/* ===================================================================
   渔云 (CloudFisher) - 新中式烟雨水墨奢雅美学 (Neo-Chinese Ink-Wash Luxury)
   调色盘：宣纸温玉 (#fbfaf8) · 远山烟雨紫 (#ddd6fe/#7c3aed) · 朱砂落日印 (#e11d48) · 徽墨浓黑 (#1c1917)
   特性：宋黑混搭排版、阴刻印章凹陷动效、宣纸留白、极细墨线、零外部重库
   =================================================================== */

:root {
  /* 白天模式：温润生宣与暮色丁香烟雨 */
  --bg-paper: #fbfaf8;
  --bg-paper-translucent: rgba(251, 250, 248, 0.88);
  --bg-card: rgba(255, 255, 255, 0.86);
  --bg-card-hover: #ffffff;
  --bg-tertiary: #f4f1ea;
  
  --ink-heavy: #1c1917;       /* 徽墨浓黑 - 标题与主要文字 */
  --ink-medium: #44403c;      /* 墨色半浓 - 正文 */
  --ink-light: #78716c;       /* 墨色淡雅 - 次要文字与说明 */
  --ink-faint: #a8a29e;       /* 极淡墨烟 */
  
  --lilac-wash: #ddd6fe;      /* 丁香水墨晕染淡彩 */
  --lilac-glow: rgba(124, 58, 237, 0.12);
  --lilac-accent: #7c3aed;    /* 远山黛紫 */
  
  --seal-vermilion: #e11d48;  /* 落日朱砂印章红 */
  --seal-vermilion-hover: #be123c;
  --seal-glow: rgba(225, 29, 72, 0.22);
  --seal-bg-tint: rgba(225, 29, 72, 0.06);
  
  --hairline: rgba(28, 25, 23, 0.09); /* 极细垂直/水平墨线 */
  --hairline-strong: rgba(28, 25, 23, 0.18);
  
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", "Noto Serif SC", "SimSun", "STSong", "Songti TC", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;

  --shadow-subtle: 0 4px 20px -2px rgba(28, 25, 23, 0.05);
  --shadow-float: 0 16px 36px -4px rgba(28, 25, 23, 0.08), 0 0 20px rgba(124, 58, 237, 0.06);
  --shadow-seal: 0 6px 18px rgba(225, 29, 72, 0.25);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --container-width: 1200px;
  --transition-speed: 0.35s;
}

[data-theme="dark"] {
  /* 夜间模式：墨玉砚台、水墨夜色与深紫幽烟 */
  --bg-paper: #0c0a09;
  --bg-paper-translucent: rgba(12, 10, 9, 0.90);
  --bg-card: rgba(23, 20, 18, 0.88);
  --bg-card-hover: #1c1917;
  --bg-tertiary: #171412;
  
  --ink-heavy: #fafaf9;       /* 银钩铁画纯白 */
  --ink-medium: #d6d3d1;      /* 绢帛浅灰 */
  --ink-light: #a8a29e;       /* 沉香浅灰 */
  --ink-faint: #57534e;       /* 隐约墨痕 */
  
  --lilac-wash: #4c1d95;
  --lilac-glow: rgba(167, 139, 250, 0.18);
  --lilac-accent: #a78bfa;
  
  --seal-vermilion: #f43f5e;  /* 暗夜红玉髓 */
  --seal-vermilion-hover: #fb7185;
  --seal-glow: rgba(244, 63, 94, 0.32);
  --seal-bg-tint: rgba(244, 63, 94, 0.12);
  
  --hairline: rgba(250, 250, 249, 0.12);
  --hairline-strong: rgba(250, 250, 249, 0.22);
  
  --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --shadow-float: 0 16px 36px -4px rgba(0, 0, 0, 0.7), 0 0 25px rgba(124, 58, 237, 0.18);
  --shadow-seal: 0 6px 20px rgba(244, 63, 94, 0.35);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px; /* 防止锚点跳转时被固定页眉遮挡 */
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-paper);
  color: var(--ink-medium);
  line-height: 1.75;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  overflow-x: hidden;
  position: relative;
}

