb5;
  --accent-wash: rgba(224, 83, 67, 0.12);
}

/* --------------------------------------------------
   2. 全局重置与留白哲学 (Emptiness & Spacing)
   -------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans-zen);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  letter-spacing: 0.015em;
  transition: background-color 0.5s var(--ease-zen), color 0.5s var(--ease-zen);
  overflow-x: hidden;
  position: relative;
  font-feature-settings: "palt" 1;
}

/* 极微水墨纹理背景（极度克制） */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 700px;
  background: radial-gradient(circle at 50% 0%, rgba(28, 28, 30, 0.02) 0%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] body::before {
  background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.025) 0%, transparent 75%);
}

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------
   3. 禅意页眉导航栏 (Frameless Minimal Navbar)
   -------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background-color: var(--bg-translucent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-line);
  transition: var(--transition);
}

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

/* 品牌 Logo 与旋转徽章 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  text-decoration: none;
  user-select: none;
}

.logo-badge-wrap {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5px;
  cursor: pointer;
  transition: transform 0.4s var(--ease-zen);
}

.logo-badge-wrap::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--text-muted), var(--accent-vermilion), var(--text-faint), var(--text-muted));
  animation: rotateAura 8s linear infinite;
  opacity: 0.7;
}

.brand-logo-img {
  position: relative;
  z-index: 1;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: contain;
  background: #ffffff;
  display: block;
  transform-origin: center center;
  will-change: transform;
}

.brand-logo-img.rotating {
  animation: logoSpin 12s linear infinite;
}

.brand-logo:hover .brand-logo-img.rotating {
  animation-duration: 3s;
}

.brand-logo:hover .logo-badge-wrap {
  transform: scale(1.08);
}

.brand-logo-img.spin-burst {
  animation: logoSpinBurst 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) !important;
}

@keyframes logoSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes rotateAura {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes logoSpinBurst {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(360deg) scale(1.2); }
  100% { transform: rotate(720deg) scale(1); }
}

.brand-logo span.dot {
  color: var(--accent-vermilion);
}

/* 导航目录 (包含首页加每个板块 + 推荐资讯) */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1.5px;
  background-color: var(--text-primary);
  transition: width 0.3s var(--ease-zen);
}

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

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

/* 推荐资讯高亮标识 */
.nav-links a.nav-news {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-primary);
}

.nav-links a.nav-news .news-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-vermilion);
  animation: breathPulse 2.5s infinite;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 精致专业昼夜模式切换按钮 */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: 1px solid var(--border-line);
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.theme-toggle-btn:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 17px;
  height: 17px;
  transition: transform 0.4s var(--ease-zen), opacity 0.25s ease;
}

.theme-toggle-btn .sun-icon { display: block; }
.theme-toggle-btn .moon-icon { display: none; }

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

/* --------------------------------------------------
   4. 水晕涟漪呼吁转换按钮 (Water-Wake Ripple CTA)
   -------------------------------------------------- */
.btn-zen {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.94rem;
  font-weight: 600;
  padding: 11px 26px;
  border-radius: 9999px;
  transition: all 0.4s var(--ease-zen);
  text-decoration: none;
  white-space: nowrap;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  overflow: visible;
}

.btn-zen:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -8px rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] .btn-zen:hover {
  box-shadow: 0 10px 25px -8px rgba(255, 255, 255, 0.2);
}

/* 水滴静水扩散涟漪动效 (Delicate concentric paper-water wake ripple) */
.btn-zen-ripple::before,
.btn-zen-ripple::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 9999px;
  border: 1px solid var(--text-primary);
  opacity: 0;
  pointer-events: none;
  transform: scale(1);
}

.btn-zen-ripple:hover::before {
  animation: waterRipple 1.6s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

.btn-zen-ripple:hover::after {
  animation: waterRipple 1.6s cubic-bezier(0, 0.2, 0.8, 1) 0.5s infinite;
}

@keyframes waterRipple {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

.btn-zen-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-line);
}

.btn-zen-ghost:hover {
  border-color: var(--border-focus);
  background: var(--bg-hover);
}

