/* ==========================================================================
   良心云 (Liangxin Cloud / FlyV) - 新国潮风骨官方样式表 (Guochao Style)
   色彩基底: 宣纸象牙白 #f3ede1 | 朱砂红 #b03a2e | 水墨黑 #1f1b18 | 描金 #c9a24b
   字体风貌: 楷体/宋体 典雅风骨 (Kaiti / Songti Serif Stack)
   意境定位: 庄重、厚重、自信、金石之诺 (Dignified, Weighty, Confident)
   ========================================================================== */

:root {
  /* 国潮五色主系 */
  --bg-ricepaper: #f3ede1;
  --bg-paper-card: #fcf9f2;
  --bg-paper-hover: #ffffff;
  
  --cinnabar: #b03a2e;         /* 朱砂红 */
  --cinnabar-dark: #8c271d;    /* 宿砂深红 */
  --cinnabar-light: #d9534f;   /* 浅茜红 */
  
  --gold: #c9a24b;             /* 赤金/泥金 */
  --gold-light: #ecd58a;       /* 浅金 */
  --gold-dark: #9f7823;        /* 古铜金 */
  --gold-gradient: linear-gradient(135deg, #c9a24b 0%, #edd893 50%, #a87e2a 100%);

  --ink-black: #1f1b18;        /* 焦墨黑 */
  --ink-text: #2d2621;         /* 浓墨 */
  --ink-muted: #6e645a;        /* 灰墨 */
  --ink-light: #9e9386;        /* 浅赭墨 */
  
  --border-paper: #dfd5c2;     /* 经卷纸边框 */
  --border-gold: rgba(201, 162, 75, 0.45);
  
  --bronze-bg: #27221e;        /* 青铜底色 */
  --bronze-border: #443c35;

  /* 传统文韵衬线字体栈 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "STKaiti", "KaiTi", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-kai: "STKaiti", "KaiTi", "Kaiti SC", "FangSong", "Noto Serif SC", serif;

  --shadow-sm: 0 2px 8px rgba(45, 38, 33, 0.06);
  --shadow-md: 0 6px 20px rgba(45, 38, 33, 0.08);
  --shadow-lg: 0 12px 36px rgba(45, 38, 33, 0.12);
  --shadow-seal: 0 4px 14px rgba(176, 58, 46, 0.28);
  
  --transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

/* 全局重置与纸张质感 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-serif);
  background-color: var(--bg-ricepaper);
  color: var(--ink-text);
  scroll-behavior: smooth;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  /* 宣纸纤维自然微纹理 */
  background-image: 
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.4) 0%, transparent 80%),
    radial-gradient(rgba(180, 160, 130, 0.05) 1px, transparent 0);
  background-size: 100% 100%, 24px 24px;
}

/* 动态背景 Canvas (墨韵流光与金粉粒子) */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 800;
  color: var(--ink-black);
  letter-spacing: 0.02em;
}

/* ==========================================================================
   顶部朱红横幅与回纹饰带 (Top Red Banner & Fret-Pattern Strip)
   ========================================================================== */
.top-red-banner {
  background-color: var(--cinnabar);
  color: #fff9f0;
  padding: 8px 0;
  font-family: var(--font-kai);
  font-size: 0.88rem;
  letter-spacing: 2px;
  box-shadow: 0 2px 10px rgba(176, 58, 46, 0.25);
  position: relative;
  z-index: 101;
}

.top-red-banner-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
  white-space: nowrap;
  gap: 12px;
  overflow: hidden;
}

.banner-guochao-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.2);
  padding: 2px 10px;
  border-radius: 2px;
  border: 1px solid rgba(236, 213, 138, 0.4);
  color: var(--gold-light);
  font-size: 0.8rem;
}