/* 东方宣纸微纹理与水墨氤氲背景层 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(at 15% 20%, var(--lilac-glow) 0px, transparent 55%),
    radial-gradient(at 85% 80%, rgba(225, 29, 72, 0.04) 0px, transparent 50%);
  pointer-events: none;
  z-index: -2;
}

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

img, svg {
  vertical-align: middle;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===================================================================
   页眉导航 (Sticky Header)
   包含：首页 + 各板块锚点 + 推荐资讯 + 质感昼夜切换 + CTA
   =================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-paper-translucent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--hairline);
  transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s ease;
}

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

[data-theme="dark"] .logo-img {
  filter: brightness(1.15) contrast(1.05) drop-shadow(0 2px 12px rgba(167, 139, 250, 0.3));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links li {
  position: relative;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-light);
  padding: 6px 2px;
  position: relative;
  letter-spacing: 0.02em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink-heavy);
}

/* 东方水墨划线微动效 */
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--seal-vermilion);
  transition: all 0.25s ease;
  transform: translateX(-50%);
  border-radius: var(--radius-full);
}

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

/* “推荐资讯”高亮水墨印章小徽标 */
.nav-badge-news {
  font-size: 0.72rem;
  color: var(--seal-vermilion);
  background: var(--seal-bg-tint);
  border: 1px solid var(--seal-vermilion);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 4px;
  font-weight: 600;
  font-family: var(--font-serif);
  vertical-align: middle;
}

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

/* 昼夜切换按钮 - 精致水玉通透质感 */
.theme-toggle-btn {
  background: rgba(125, 125, 125, 0.06);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-medium);
  transition: all 0.25s ease;
  outline: none;
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  background: rgba(125, 125, 125, 0.14);
  color: var(--ink-heavy);
  border-color: var(--seal-vermilion);
  transform: translateY(-1px);
}

.theme-icon-sun, .theme-icon-moon {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
}

.theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
.theme-icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}
[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ===================================================================
   东方印章凹陷动效 (Intaglio Seal-Stamp Effect) & 按钮体系
   =================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 4px; /* 典雅微方印造型 */
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  border: 1px solid transparent;
  position: relative;
  user-select: none;
}

/* 朱砂方印主按钮 (Vermilion Seal Button) */
.btn-seal-primary {
  background: var(--seal-vermilion);
  color: #ffffff !important;
  border-color: var(--seal-vermilion);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), var(--shadow-seal);
  font-family: var(--font-sans);
  letter-spacing: 0.04em;
}

.btn-seal-primary:hover {
  background: var(--seal-vermilion-hover);
  border-color: var(--seal-vermilion-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(225, 29, 72, 0.35);
}

/* 阴刻印章按压凹陷微动效 (Intaglio Seal Impression on Click) */
.btn-seal-primary:active,
.btn:active {
  transform: scale(0.97) translateY(2px) !important;
  box-shadow: inset 2px 2px 6px rgba(0, 0, 0, 0.4), inset -1px -1px 3px rgba(255, 255, 255, 0.15) !important;
}

/* 徽墨宣纸次级按钮 */
.btn-ink-outline {
  background: var(--bg-card);
  color: var(--ink-heavy);
  border: 1px solid var(--hairline-strong);
  box-shadow: var(--shadow-subtle);
}

.btn-ink-outline:hover {
  background: var(--bg-tertiary);
  border-color: var(--ink-heavy);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
}

/* ===================================================================
   主视觉区 (Hero Section - Calligraphic Negative Space)
   =================================================================== */

.hero-section {
  position: relative;
  padding: 100px 0 90px;
  overflow: hidden;
  border-bottom: 1px solid var(--hairline);
}

/* 交互式毛细水墨烟雨扩散画布 (Capillary Ink-Diffusion Canvas) */
#inkCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-seal-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 16px;
  background: var(--bg-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  color: var(--ink-heavy);
  margin-bottom: 28px;
  box-shadow: var(--shadow-subtle);
}

