/* ==========================================================================
   悠兔机场加速器 (youtu-jichang.mom) - 官网样式表
   视觉风格：T03 黑金商务 | 背景风格：B03 黑金商务 | 品牌配色：C02 午夜蓝 × 香槟金
   排版结构：L04 非对称 Bento | 字体风格：F11 商务稳重 | 卡片：K11 细金属边框
   ========================================================================== */

:root {
  --bg-deep: #0B0E14;
  --bg-surface: #121620;
  --bg-elevated: #181E2B;
  --primary-gold: #D4AF37;
  --primary-gold-light: #F3E5AB;
  --primary-gold-dark: #AA771C;
  --border-metal: rgba(212, 175, 55, 0.22);
  --border-metal-hover: rgba(212, 175, 55, 0.65);
  --border-subtle: #202738;
  --text-white: #F8FAFC;
  --text-body: #CBD5E1;
  --text-muted: #8E9BAE;
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --shadow-gold: 0 10px 30px rgba(212, 175, 55, 0.12);
  --shadow-dark: 0 16px 40px rgba(0, 0, 0, 0.6);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* 基础重置与深色基调 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-deep);
  color: var(--text-body);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(212, 175, 55, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(30, 41, 59, 0.3) 0%, transparent 50%);
  background-attachment: fixed;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

button, input {
  font: inherit;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 商务稳重排版 */
h1, h2, h3, h4 {
  color: var(--text-white);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px;
}

.metal-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-gold);
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid var(--border-metal);
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.3rem;
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* 按钮体系 - 沉稳黑金高光 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, #F3E5AB 0%, #D4AF37 50%, #AA771C 100%);
  color: #0B0E14;
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.35);
  font-weight: 700;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(212, 175, 55, 0.5);
  filter: brightness(1.08);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-white);
  border: 1px solid var(--border-metal);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--primary-gold);
  color: var(--primary-gold);
  transform: translateY(-2px);
}

/* 顶部导航 - N03 黑金商务导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 品牌：严格只显示 金色兔子Logo + 悠兔 */
.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-img {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.brand-text {
  font-size: 1.55rem;
  font-weight: 800;
  background: linear-gradient(135deg, #FFF 0%, #F3E5AB 50%, #D4AF37 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.04em;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #D4AF37, transparent);
  transition: width 0.25s ease;
}

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

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

.search-trigger-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.search-trigger-btn:hover {
  border-color: var(--border-metal);
  color: var(--primary-gold);
}

.search-shortcut {
  font-size: 0.72rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-muted);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--primary-gold);
}

/* Hero 区域 - 方案A：上主卡，下双卡并排规整 Bento 组合（黑金宇宙与金色地球主视觉） */
.hero-section {
  padding: 64px 0 60px;
  position: relative;
  background-color: #070D18;
  background-image: linear-gradient(90deg, #070D18 0%, #070D18 35%, rgba(7, 13, 24, 0.65) 55%, rgba(7, 13, 24, 0.15) 75%), url('../assets/visual/youtu_jichang_mom image.jpg');
  background-repeat: no-repeat;
  background-position: right center;
  background-size: cover;
  overflow: hidden;
}

.hero-container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 580px;
  position: relative;
}

/* 方案A：统一左侧 1+2 规整 Bento 组合集群 */
.hero-bento-cluster {
  max-width: 580px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  z-index: 2;
}

/* 第一排：主展格（Bento 主卡） */
.bento-card-main {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  background: rgba(10, 16, 28, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(212, 175, 55, 0.24);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.65);
  position: relative;
  overflow: hidden;
}

.metal-badge-icon {
  vertical-align: middle;
  margin-right: 6px;
  display: inline-block;
}

.bento-card-main::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--text-white);
  letter-spacing: -0.01em;
}

.hero-title-brand {
  display: inline-block;
  white-space: nowrap;
}

.hero-title-brand::after {
  content: " ｜ ";
  color: rgba(212, 175, 55, 0.4);
  font-weight: 300;
  margin: 0 4px;
}

.hero-title-sub {
  background: linear-gradient(135deg, #F3E5AB 0%, #D4AF37 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-mobile-visual {
  display: none;
}