.banner-announcement {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 经典中华几何回纹带 (Fret Pattern Strip / Meander) */
.fret-pattern-strip {
  height: 7px;
  width: 100%;
  background: 
    repeating-linear-gradient(90deg, 
      var(--gold) 0px, var(--gold) 4px, 
      transparent 4px, transparent 10px, 
      var(--gold) 10px, var(--gold) 14px,
      transparent 14px, transparent 20px
    ),
    var(--cinnabar-dark);
  border-bottom: 1.5px solid var(--gold);
}

/* 导航栏 (Site Header) */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(243, 237, 225, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-paper);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 16px;
}

/* 朱红方印徽章 (Red Square Seal Logo - Vertical White Characters) */
.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

.red-seal-logo {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background-color: var(--cinnabar);
  color: #ffffff;
  font-family: var(--font-kai);
  font-weight: 900;
  font-size: 11px;
  line-height: 1.15;
  border: 2px solid #821c12;
  box-shadow: inset 0 0 0 2px #fbf8f2, 0 3px 8px rgba(176, 58, 46, 0.35);
  border-radius: 4px;
  text-align: center;
  letter-spacing: 1px;
  flex-shrink: 0;
  transition: var(--transition);
}

.red-seal-logo:hover {
  transform: scale(1.05) rotate(-3deg);
}

.brand-logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(45, 38, 33, 0.15));
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  white-space: nowrap;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--ink-black);
  white-space: nowrap;
}

.brand-tagline {
  font-size: 0.68rem;
  color: var(--cinnabar);
  font-family: var(--font-kai);
  font-weight: 700;
  letter-spacing: 1.5px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 24px);
  list-style: none;
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-muted);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
  word-break: keep-all;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cinnabar);
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--cinnabar);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

/* 国潮国风按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 3px;
  font-family: var(--font-kai);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 1.2px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  white-space: nowrap;
  word-break: keep-all;
}

.btn-primary {
  background: var(--cinnabar);
  color: #ffffff;
  border: 1px solid var(--cinnabar-dark);
  box-shadow: 0 4px 14px rgba(176, 58, 46, 0.28);
}

.btn-primary:hover {
  background: var(--cinnabar-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(176, 58, 46, 0.4);
}

.btn-gold {
  background: var(--gold-gradient);
  color: #272015;
  border: 1px solid var(--gold-dark);
  box-shadow: 0 4px 12px rgba(201, 162, 75, 0.3);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(201, 162, 75, 0.45);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink-text);
  border: 1px solid var(--border-paper);
}

.btn-outline:hover {
  background: #ffffff;
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.1rem;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--ink-black);
  margin: 5px 0;
  transition: var(--transition);
}

.mobile-nav-drawer {
  position: fixed;
  top: 110px;
  left: 0;
  width: 100%;
  height: calc(100vh - 110px);
  background: var(--bg-ricepaper);
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 16px;
  z-index: 99;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  border-bottom: 4px solid var(--cinnabar);
}

.mobile-nav-drawer.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-text);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-paper);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   竖排古典两翼装饰立柱 (writing-mode: vertical-rl)
   ========================================================================== */
.vertical-side-column {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-kai);
  font-size: 0.95rem;
  letter-spacing: 0.45em;
  color: var(--ink-muted);
  padding: 24px 10px;
  background: rgba(243, 237, 225, 0.75);
  border-right: 1.5px solid var(--gold);
  border-left: 1.5px solid var(--gold);
  backdrop-filter: blur(8px);
  z-index: 20;
  box-shadow: 0 4px 16px rgba(45, 38, 33, 0.06);
  user-select: none;
}

.vertical-side-left {
  left: 12px;
}

.vertical-side-right {
  right: 12px;
}

/* ==========================================================================
   Hero 主视觉区 (良心做云，童叟无欺 & 旋转朱砂印戳)
   ========================================================================== */
.hero-section {
  padding: 85px 0 65px;
  text-align: center;
  position: relative;
}

.hero-subtag-banner {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 20px;
  background: rgba(176, 58, 46, 0.08);
  border: 1px solid rgba(176, 58, 46, 0.35);
  border-radius: 2px;
  font-family: var(--font-kai);
  font-size: 0.92rem;
  color: var(--cinnabar);
  margin-bottom: 24px;
  letter-spacing: 2px;
}