.seal-stamp-mini {
  display: inline-block;
  padding: 2px 6px;
  background: var(--seal-vermilion);
  color: #fff;
  font-size: 0.72rem;
  font-family: var(--font-serif);
  border-radius: 2px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* 核心大标题：包含品牌名【渔云】，宋黑混搭排版 */
.hero-title {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  line-height: 1.22;
  font-weight: 800;
  color: var(--ink-heavy);
  letter-spacing: -0.01em;
  margin-bottom: 22px;
}

.brand-highlight {
  position: relative;
  display: inline-block;
  color: var(--seal-vermilion);
}

/* 标题下方的水墨轻勾笔触 */
.brand-highlight::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, rgba(225, 29, 72, 0.28) 0%, rgba(124, 58, 237, 0.15) 100%);
  z-index: -1;
  border-radius: var(--radius-full);
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--ink-heavy);
  margin-bottom: 18px;
  letter-spacing: 0.03em;
  opacity: 0.92;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--ink-medium);
  line-height: 1.85;
  margin-bottom: 38px;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 40px;
}

/* 宣纸极细垂线信赖背书 */
.hero-trust-row {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--ink-light);
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--seal-vermilion);
}

/* 视觉右侧：毛细水墨烟雨垂钓画卷与悬浮服务签 */
.hero-art-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 380px;
  border: 1px solid var(--hairline);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  box-shadow: var(--shadow-float);
  overflow: hidden;
}

.hero-art-panel::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--lilac-glow) 0%, transparent 60%);
  pointer-events: none;
}

/* 垂钓丝线艺术效果 */
.angling-line-art {
  width: 2px;
  height: 110px;
  background: linear-gradient(180deg, var(--ink-faint) 0%, var(--seal-vermilion) 70%, var(--lilac-accent) 100%);
  margin: 0 auto 16px;
  position: relative;
  opacity: 0.7;
}

.angling-hook-point {
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--seal-vermilion);
  box-shadow: 0 0 10px var(--seal-vermilion);
}

.angling-art-caption {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink-heavy);
  margin-bottom: 26px;
  letter-spacing: 0.08em;
}

/* 水墨烟雨中浮现的漂浮标签 */
.floating-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  position: relative;
  z-index: 2;
}

.floating-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-paper);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  color: var(--ink-heavy);
  font-weight: 500;
  box-shadow: var(--shadow-subtle);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: default;
}

.floating-tag:hover {
  transform: translateY(-3px);
  border-color: var(--seal-vermilion);
  box-shadow: 0 8px 16px var(--lilac-glow);
}

.tag-dot-seal {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--seal-vermilion);
}

/* ===================================================================
   板块标题统一样式 (Section Headers)
   =================================================================== */

.section-wrapper {
  padding: 90px 0;
  position: relative;
}

.section-wrapper:nth-of-type(even) {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-seal-tag {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--seal-vermilion);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
  position: relative;
  padding: 0 14px;
}

.section-seal-tag::before,
.section-seal-tag::after {
  content: "—";
  opacity: 0.4;
  margin: 0 6px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--ink-heavy);
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--ink-light);
  line-height: 1.8;
}

/* ===================================================================
   核心优势卡片（3个图文卡片）
   =================================================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--hairline-strong);
  box-shadow: var(--shadow-float);
}

.feature-seal-num {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--seal-vermilion);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-heavy);
  margin-bottom: 14px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--ink-medium);
  line-height: 1.75;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-line-divider {
  height: 1px;
  background: var(--hairline);
  margin-bottom: 18px;
}

.feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--ink-light);
}

.feature-bullets li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bullet-red-point {
  color: var(--seal-vermilion);
  font-weight: bold;
}

/* ===================================================================
   流媒体与 AI 支持图卡展示模块
   =================================================================== */

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 40px 34px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.showcase-card:hover {
  border-color: var(--seal-vermilion);
  box-shadow: var(--shadow-float);
}

.showcase-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.showcase-seal-icon {
  width: 48px;
  height: 48px;
  border-radius: 4px;
  background: var(--seal-bg-tint);
  border: 1px solid var(--seal-vermilion);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--seal-vermilion);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
}

.showcase-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--ink-heavy);
  font-weight: 700;
}

.showcase-card p {
  color: var(--ink-medium);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 26px;
}