/* 第二排：双卡并排规整带状区（等宽、等高、顶部与底部严格对齐） */
.bento-sub-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  margin: 0;
  box-sizing: border-box;
  align-items: stretch;
}

/* Bento 子卡 A & B（等宽 1fr 1fr，等高，内部垂直两端对齐） */
.bento-sub-card {
  background: rgba(12, 18, 30, 0.76);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-sizing: border-box;
  box-shadow: var(--shadow-dark);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.bento-sub-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.bento-sub-card:hover {
  border-color: var(--border-metal-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.8);
}

a.bento-sub-card {
  text-decoration: none;
  color: inherit;
  display: flex;
  cursor: pointer;
}

.bento-action-link {
  margin-top: 18px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.bento-sub-card:hover .bento-action-link {
  color: var(--primary-gold-light);
  transform: translateX(4px);
}

.bento-metric-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary-gold);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.bento-metric-title {
  font-size: 1.15rem;
  color: var(--text-white);
  margin-bottom: 8px;
}

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

/* 技术拓扑与架构专区 - 导入 section-bg-01 黑金纹理背景 */
.tech-architecture-section {
  padding: 85px 0;
  position: relative;
  background-color: #0E121A;
  background-image: url('../assets/visual/section-bg-01.webp');
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.arch-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  transition: var(--transition);
}

.arch-card:hover {
  border-color: var(--border-metal-hover);
  transform: translateY(-4px);
}

.arch-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-metal);
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.arch-icon-img {
  width: 32px;
  height: 32px;
  display: block;
}

.arch-title {
  font-size: 1.22rem;
  margin-bottom: 12px;
}

.arch-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 生态支持区 - 暖白商务卡片风格 (#F6F3EC) */
.ecosystem-section {
  padding: 80px 0;
}

.eco-matrix-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 14px;
  max-width: 1100px;
  margin: 0 auto;
  align-items: stretch;
}

.eco-matrix-item {
  background: #F6F3EC;
  color: #111827;
  border: 1px solid #E5DBCB;
  border-radius: var(--radius-md);
  padding: 18px 10px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 124px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  box-sizing: border-box;
}

.eco-matrix-item:hover {
  border-color: #D4AF37;
  transform: translateY(-3px);
  background: #F6F3EC;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.eco-matrix-logo {
  height: 30px;
  width: auto;
  max-width: 110px;
  object-fit: contain;
  margin: 0 auto 8px;
  display: block;
  flex-shrink: 0;
}

.eco-matrix-desc {
  font-size: 13px;
  color: #41454D;
  line-height: 1.45;
  font-weight: 500;
  text-align: center;
  margin: 0;
  width: 100%;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  word-break: break-word;
}

/* 套餐展示区 - 导入 section-bg-02 黑金光轨背景（展示悠兔官方真实核实套餐） */
.pricing-section {
  padding: 90px 0;
  position: relative;
  background-color: #0E121A;
  background-image: url('../assets/visual/section-bg-02.webp');
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
  border-top: 1px solid var(--border-subtle);
}

.pricing-notice-wrap {
  text-align: center;
  margin-bottom: 42px;
}

.pricing-notice {
  display: inline-block;
  background: rgba(212, 175, 55, 0.08);
  border: 1px dashed var(--border-metal);
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 8px 24px;
  border-radius: var(--radius-pill);
}

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

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-dark);
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  border-color: var(--border-metal-hover);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.pricing-card.featured {
  border: 2px solid var(--primary-gold);
  background: linear-gradient(145deg, #161D2B 0%, #11151F 100%);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
}

.featured-gold-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #F3E5AB 0%, #D4AF37 100%);
  color: #0B0E14;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 3px 18px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-gold);
}

.plan-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 22px;
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.55rem;
  margin-bottom: 4px;
  color: var(--text-white);
}

.plan-price-wrap {
  margin: 16px 0 10px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 3px;
}

.plan-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-gold);
}

.plan-price-num {
  font-size: 2.65rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1;
}