.hero-title-container {
  position: relative;
  display: inline-block;
  margin-bottom: 24px;
}

/* 主标题: 「良心做云，童叟无欺」 */
.hero-headline {
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.08em;
  color: var(--ink-black);
}

.hero-headline-highlight {
  color: var(--cinnabar);
  position: relative;
  display: inline-block;
}

/* 旋转朱红印章戳 (Rotated Vermillion Seal Stamp) */
.vermillion-stamp {
  position: absolute;
  top: -18px;
  right: -55px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border: 2px solid var(--cinnabar);
  color: var(--cinnabar);
  font-family: var(--font-kai);
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 2.5px;
  transform: rotate(-12deg);
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px rgba(176, 58, 46, 0.4), 0 3px 8px rgba(176, 58, 46, 0.18);
  background: rgba(243, 237, 225, 0.85);
  user-select: none;
}

.hero-description {
  max-width: 820px;
  margin: 0 auto 36px;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--ink-muted);
  line-height: 1.9;
}

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

/* ==========================================================================
   青铜铭牌三大铭文 (Three Bronze-Plaque Inscriptions)
   ========================================================================== */
.bronze-plaques-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto;
}

.bronze-plaque {
  background: var(--bronze-bg);
  border: 2px solid var(--gold);
  border-radius: 4px;
  padding: 28px 20px;
  text-align: center;
  position: relative;
  box-shadow: 
    inset 0 0 15px rgba(0, 0, 0, 0.7),
    0 8px 24px rgba(45, 38, 33, 0.15);
  transition: var(--transition);
}

.bronze-plaque::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  border: 1px solid rgba(201, 162, 75, 0.4);
  pointer-events: none;
}

.bronze-plaque:hover {
  transform: translateY(-4px);
  border-color: var(--gold-light);
  box-shadow: 
    inset 0 0 20px rgba(0, 0, 0, 0.8),
    0 12px 30px rgba(201, 162, 75, 0.25);
}

.plaque-seal-tag {
  display: inline-block;
  font-family: var(--font-kai);
  font-size: 0.8rem;
  color: var(--gold);
  letter-spacing: 2px;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.plaque-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 6px;
  letter-spacing: 1px;
}

.plaque-desc {
  font-family: var(--font-kai);
  font-size: 0.92rem;
  color: #dfd7cc;
  letter-spacing: 1.5px;
}

/* 章节通用标题 (传统中式题额) */
.section-header {
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-kai);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--cinnabar);
  margin-bottom: 8px;
  position: relative;
}

.section-tag::before, .section-tag::after {
  content: "❖";
  font-size: 0.75rem;
  color: var(--gold);
  margin: 0 8px;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.7rem);
  letter-spacing: 2px;
  margin-bottom: 12px;
  color: var(--ink-black);
}

.section-subtitle {
  max-width: 680px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   六大典雅特性卡片 (编号 壹/贰/叁/肆/伍/陆，4px朱砂红顶边，朱印标牌)
   ========================================================================== */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-box {
  background: var(--bg-paper-card);
  border: 1px solid var(--border-paper);
  border-top: 4px solid var(--cinnabar);
  border-radius: 3px;
  padding: 32px 26px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-box:hover {
  background: var(--bg-paper-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--gold);
  border-top-color: var(--cinnabar);
}

.feature-header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

/* 朱印印章标牌 (壹/贰/叁) */
.feature-seal-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--cinnabar);
  color: #ffffff;
  font-family: var(--font-kai);
  font-size: 1.15rem;
  font-weight: 900;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1.5px #fbf8f2, 0 2px 6px rgba(176, 58, 46, 0.3);
  letter-spacing: 0;
}

.feature-traditional-icon {
  font-size: 1.6rem;
  color: var(--gold);
}

.feature-title {
  font-size: 1.28rem;
  margin-bottom: 12px;
  color: var(--ink-black);
  letter-spacing: 1px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--ink-muted);
  line-height: 1.8;
}

