/* ====================================================================
   STYLE 55 — ROYAL JEWELRY HOUSE
   品牌：泡泡狗 (paopaodog.autos)
   视觉：神秘、贵气、优雅、戏剧化 — 皇家珠宝盒殿堂风范
   基调：Obsidian 黑曜石 / Deep Burgundy 勃艮第丝绒 / Champagne Gold 香槟金
   宝石专色：Sapphire Blue 皇家蓝宝石 (#0f52ba, #2563eb)
   ==================================================================== */

:root {
  /* 基础底色 (Obsidian & Velvet Burgundy) */
  --color-obsidian-deep: #08090c;
  --color-obsidian: #0e1017;
  --color-obsidian-card: #131620;
  --color-obsidian-light: #1a1e2b;
  --color-burgundy-dark: #190810;
  --color-burgundy-soft: #280e1b;

  /* 黄金体系 (Champagne & Antique Gold) */
  --color-gold-champagne: #d4af37;
  --color-gold-light: #f3e5ab;
  --color-gold-glow: rgba(212, 175, 55, 0.28);
  --color-gold-border: rgba(212, 175, 55, 0.38);
  --color-gold-border-bright: rgba(212, 175, 55, 0.85);
  --color-gold-antique: #99793d;
  --color-gold-deep: #665026;

  /* 宝石单色 (Sapphire Blue Accent) */
  --color-gemstone: #0f52ba;
  --color-gemstone-bright: #3b82f6;
  --color-gemstone-glow: rgba(15, 82, 186, 0.35);
  --color-gemstone-subtle: rgba(15, 82, 186, 0.12);

  /* 文字体系 (Ivory, Platinum & Muted Gold) */
  --color-ivory: #fcfbf7;
  --color-platinum: #e2e5eb;
  --color-text-muted: #9ba3b5;
  --color-text-dim: #6b7280;

  /* 结构线条 */
  --color-border-hairline: rgba(212, 175, 55, 0.2);
  --color-border-card: rgba(212, 175, 55, 0.26);

  /* 字体系统 (零外部网络字体加载，高对比度古典衬线 + 优雅现代无衬线) */
  --font-serif: "Didot", "Bodoni MT", "Cinzel", "Songti SC", "SimSun", "STSong", "Noto Serif SC", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* 尺寸与投影 */
  --max-width: 1160px;
  --max-article-width: 820px;
  --radius-frame: 6px;
  --shadow-velvet: 0 16px 40px -8px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(212, 175, 55, 0.18);
  --shadow-jewel-hover: 0 20px 48px -6px rgba(0, 0, 0, 0.95), 0 0 28px rgba(212, 175, 55, 0.32);
  --transition-haute: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.72;
  color: var(--color-platinum);
  background-color: var(--color-obsidian-deep);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--color-obsidian-deep);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(40, 14, 27, 0.65), transparent 75%),
    radial-gradient(circle at 85% 30%, rgba(15, 82, 186, 0.12), transparent 45%),
    radial-gradient(circle at 15% 70%, rgba(212, 175, 55, 0.06), transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(25, 8, 16, 0.8), transparent 70%);
  background-attachment: fixed;
  padding-bottom: 72px;
}

@media (min-width: 769px) {
  body {
    padding-bottom: 0;
  }
}

a {
  color: var(--color-gold-champagne);
  text-decoration: none;
  transition: var(--transition-haute);
}

a:hover {
  color: var(--color-gold-light);
  text-shadow: 0 0 8px rgba(212, 175, 55, 0.4);
}

/* 键盘可访问性焦点 */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--color-gold-champagne);
  outline-offset: 3px;
}

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

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

/* ================= 顶部导航 (Royal Salon Header) ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 16, 23, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-hairline);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-ivory);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-gold-light);
  text-decoration: none;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.18), rgba(15, 82, 186, 0.25));
  border: 1px solid var(--color-gold-border);
  border-radius: 4px;
  color: var(--color-gold-champagne);
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.2);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  font-weight: 500;
  color: var(--color-platinum);
  position: relative;
  padding: 6px 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold-champagne), transparent);
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: var(--color-gold-light);
  text-decoration: none;
}