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

.plan-scope {
  font-size: 0.9rem;
  color: var(--primary-gold);
  font-weight: 500;
}

.plan-specs {
  margin-bottom: 30px;
  flex-grow: 1;
}

.spec-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.94rem;
  color: var(--text-body);
}

.spec-item svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--primary-gold);
  margin-top: 4px;
}

.plan-footer {
  text-align: center;
}

.plan-tip {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* 用户反馈模块（严格执行最新模拟评价规范） */
.testimonials-section {
  padding: 80px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  position: relative;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--border-metal-hover);
  transform: translateY(-4px);
}

.card-sample-tag {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.74rem;
  color: var(--primary-gold);
  border: 1px solid var(--border-metal);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.stars-row {
  color: var(--primary-gold);
  font-size: 1rem;
  letter-spacing: 3px;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-body);
  margin-bottom: 18px;
}

.testimonial-meta {
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* FAQ 商务折叠行 */
.faq-section {
  padding: 80px 0;
  background: #0E121A;
  border-top: 1px solid var(--border-subtle);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 12px;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-white);
  transition: var(--transition);
}

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

.faq-icon {
  width: 22px;
  height: 22px;
  color: var(--primary-gold);
  transition: transform 0.28s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding-bottom: 20px;
}

/* 科普文章预览网格 */
.articles-preview-section {
  padding: 80px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--border-metal-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-dark);
}

.article-tag {
  color: var(--primary-gold);
  background: rgba(212, 175, 55, 0.1);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
}

.article-title {
  font-size: 1.2rem;
  margin: 14px 0 10px;
  line-height: 1.45;
  color: var(--text-white);
}

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

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link {
  color: var(--primary-gold);
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  gap: 10px;
  color: var(--primary-gold-light);
}

/* 统一 CTA 转化带 - 导入 cta-banner.png 黑金横幅背景 */
.cta-banner-section {
  padding: 60px 0;
}

.cta-banner-box {
  background-color: #10141D;
  background-image: linear-gradient(135deg, rgba(24, 30, 43, 0.88), rgba(16, 20, 29, 0.94)), url('../assets/visual/cta-banner.webp');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  box-shadow: var(--shadow-dark);
  position: relative;
  overflow: hidden;
}

.cta-banner-title {
  font-size: 2.4rem;
  margin-bottom: 14px;
  color: var(--text-white);
}

.cta-banner-desc {
  max-width: 680px;
  margin: 0 auto 32px;
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* 页脚 - 4个固定独立入口规范 */
.site-footer {
  background-color: #07090D;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-desc {
  max-width: 440px;
  line-height: 1.7;
}

.footer-col-title {
  font-size: 1.1rem;
  color: var(--text-white);
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: var(--primary-gold);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-slogan {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

.footer-disclaimer {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 文章详情页专用排版 */
.page-header {
  padding: 54px 0 34px;
  text-align: center;
  background-color: #0E121A;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 40px;
}

.page-title {
  font-size: 2.3rem;
  margin-bottom: 12px;
}

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

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

.article-content-container {
  max-width: 860px;
  margin: 0 auto 60px;
  background: var(--bg-surface);
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-dark);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.9;
}

.article-content h2 {
  font-size: 1.65rem;
  color: var(--primary-gold);
  margin: 38px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 26px 0 12px;
  color: var(--text-white);
}

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

.article-content ul, .article-content ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

.article-content ul {
  list-style: disc;
}

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

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

.article-content blockquote {
  border-left: 4px solid var(--primary-gold);
  background-color: var(--bg-elevated);
  padding: 18px 22px;
  margin: 26px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-nav-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  margin-top: 36px;
}

/* 搜索模态框 */
.search-modal {
  position: fixed;
  inset: 0;
  background: rgba(7, 9, 13, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 100px;
  padding-left: 20px;
  padding-right: 20px;
}

.search-modal.active {
  display: flex;
}

.search-box {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 640px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.9);
  border: 1px solid var(--border-metal);
  overflow: hidden;
}

.search-header {
  display: flex;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  gap: 12px;
}

.search-input {
  flex-grow: 1;
  border: none;
  outline: none;
  font-size: 1.1rem;
  color: var(--text-white);
  background: transparent;
}