/* ==========================================================================
   价格区域 (核心需求: "所有价格要同排" / 典雅折页同排展示)
   ========================================================================== */
.pricing-section {
  padding: 80px 0;
  background: rgba(235, 227, 212, 0.45);
  border-top: 1px solid var(--border-paper);
  border-bottom: 1px solid var(--border-paper);
}

.pricing-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 38px;
}

.pricing-tabs {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-paper);
  padding: 4px;
  border-radius: 4px;
  gap: 6px;
}

.pricing-tab-btn {
  background: none;
  border: none;
  font-family: var(--font-kai);
  font-weight: 700;
  font-size: 0.96rem;
  padding: 8px 24px;
  border-radius: 2px;
  cursor: pointer;
  color: var(--ink-muted);
  letter-spacing: 1px;
  transition: var(--transition);
}

.pricing-tab-btn.active {
  background: var(--cinnabar);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(176, 58, 46, 0.25);
}

/* 同排价格容器 (桌面端 5 列一字排开，典雅竹简/经卷风骨) */
.pricing-row-container {
  display: grid;
  grid-template-columns: repeat(5, minmax(215px, 1fr));
  gap: 16px;
  align-items: stretch;
  width: 100%;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-top: 4px solid var(--cinnabar);
  border-radius: 3px;
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--gold);
  border-top-color: var(--cinnabar);
}

.pricing-card.featured {
  border-color: var(--gold);
  border-top: 5px solid var(--cinnabar);
  background: #fffdf9;
  box-shadow: 0 8px 24px rgba(201, 162, 75, 0.2);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cinnabar);
  color: #ffffff;
  font-family: var(--font-kai);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: 2px;
  letter-spacing: 1.5px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(176, 58, 46, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.pricing-card-header {
  text-align: center;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-paper);
}

.plan-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.plan-desc {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-bottom: 14px;
  font-family: var(--font-kai);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.plan-currency {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--cinnabar);
}

.plan-price {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
}

.plan-period {
  font-size: 0.85rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
}

.plan-annually {
  font-size: 0.78rem;
  color: var(--gold-dark);
  margin-top: 4px;
  font-weight: 700;
  font-family: var(--font-kai);
}

.plan-features {
  list-style: none;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-grow: 1;
}

.plan-feature-item {
  font-size: 0.85rem;
  color: var(--ink-text);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

.plan-feature-icon {
  color: var(--cinnabar);
  font-weight: 900;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.plan-btn {
  width: 100%;
}

.pricing-footnote {
  text-align: center;
  margin-top: 30px;
  font-size: 0.88rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
  letter-spacing: 1px;
}

/* 客户端支持区域 (经卷风格) */
.clients-section {
  padding: 80px 0;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.client-item {
  background: var(--bg-paper-card);
  border: 1px solid var(--border-paper);
  border-top: 3px solid var(--gold);
  border-radius: 3px;
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
}

.client-item:hover {
  background: #ffffff;
  border-color: var(--cinnabar);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.client-icon {
  font-size: 2.4rem;
  margin-bottom: 10px;
}

.client-name {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.client-sub {
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
  margin-bottom: 14px;
}

/* ==========================================================================
   深度文章展示区域 (8篇经义矩阵)
   ========================================================================== */
.articles-section {
  padding: 80px 0;
  background: rgba(235, 227, 212, 0.4);
  border-top: 1px solid var(--border-paper);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-top: 4px solid var(--cinnabar);
  border-radius: 3px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--gold);
  border-top-color: var(--cinnabar);
}

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

.article-badge {
  padding: 2px 10px;
  border-radius: 2px;
  background: rgba(176, 58, 46, 0.1);
  color: var(--cinnabar);
  font-weight: 700;
  font-size: 0.78rem;
  border: 1px solid rgba(176, 58, 46, 0.25);
}

.article-title {
  font-size: 1.2rem;
  margin-bottom: 12px;
  line-height: 1.45;
  color: var(--ink-black);
}