/* --------------------------------------------------
   5. 主视觉区 (Hero Section with Zen Emptiness)
   -------------------------------------------------- */
.hero-section {
  padding: 100px 0 90px;
  text-align: center;
  position: relative;
}

.zen-status-anchor {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: 9999px;
  border: 1px solid var(--border-line);
  background: var(--bg-hover);
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  letter-spacing: 0.04em;
}

.zen-status-anchor .ping-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* 大标题必须包含当前品牌名 */
.hero-title {
  font-size: clamp(2.5rem, 5.4vw, 4.2rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.brand-emphasis {
  display: inline-block;
  color: var(--text-primary);
  position: relative;
}

.brand-emphasis span.dot {
  color: var(--accent-vermilion);
}

.hero-zen-sub {
  display: block;
  font-weight: 500;
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  color: var(--text-secondary);
  margin-top: 6px;
  letter-spacing: -0.01em;
}

/* 主视觉区副标题与简介 */
.hero-subtitle {
  font-size: clamp(1.08rem, 2vw, 1.25rem);
  color: var(--text-primary);
  max-width: 780px;
  margin: 0 auto 18px;
  font-weight: 500;
  line-height: 1.6;
}

.hero-intro {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 42px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* 呼吸隐现微交互指标 (Breath-fade Live Telemetry Metrics)
   Dormant: ultra-soft visibility (opacity: 35%); Sweeping near: breathes into sharp contrast (100%) */
.breath-telemetry-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 30px 20px;
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  transition: all 0.5s var(--ease-zen);
}

.telemetry-item {
  text-align: center;
  opacity: 0.38;
  filter: blur(0.2px);
  transition: opacity 0.5s var(--ease-breath), filter 0.5s ease, transform 0.4s var(--ease-zen);
  cursor: default;
}

/* 悬停或光标靠近时，呼吸浮现至 100% 锐度 */
.breath-telemetry-panel:hover .telemetry-item,
.telemetry-item:hover {
  opacity: 1;
  filter: none;
  transform: translateY(-2px);
}

.telemetry-val {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 4px;
}

.telemetry-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

@keyframes breathPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* --------------------------------------------------
   6. 禅意无框无卡片排版规范 (Frameless Open-Space)
   -------------------------------------------------- */
.zen-section {
  padding: 110px 0;
  position: relative;
  border-bottom: 1px solid var(--border-line);
}

.zen-section-header {
  max-width: 760px;
  margin: 0 auto 70px;
  text-align: center;
}

.zen-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.zen-title {
  font-size: clamp(2rem, 3.6vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
}

.zen-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --------------------------------------------------
   7. 核心优势 (3个图文模块 - 开放无界架构)
   -------------------------------------------------- */
.features-zen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.feature-zen-item {
  padding: 10px 0;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.feature-zen-item:hover {
  transform: translateY(-4px);
}

.feature-zen-num {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-vermilion);
  margin-bottom: 18px;
}

.feature-zen-item h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
  line-height: 1.4;
}

.feature-zen-item p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-zen-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px dashed var(--border-line);
  padding-top: 16px;
}

/* --------------------------------------------------
   8. 流媒体与 AI 支持图卡区 (开放双栏图文)
   -------------------------------------------------- */
.dual-zen-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 56px;
}

.dual-zen-column {
  display: flex;
  flex-direction: column;
  padding: 36px;
  background: var(--bg-hover);
  border-radius: 12px;
  border: 1px solid var(--border-line);
  transition: var(--transition);
}

.dual-zen-column:hover {
  border-color: var(--border-focus);
}

.dual-zen-tag {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.dual-zen-column h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.35;
}

.dual-zen-column p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
}

.zen-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.zen-pill {
  padding: 6px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  border-radius: 9999px;
  background: var(--bg-primary);
  border: 1px solid var(--border-line);
  color: var(--text-primary);
  transition: var(--transition);
}

.zen-pill:hover {
  border-color: var(--border-focus);
}

.zen-checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
  border-top: 1px solid var(--border-line);
  padding-top: 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.zen-checklist li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.zen-checklist li svg {
  width: 16px;
  height: 16px;
  color: #10b981;
  flex-shrink: 0;
}