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

.header-cta {
  display: flex;
  align-items: center;
}

/* 移动端菜单切换按钮 */
.menu-toggle {
  display: none;
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid var(--color-gold-border);
  padding: 8px 10px;
  border-radius: 4px;
  color: var(--color-gold-champagne);
  cursor: pointer;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-group {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background-color: var(--color-obsidian);
    border-bottom: 1px solid var(--color-gold-border);
    padding: 24px 20px;
    box-shadow: var(--shadow-velvet);
    flex-direction: column;
    gap: 18px;
  }

  .nav-group.is-active {
    display: flex;
  }

  .main-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    width: 100%;
  }

  .main-nav a {
    display: block;
    width: 100%;
    padding: 8px 0;
    font-size: 1.02rem;
  }

  .header-cta {
    width: 100%;
    padding-top: 14px;
    border-top: 1px solid var(--color-border-hairline);
  }

  .header-cta .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

/* ================= 皇家珠宝按键 (Jewelry House CTA) ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 0.96rem;
  letter-spacing: 0.12em;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-frame);
  cursor: pointer;
  text-decoration: none;
  line-height: 1.4;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: var(--transition-haute);
}

/* 主 CTA: 丝绒黑曜石底 + 璀璨金边 + 宝石点缀 */
.btn-primary {
  background: linear-gradient(180deg, #181c28 0%, #0d0f15 100%);
  color: var(--color-gold-champagne);
  border: 1px solid var(--color-gold-champagne);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6), inset 0 1px 1px rgba(243, 229, 171, 0.3);
}

.btn-primary::before {
  content: "◆";
  font-size: 0.65rem;
  color: var(--color-gold-light);
  display: inline-block;
  transition: transform 0.4s ease;
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.25), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover {
  color: #ffffff;
  border-color: var(--color-gold-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.35), 0 0 16px rgba(15, 82, 186, 0.4);
  text-decoration: none;
}

.btn-primary:hover::before {
  transform: rotate(180deg) scale(1.2);
  color: var(--color-gemstone-bright);
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-secondary {
  background: rgba(19, 22, 32, 0.7);
  color: var(--color-platinum);
  border: 1px solid var(--color-gold-border);
}

.btn-secondary:hover {
  color: var(--color-gold-champagne);
  border-color: var(--color-gold-champagne);
  background: rgba(26, 30, 43, 0.9);
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.08rem;
}

/* ================= 殿宇入口 (Hero: The Grand Palace Gate) ================= */
.hero-section {
  padding: 84px 0 72px;
  position: relative;
  border-bottom: 1px solid var(--color-border-hairline);
  background: radial-gradient(ellipse 90% 65% at 50% 20%, rgba(40, 14, 27, 0.7), transparent 80%);
}

.hero-wrapper {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--color-gold-champagne);
  background: rgba(14, 16, 23, 0.85);
  border: 1px solid var(--color-gold-border);
  padding: 6px 18px;
  border-radius: 30px;
  margin-bottom: 28px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-gemstone-bright);
  box-shadow: 0 0 8px var(--color-gemstone-bright);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-ivory);
  margin-bottom: 22px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.8);
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--color-platinum);
  margin-bottom: 38px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  border-top: 1px solid var(--color-border-hairline);
  padding-top: 36px;
  margin-top: 24px;
}

.metric-item {
  text-align: center;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 20%;
  right: 0;
  height: 60%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--color-border-hairline), transparent);
}

.metric-value {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--color-gold-champagne);
  line-height: 1.2;
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}

.metric-label {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2rem;
  }
  .hero-subtitle {
    font-size: 1.02rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .metric-item:not(:last-child)::after {
    display: none;
  }
}

/* ================= 模块公用标题 ================= */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: rgba(14, 16, 23, 0.6);
  border-top: 1px solid var(--color-border-hairline);
  border-bottom: 1px solid var(--color-border-hairline);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.15rem;
  font-weight: 700;
  color: var(--color-ivory);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold-champagne), transparent);
  margin: 12px auto 0;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.68;
}

/* ================= 珠宝展匣卡 (Jewelry Display Frames: Features) ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 34px 30px;
  position: relative;
  box-shadow: var(--shadow-velvet);
  transition: var(--transition-haute);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 10% 10%, rgba(212, 175, 55, 0.08), transparent 60%);
  pointer-events: none;
}