.article-excerpt {
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.75;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px dashed var(--border-paper);
}

.article-keywords {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.kw-tag {
  font-size: 0.75rem;
  color: var(--cinnabar);
  background: rgba(176, 58, 46, 0.06);
  padding: 2px 8px;
  border-radius: 2px;
  font-family: var(--font-kai);
}

.read-more-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--cinnabar);
  font-family: var(--font-kai);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  color: var(--cinnabar-dark);
  transform: translateX(3px);
}

/* ==========================================================================
   用户口碑评价 (口碑如碑，口传心授)
   ========================================================================== */
.reviews-section {
  padding: 80px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-top: 3px solid var(--gold);
  border-radius: 3px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--cinnabar);
}

.review-stars {
  color: var(--gold);
  font-size: 1.1rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-content {
  font-size: 0.95rem;
  color: var(--ink-text);
  line-height: 1.8;
  margin-bottom: 20px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px dashed var(--border-paper);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 3px;
  background: var(--cinnabar);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-kai);
  font-weight: 900;
  color: #ffffff;
  font-size: 1.1rem;
  box-shadow: inset 0 0 0 1px #fff;
}

.author-name {
  font-size: 0.96rem;
  font-weight: 800;
  color: var(--ink-black);
}

.author-role {
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
}

/* ==========================================================================
   常见问题 FAQ (百问释疑)
   ========================================================================== */
.faq-section {
  padding: 80px 0;
  background: rgba(235, 227, 212, 0.4);
  border-top: 1px solid var(--border-paper);
}

.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-left: 4px solid var(--gold);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-item:hover {
  border-left-color: var(--cinnabar);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  color: var(--ink-black);
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  letter-spacing: 0.5px;
}

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

.faq-icon {
  font-size: 1.2rem;
  color: var(--cinnabar);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--ink-muted);
  font-size: 0.96rem;
  line-height: 1.85;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 24px 22px 24px;
}

/* CTA 卷轴横幅 (Imperial Scroll Call to Action) */
.cta-banner {
  background: 
    linear-gradient(135deg, rgba(176, 58, 46, 0.95) 0%, rgba(140, 39, 29, 0.98) 100%);
  border: 2px solid var(--gold);
  border-radius: 4px;
  padding: 60px 40px;
  text-align: center;
  margin: 40px 0 80px;
  color: #fff9f0;
  position: relative;
  box-shadow: 
    inset 0 0 20px rgba(0, 0, 0, 0.4),
    0 12px 36px rgba(176, 58, 46, 0.28);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  border: 1px solid rgba(236, 213, 138, 0.4);
  pointer-events: none;
}

.cta-title {
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.cta-desc {
  max-width: 660px;
  margin: 0 auto 32px;
  color: #f7ede1;
  font-size: 1.1rem;
  font-family: var(--font-kai);
  letter-spacing: 1.5px;
}

/* 权威外链生态伙伴 */
.partners-section {
  padding: 50px 0 70px;
  border-top: 1px solid var(--border-paper);
}

.partners-title {
  text-align: center;
  font-family: var(--font-kai);
  font-size: 1rem;
  color: var(--ink-muted);
  letter-spacing: 3px;
  margin-bottom: 24px;
}

.partners-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.partner-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-radius: 2px;
  font-size: 0.88rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
  transition: var(--transition);
}

.partner-link:hover {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
  box-shadow: var(--shadow-sm);
}

/* 页脚 (Site Footer) */
.site-footer {
  background: #1c1815;
  color: #e5ded3;
  border-top: 4px solid var(--cinnabar);
  padding: 60px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

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

.footer-brand .brand-name {
  color: #ffffff;
}

.footer-desc {
  font-size: 0.9rem;
  color: #a89f92;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 18px;
  letter-spacing: 1.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: #b8aea1;
  font-family: var(--font-kai);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.85rem;
  color: #8c8275;
  font-family: var(--font-kai);
  flex-wrap: wrap;
  gap: 16px;
}