/* --------------------------------------------------
   9. 套餐价格对比表 (网上真实主流价格方案)
   -------------------------------------------------- */
.pricing-zen-table {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-zen-item {
  display: flex;
  flex-direction: column;
  padding: 44px 34px;
  border-radius: 12px;
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  transition: var(--transition);
  position: relative;
}

.pricing-zen-item:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
}

.pricing-zen-item.zen-recommended {
  border-color: var(--text-primary);
  background: var(--bg-primary);
  box-shadow: 0 16px 36px -12px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .pricing-zen-item.zen-recommended {
  box-shadow: 0 16px 36px -12px rgba(255, 255, 255, 0.05);
}

.recommend-tag {
  position: absolute;
  top: -12px;
  left: 34px;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 12px;
  border-radius: 9999px;
}

.plan-zen-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-zen-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  min-height: 44px;
  margin-bottom: 24px;
}

.plan-zen-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-line);
}

.plan-zen-price .currency {
  font-size: 1.35rem;
  font-weight: 600;
}

.plan-zen-price .val {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.plan-zen-price .cycle {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-zen-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.plan-zen-features li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-zen-features li svg {
  width: 16px;
  height: 16px;
  color: #10b981;
  flex-shrink: 0;
}

.plan-zen-features li.dimmed {
  color: var(--text-faint);
  text-decoration: line-through;
}

.plan-zen-features li.dimmed svg {
  color: var(--text-faint);
}

/* --------------------------------------------------
   10. 用户评价 (排斥通用 AI 头像，采用禅意印章姓氏风格)
   -------------------------------------------------- */
.reviews-zen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.review-zen-card {
  padding: 34px 28px;
  border-radius: 12px;
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.review-zen-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-4px);
}

.review-quote {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  flex-grow: 1;
}

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

/* 禅意篆刻微印章标识 (替代通用 AI 头像) */
.zen-stamp {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1.5px solid var(--accent-vermilion);
  color: var(--accent-vermilion);
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif-zen);
  flex-shrink: 0;
  background: var(--accent-wash);
}

.review-user-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.review-user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------
   11. 常见问题解答 (FAQ Accordion with Zen Lines)
   -------------------------------------------------- */
.faq-zen-container {
  max-width: 820px;
  margin: 0 auto;
}

.faq-zen-item {
  border-bottom: 1px solid var(--border-line);
  transition: var(--transition);
}

.faq-zen-question {
  width: 100%;
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  background: transparent;
  transition: var(--transition);
}

.faq-zen-question:hover {
  color: var(--text-secondary);
}

.faq-zen-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.4s var(--ease-zen);
  color: var(--text-muted);
}

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

.faq-zen-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-zen), padding 0.3s ease;
}

.faq-zen-answer-body {
  padding: 0 0 24px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.faq-zen-item.active .faq-zen-answer {
  max-height: 350px;
}

/* --------------------------------------------------
   12. 呼吁转换区 (Bottom CTA in Zen Emptiness)
   -------------------------------------------------- */
.zen-cta-section {
  padding: 120px 0;
  text-align: center;
}

.zen-cta-inner {
  max-width: 680px;
  margin: 0 auto;
}

.zen-cta-title {
  font-size: clamp(2rem, 3.5vw, 2.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.zen-cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 38px;
  line-height: 1.8;
}

/* --------------------------------------------------
   13. 页脚规范 (严格只保留四个指定标题，新窗口打开)
   -------------------------------------------------- */
.site-footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-line);
  padding: 56px 0 40px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.footer-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 28px;
  border-top: 1px solid var(--border-line);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

/* --------------------------------------------------
   14. 子页面统一布局样式 (关于我们/服务条款/隐私政策/网站地图/推荐资讯)
   -------------------------------------------------- */
.subpage-hero {
  padding: 70px 0 45px;
  text-align: center;
  border-bottom: 1px solid var(--border-line);
  background: var(--bg-hover);
}

.subpage-content {
  padding: 60px 0 100px;
  max-width: 860px;
  margin: 0 auto;
}

.subpage-card {
  line-height: 1.9;
}

.subpage-card h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin: 40px 0 18px;
  color: var(--text-primary);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  gap: 10px;
}