.badge-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.media-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-paper);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--ink-heavy);
  transition: all 0.25s ease;
}

.media-badge:hover {
  transform: translateY(-2px);
  border-color: var(--seal-vermilion);
  box-shadow: var(--shadow-subtle);
}

.badge-tag-status {
  font-size: 0.72rem;
  padding: 1px 6px;
  border-radius: 2px;
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  font-weight: 600;
}

/* ===================================================================
   套餐价格对比表（参考网上真实套餐价格）
   真实价格：月付 ¥16.8 / 季付 ¥56 / 年付 ¥198
   =================================================================== */

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.pricing-card.popular {
  border: 2px solid var(--seal-vermilion);
  box-shadow: 0 12px 36px var(--seal-glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-float);
}

.pricing-card.popular:hover {
  transform: scale(1.03) translateY(-6px);
}

/* 顶部朱砂印章推荐标 */
.popular-seal-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--seal-vermilion);
  color: #ffffff;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 2px;
  letter-spacing: 0.1em;
  box-shadow: var(--shadow-seal);
}

.plan-header {
  text-align: center;
  margin-bottom: 22px;
}

.plan-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-heavy);
  margin-bottom: 6px;
}

.plan-tagline {
  font-size: 0.88rem;
  color: var(--ink-light);
}

.plan-price-box {
  margin: 18px 0 22px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.currency-sym {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--seal-vermilion);
}

.price-num {
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1;
  color: var(--ink-heavy);
  font-family: var(--font-sans);
}

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

.plan-features-list {
  list-style: none;
  margin-bottom: 34px;
  display: flex;
  flex-direction: column;
  gap: 13px;
  font-size: 0.92rem;
  flex-grow: 1;
}

.plan-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-medium);
}

.plan-features-list li.highlight {
  font-weight: 600;
  color: var(--ink-heavy);
}

.check-seal-icon {
  width: 18px;
  height: 18px;
  color: var(--seal-vermilion);
  flex-shrink: 0;
}

/* ===================================================================
   用户口碑评价 (Testimonials)
   =================================================================== */

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--seal-vermilion);
  box-shadow: var(--shadow-float);
}

.rating-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--ink-medium);
  line-height: 1.8;
  margin-bottom: 22px;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--hairline);
  padding-top: 16px;
}

.author-avatar-seal {
  width: 42px;
  height: 42px;
  border-radius: 4px;
  background: var(--seal-vermilion);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-heavy);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--ink-light);
}

/* ===================================================================
   常见问题解答 (FAQ)
   =================================================================== */

.faq-container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item:hover {
  border-color: var(--seal-vermilion);
}

.faq-item details {
  width: 100%;
}

.faq-item summary {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-heavy);
  font-family: var(--font-serif);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.faq-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--ink-light);
  flex-shrink: 0;
}

.faq-item details[open] .faq-arrow {
  transform: rotate(180deg);
  color: var(--seal-vermilion);
}

.faq-content {
  padding: 0 26px 24px;
  color: var(--ink-medium);
  font-size: 0.96rem;
  line-height: 1.85;
  border-top: 1px solid var(--hairline);
  padding-top: 18px;
}

/* ===================================================================
   底部终极 CTA 横幅
   =================================================================== */

.final-cta-section {
  padding: 80px 0;
  text-align: center;
}

.final-cta-card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  padding: 60px 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-float);
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.final-cta-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--seal-vermilion), var(--lilac-accent));
}

.final-cta-card h2 {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  color: var(--ink-heavy);
  margin-bottom: 16px;
  font-weight: 700;
}

.final-cta-card p {
  font-size: 1.08rem;
  color: var(--ink-medium);
  margin-bottom: 34px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* ===================================================================
   页脚 - 严格只保留四个标题，在新页面展示
   网站地图 · 关于我们 · 服务条款 · 隐私政策
   =================================================================== */

.footer {
  background: var(--bg-paper);
  border-top: 1px solid var(--hairline);
  padding: 50px 0 38px;
  transition: background-color var(--transition-speed) ease;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 44px;
  list-style: none;
  margin-bottom: 26px;
}