/* 移动端吸底浮条 (Sticky Bar) */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(243, 237, 225, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 2px solid var(--cinnabar);
  padding: 12px 20px;
  z-index: 95;
  box-shadow: 0 -4px 16px rgba(45, 38, 33, 0.1);
}

.mobile-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.mobile-sticky-price {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--cinnabar);
}

.mobile-sticky-sub {
  font-size: 0.75rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
}

/* ==========================================================================
   文章详情页古典版式 (Article Detail Guochao Layout)
   ========================================================================== */
.article-header {
  padding: 60px 0 30px;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--ink-light);
  font-family: var(--font-kai);
  margin-bottom: 20px;
}

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

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

.article-page-title {
  font-size: clamp(2rem, 3.8vw, 2.7rem);
  line-height: 1.35;
  margin-bottom: 16px;
  color: var(--ink-black);
}

.article-page-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--ink-muted);
  font-family: var(--font-kai);
  flex-wrap: wrap;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 40px;
  padding: 30px 0 80px;
}

.article-content {
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-top: 5px solid var(--cinnabar);
  border-radius: 4px;
  padding: 45px;
  color: var(--ink-text);
  font-size: 1.05rem;
  line-height: 1.9;
  box-shadow: var(--shadow-sm);
}

.article-content h2 {
  font-size: 1.65rem;
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-paper);
  color: var(--ink-black);
  position: relative;
}

.article-content h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--cinnabar);
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 30px 0 14px;
  color: var(--cinnabar);
}

.article-content p {
  margin-bottom: 22px;
  text-align: justify;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 28px;
}

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

.article-content strong {
  color: var(--ink-black);
  font-weight: 800;
}

.article-content a {
  color: var(--cinnabar);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
}

.article-content a:hover {
  color: var(--cinnabar-dark);
}

.article-callout {
  background: rgba(176, 58, 46, 0.05);
  border-left: 4px solid var(--cinnabar);
  padding: 18px 24px;
  border-radius: 2px;
  margin: 28px 0;
  font-size: 0.98rem;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.92rem;
}

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

.article-table th {
  background: #f8f4ec;
  color: var(--ink-black);
  font-weight: 800;
}

.article-table td {
  background: #ffffff;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: #ffffff;
  border: 1px solid var(--border-paper);
  border-top: 3px solid var(--gold);
  border-radius: 3px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 1.15rem;
  margin-bottom: 16px;
  color: var(--ink-black);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-links a {
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.5;
  display: block;
  font-family: var(--font-kai);
}

.sidebar-links a:hover {
  color: var(--cinnabar);
}

/* ==========================================================================
   响应式断点自适应 (Responsive Queries)
   ========================================================================== */
@media (max-width: 1280px) {
  .vertical-side-column {
    display: none; /* 视口小于 1280px 时隐藏两翼立柱避免遮挡内容 */
  }
  .nav-links {
    gap: 14px;
  }
  .nav-link {
    font-size: 0.9rem;
  }
  .brand-tagline {
    display: none; /* 紧凑视口下精简副标，腾出横向空间保证文字并行 */
  }
}

@media (max-width: 1100px) {
  .pricing-row-container {
    overflow-x: auto;
    padding-bottom: 16px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
  .pricing-card {
    scroll-snap-align: start;
    min-width: 235px;
  }
  .bronze-plaques-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

/* 导航断点提前至 1040px，彻底避免 768~1040px 区间文字挤压换行折断 */
@media (max-width: 1040px) {
  .nav-links, .nav-actions .btn-outline {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .top-red-banner {
    display: none;
  }
  .hero-section {
    padding: 45px 0 35px;
  }
  .hero-headline {
    font-size: 2.3rem;
  }
  .vermillion-stamp {
    position: static;
    display: inline-block;
    margin-top: 10px;
    transform: rotate(-6deg);
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .mobile-sticky-bar {
    display: block;
  }
  body {
    padding-bottom: 70px;
  }
  .article-content {
    padding: 24px 18px;
  }
}