.search-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.4rem;
  padding: 4px;
}

.search-results-list {
  max-height: 380px;
  overflow-y: auto;
  padding: 12px;
}

.search-item {
  display: block;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  margin-bottom: 6px;
}

.search-item:hover {
  background-color: var(--bg-elevated);
}

.search-item-title {
  font-weight: 700;
  color: var(--primary-gold);
  margin-bottom: 4px;
}

.search-item-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .bento-hero-grid {
    grid-template-columns: 1fr;
  }
  .bento-card-main {
    grid-row: auto;
  }
  .arch-grid {
    grid-template-columns: 1fr;
  }
  .eco-matrix-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
  }
  .eco-matrix-item {
    flex: 0 0 148px;
    width: 148px;
    height: 124px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 10px 0;
  }
  .brand-logo-img {
    width: 34px;
    height: 34px;
  }
  .brand-text {
    font-size: 1.35rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .nav-actions {
    gap: 8px;
    flex-shrink: 0;
  }
  /* 移动端保留紧凑注册按钮，全站唯一注册入口 */
  .nav-actions .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: 6px;
    white-space: nowrap;
    line-height: 1.2;
  }
  /* 移动端搜索按钮转为40x40纯图标，隐藏文字和Ctrl+K，彻底杜绝文字竖排折行问题 */
  .search-trigger-btn {
    padding: 8px;
    width: 40px;
    height: 40px;
    justify-content: center;
    border-radius: 50%;
  }
  .search-trigger-btn span,
  .search-trigger-btn .search-shortcut {
    display: none;
  }
  .hero-section {
    padding: 36px 0 26px;
    background-image: none;
    text-align: center;
  }
  .hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: auto;
  }
  .hero-bento-cluster {
    max-width: 100%;
    margin: 0 auto;
    gap: 14px;
  }
  .bento-card-main {
    max-width: 100%;
    text-align: center;
    margin: 0 auto;
    padding: 26px 18px;
  }
  .hero-title {
    font-size: 2.05rem;
    line-height: 1.35;
    word-break: keep-all;
    overflow-wrap: break-word;
  }
  .hero-desc {
    font-size: 0.98rem;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 22px;
  }
  .hero-buttons {
    justify-content: center;
    margin-bottom: 0;
  }
  .hero-mobile-visual {
    display: block;
    width: 100%;
    margin: 6px 0 10px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(212, 175, 55, 0.25);
    background-color: #0A0E17;
  }
  .hero-mobile-art {
    width: 100%;
    height: 240px;
    object-fit: cover;
    object-position: right center;
    display: block;
  }
  .bento-sub-row {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 0;
  }
  .bento-sub-card {
    text-align: left;
    padding: 20px 18px;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #0B0E14;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-dark);
    gap: 16px;
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-menu-cta {
    display: none !important;
  }
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
  }
  .eco-matrix-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
  .eco-matrix-item {
    flex: 0 0 140px;
    width: 140px;
    height: 120px;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .article-content-container {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .eco-matrix-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  .eco-matrix-item {
    flex: 0 0 calc(50% - 5px);
    width: calc(50% - 5px);
    max-width: calc(50% - 5px);
    height: 112px;
    padding: 14px 6px;
  }
  .eco-matrix-logo {
    height: 26px;
    max-width: 85px;
    margin-bottom: 6px;
  }
  .eco-matrix-desc {
    font-size: 12px;
    height: 34px;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 1.72rem;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .hero-buttons .btn {
    width: 100%;
  }
}

@media (max-width: 360px) {
  .brand-text {
    font-size: 1.15rem;
  }
  .brand-logo-img {
    width: 28px;
    height: 28px;
  }
  .nav-actions {
    gap: 4px;
  }
  .nav-actions .btn {
    padding: 5px 8px;
    font-size: 0.78rem;
  }
  .search-trigger-btn {
    width: 34px;
    height: 34px;
  }
  .mobile-toggle {
    width: 34px;
    height: 34px;
  }
  .hero-title {
    font-size: 1.55rem;
  }
}