.feature-card:hover {
  border-color: var(--color-gold-champagne);
  box-shadow: var(--shadow-jewel-hover);
  transform: translateY(-4px);
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(14, 16, 23, 0.9);
  color: var(--color-gold-champagne);
  border: 1px solid var(--color-gold-border);
  border-radius: 4px;
  margin-bottom: 20px;
  box-shadow: 0 0 14px rgba(212, 175, 55, 0.2);
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-ivory);
  margin-bottom: 12px;
}

.feature-text {
  font-size: 0.96rem;
  color: var(--color-platinum);
  line-height: 1.72;
}

/* ================= 传世场景 (Scenarios Cards) ================= */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

@media (max-width: 768px) {
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
}

.scenario-card {
  background: linear-gradient(145deg, var(--color-obsidian-card), var(--color-obsidian-light));
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 30px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-velvet);
  transition: var(--transition-haute);
}

.scenario-card:hover {
  border-color: var(--color-gold-champagne);
  transform: translateY(-3px);
  box-shadow: var(--shadow-jewel-hover);
}

.scenario-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border-hairline);
}

.scenario-title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-ivory);
}

.scenario-device {
  font-family: var(--font-serif);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--color-gold-light);
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--color-gold-border);
  padding: 3px 12px;
  border-radius: 4px;
}

.scenario-desc {
  font-size: 0.96rem;
  color: var(--color-platinum);
  line-height: 1.72;
}

/* ================= 工艺典范 (Benefits Grid) ================= */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.benefit-card {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 32px 26px;
  box-shadow: var(--shadow-velvet);
  transition: var(--transition-haute);
}

.benefit-card:hover {
  border-color: var(--color-gold-champagne);
  box-shadow: var(--shadow-jewel-hover);
}

.benefit-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-gold-champagne);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.benefit-card p {
  font-size: 0.95rem;
  color: var(--color-platinum);
  line-height: 1.72;
}

/* ================= 珍藏宝库 (Streaming & AI Capability Box) ================= */
.capability-box {
  background: radial-gradient(circle at 50% 50%, var(--color-obsidian-light), var(--color-obsidian-card));
  border: 1px solid var(--color-gold-border);
  border-radius: var(--radius-frame);
  padding: 44px 38px;
  box-shadow: var(--shadow-velvet), inset 0 0 40px rgba(0, 0, 0, 0.6);
}

.capability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

@media (max-width: 768px) {
  .capability-box {
    padding: 26px 20px;
  }
  .capability-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

.capability-col h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-ivory);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.05em;
}

.capability-col h3 svg {
  color: var(--color-gold-champagne);
}

.capability-col p {
  font-size: 0.96rem;
  color: var(--color-platinum);
  margin-bottom: 20px;
  line-height: 1.68;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  background: rgba(14, 16, 23, 0.8);
  color: var(--color-gold-light);
  border-radius: 4px;
  border: 1px solid var(--color-gold-border);
}

/* ================= 珠宝盒典藏定价 (Pricing: Haute Jewelry Frames) ================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }
}

.pricing-card {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-velvet);
  transition: var(--transition-haute);
}

.pricing-card:hover {
  border-color: var(--color-gold-champagne);
  box-shadow: var(--shadow-jewel-hover);
  transform: translateY(-5px);
}

/* 推荐档位: SIGNATURE PIECE */
.pricing-card.is-popular {
  background: linear-gradient(160deg, #171c2b, #11141e);
  border: 1px solid var(--color-gold-champagne);
  box-shadow: 0 16px 44px -6px rgba(0, 0, 0, 0.9), 0 0 24px rgba(212, 175, 55, 0.35);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #b89047, #d4af37, #b89047);
  color: #0b0c10;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: 20px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
}

.tier-name {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ivory);
  margin-bottom: 8px;
}

.tier-target {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  min-height: 22px;
}

.tier-price-box {
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-border-hairline);
}

.price-currency {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-gold-champagne);
}

.price-number {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--color-ivory);
  line-height: 1;
}

.price-period {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.tier-features {
  list-style: none;
  margin-bottom: 34px;
  flex-grow: 1;
}

.tier-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.94rem;
  color: var(--color-platinum);
  margin-bottom: 14px;
}