.footer-nav a {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink-medium);
  transition: color 0.25s ease;
  padding: 4px 8px;
  position: relative;
}

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

.footer-copy {
  text-align: center;
  font-size: 0.86rem;
  color: var(--ink-light);
  letter-spacing: 0.02em;
}

/* ===================================================================
   子页面（资讯/文章/条款）专属阅读排版
   =================================================================== */

.page-header {
  padding: 70px 0 45px;
  text-align: center;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--hairline);
}

.article-container {
  max-width: 880px;
  margin: 50px auto 90px;
  padding: 0 24px;
}

.article-content {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 50px;
  box-shadow: var(--shadow-subtle);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  margin: 38px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink-heavy);
}

.article-content h2:first-of-type {
  margin-top: 0;
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--ink-heavy);
}

.article-content p {
  font-size: 1.02rem;
  color: var(--ink-medium);
  line-height: 1.85;
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  padding-left: 24px;
  margin-bottom: 22px;
  color: var(--ink-medium);
  line-height: 1.85;
}

.article-content li {
  margin-bottom: 10px;
}

/* 资讯列表专属卡片排版 */
.digest-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 28px;
}

.digest-card {
  padding: 30px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  transition: all 0.25s ease;
}

.digest-card:hover {
  border-color: var(--seal-vermilion);
  transform: translateY(-3px);
  box-shadow: var(--shadow-subtle);
}

.digest-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--ink-light);
  margin-bottom: 10px;
}

.digest-tag {
  background: var(--seal-bg-tint);
  color: var(--seal-vermilion);
  padding: 2px 8px;
  border-radius: 2px;
  font-weight: 600;
}

.digest-card h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: var(--ink-heavy);
}

/* 深度文章专属目录 (TOC) */
.article-toc {
  background: var(--bg-tertiary);
  border: 1px solid var(--hairline-strong);
  border-left: 4px solid var(--seal-vermilion);
  border-radius: var(--radius-sm);
  padding: 24px 28px;
  margin: 28px 0 36px;
}

.article-toc-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-heavy);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-toc-list a {
  color: var(--ink-medium);
  font-size: 0.95rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-toc-list a:hover {
  color: var(--seal-vermilion);
  transform: translateX(4px);
}

/* 文章正文表格与强调框 */
.article-table-wrapper {
  overflow-x: auto;
  margin: 24px 0 32px;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
}

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

.article-table th {
  background: var(--bg-tertiary);
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ink-heavy);
}

.article-callout {
  background: var(--seal-bg-tint);
  border: 1px solid var(--border-seal);
  border-left: 4px solid var(--seal-vermilion);
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  margin: 24px 0;
  color: var(--ink-heavy);
  font-size: 0.96rem;
  line-height: 1.8;
}

/* 文章专属 FAQ 区块 */
.article-faq-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--hairline);
}

/* 文章专属相关阅读 (Related Articles) */
.article-related-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--hairline);
}

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

.article-related-card {
  padding: 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.article-related-card:hover {
  border-color: var(--seal-vermilion);
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
}

.article-related-card h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink-heavy);
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-related-card p {
  font-size: 0.86rem;
  color: var(--ink-light);
  line-height: 1.6;
  margin-bottom: 0;
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏并适配大点击区域
   =================================================================== */

@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-left {
    text-align: center;
  }
  
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .hero-trust-row {
    justify-content: center;
    flex-wrap: wrap;
  }

  .features-grid {
    grid-template-columns: 1fr;
    max-width: 580px;
    margin: 0 auto;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-6px);
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 580px;
    margin: 0 auto;
  }
  
  .showcase-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* 移动端隐藏中间导航，保持页面极简 */
  }
  
  .hero-title {
    font-size: 2.35rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
    min-height: 52px;
  }
  
  .footer-nav {
    flex-wrap: wrap;
    gap: 18px 24px;
  }
  
  .footer-nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  
  .article-content {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .pricing-card {
    padding: 30px 20px;
  }
  
  .price-num {
    font-size: 2.4rem;
  }
  
  .btn-lg {
    padding: 13px 24px;
    font-size: 1rem;
    min-height: 52px;
  }
}