.subpage-card h2:first-of-type {
  margin-top: 0;
}

.subpage-card p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 0.98rem;
}

.subpage-card ul, .subpage-card ol {
  margin: 14px 0 24px 24px;
  color: var(--text-secondary);
  font-size: 0.96rem;
}

.subpage-card li {
  margin-bottom: 10px;
}

.highlight-box {
  background: var(--bg-hover);
  border-left: 3px solid var(--text-primary);
  padding: 20px 24px;
  margin: 24px 0;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.sitemap-group {
  margin-bottom: 32px;
}

.sitemap-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.sitemap-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.sitemap-links a {
  display: block;
  padding: 12px 16px;
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: var(--transition);
}

.sitemap-links a:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
  transform: translateX(4px);
}

/* 推荐资讯卡片样式 (News & Insights Grid) */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.insight-card {
  padding: 30px;
  border-radius: 12px;
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  transition: var(--transition);
}

.insight-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-3px);
}

.insight-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.insight-category {
  color: var(--accent-vermilion);
  font-weight: 600;
}

.insight-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.insight-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

/* --------------------------------------------------
   14.1 长篇深度 SEO 文章专栏样式 (Article System)
   -------------------------------------------------- */
.article-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 50px 0 90px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.article-breadcrumb a:hover {
  color: var(--text-primary);
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-line);
}

.article-header h1 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.article-header-meta .tag-badge {
  color: var(--accent-vermilion);
  background: var(--accent-wash);
  padding: 3px 10px;
  border-radius: 9999px;
  font-weight: 600;
}

/* 目录盒子 (Table of Contents) */
.article-toc {
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  border-left: 3px solid var(--accent-vermilion);
  border-radius: 8px;
  padding: 24px 28px;
  margin-bottom: 40px;
}

.article-toc-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc ol {
  margin-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.article-toc a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.article-toc a:hover {
  color: var(--accent-vermilion);
  text-decoration: underline;
}

/* 正文排版 */
.article-body {
  font-size: 1.02rem;
  line-height: 1.88;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px;
}

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

.article-body ul, .article-body ol {
  margin: 16px 0 24px 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body strong {
  color: var(--text-primary);
}

/* 内链高亮样式 */
.article-body a.internal-link {
  color: var(--accent-vermilion);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity 0.2s ease;
}

.article-body a.internal-link:hover {
  opacity: 0.8;
}

/* 数据表格对比 */
.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--bg-hover);
  border-radius: 8px;
  overflow: hidden;
}

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

.article-table th {
  background: rgba(28, 28, 30, 0.05);
  font-weight: 700;
  color: var(--text-primary);
}

[data-theme="dark"] .article-table th {
  background: rgba(255, 255, 255, 0.06);
}

/* 文章内置 CTA 横幅 */
.article-cta-box {
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  border-radius: 12px;
  padding: 32px;
  margin: 44px 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

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

/* 相关阅读网格 (Related Reading) */
.article-related-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid var(--border-line);
}

.article-related-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

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

.related-card {
  padding: 20px 22px;
  background: var(--bg-hover);
  border: 1px solid var(--border-line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.related-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.related-card h4 {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.45;
}

.related-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* --------------------------------------------------
   15. 响应式适配 (Media Queries)
   -------------------------------------------------- */
@media (max-width: 1024px) {
  .features-zen-grid,
  .pricing-zen-table,
  .reviews-zen-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .breath-telemetry-panel {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-wrap {
    height: 68px;
  }

  .hero-section {
    padding: 60px 0 50px;
  }

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

  .hero-zen-sub {
    font-size: 1.35rem;
  }

  .hero-subtitle {
    font-size: 1.02rem;
  }

  .features-zen-grid,
  .dual-zen-grid,
  .pricing-zen-table,
  .reviews-zen-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .breath-telemetry-panel {
    grid-template-columns: repeat(2, 1fr);
    padding: 24px 10px;
  }

  .telemetry-val {
    font-size: 1.5rem;
  }

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

  .hero-actions .btn-zen {
    width: 100%;
  }

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