.tier-features svg {
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--color-gold-champagne);
}

.pricing-card .btn {
  width: 100%;
}

/* ================= 答疑殿堂 (FAQ: Haute Accordion) ================= */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  overflow: hidden;
  box-shadow: var(--shadow-velvet);
  transition: var(--transition-haute);
}

.faq-item:hover {
  border-color: var(--color-gold-border-bright);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-family: var(--font-serif);
  font-size: 1.08rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--color-ivory);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-question svg {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--color-gold-champagne);
}

.faq-item.is-open .faq-question svg {
  transform: rotate(180deg);
  color: var(--color-gold-light);
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.96rem;
  color: var(--color-platinum);
  line-height: 1.72;
  border-top: 1px solid var(--color-border-hairline);
  padding-top: 16px;
}

.faq-item.is-open .faq-answer {
  display: block;
}

/* ================= 终章密藏 (Final CTA: The Jewel Chamber) ================= */
.cta-section {
  padding: 96px 0;
  background: radial-gradient(circle at 50% 50%, #150912 0%, var(--color-obsidian-deep) 85%);
  border-top: 1px solid var(--color-border-hairline);
  border-bottom: 1px solid var(--color-border-hairline);
  text-align: center;
  position: relative;
}

.cta-box {
  max-width: 760px;
  margin: 0 auto;
}

.cta-title {
  font-family: var(--font-serif);
  font-size: 2.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ivory);
  margin-bottom: 18px;
  text-shadow: 0 0 20px rgba(212, 175, 55, 0.25);
}

.cta-desc {
  font-size: 1.12rem;
  color: var(--color-platinum);
  margin-bottom: 34px;
  line-height: 1.7;
}

/* ================= 皇家页脚 (Footer) ================= */
.site-footer {
  background: #090a0e;
  border-top: 1px solid var(--color-border-hairline);
  padding: 56px 0 36px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

@media (max-width: 800px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.footer-brand h4 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-ivory);
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 360px;
}

.footer-col h5 {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-gold-champagne);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.footer-col a:hover {
  color: var(--color-gold-light);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--color-border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

/* ================= 移动端吸底 CTA ================= */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(14, 16, 23, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-gold-border);
  padding: 12px 18px;
  z-index: 99;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.7);
  transition: transform 0.28s ease, opacity 0.28s ease;
}

@media (max-width: 768px) {
  .mobile-sticky-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
  }
  .mobile-sticky-bar.is-visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .mobile-bar-info {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-ivory);
    line-height: 1.3;
  }
  .mobile-bar-info span {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: normal;
    color: var(--color-gold-champagne);
  }
  .mobile-sticky-bar .btn {
    flex-shrink: 0;
    padding: 9px 18px;
    font-size: 0.9rem;
  }
}

/* ================= 面包屑导航 ================= */
.breadcrumb-nav {
  padding: 22px 0;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

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

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

.breadcrumb-separator {
  color: var(--color-gold-deep);
}

/* ================= 文章与合规页面排版 ================= */
.page-header {
  padding: 28px 0 32px;
  border-bottom: 1px solid var(--color-border-hairline);
  margin-bottom: 36px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--color-ivory);
  letter-spacing: 0.05em;
  line-height: 1.3;
  margin-bottom: 14px;
}

.page-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.82;
  color: var(--color-platinum);
}

.article-content p {
  margin-bottom: 24px;
}

.article-lead {
  font-size: 1.14rem;
  line-height: 1.8;
  color: var(--color-ivory);
  background: rgba(19, 22, 32, 0.85);
  border: 1px solid var(--color-gold-border);
  border-left: 4px solid var(--color-gold-champagne);
  padding: 20px 24px;
  border-radius: var(--radius-frame);
  margin-bottom: 32px;
  box-shadow: var(--shadow-velvet);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--color-ivory);
  letter-spacing: 0.05em;
  margin: 44px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-hairline);
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-gold-champagne);
  margin: 30px 0 16px;
}

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

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

.article-content strong {
  color: var(--color-ivory);
}

/* 提示框 (Callouts) */
.callout {
  padding: 20px 24px;
  border-radius: var(--radius-frame);
  margin-bottom: 26px;
  font-size: 0.96rem;
  line-height: 1.7;
}

.callout-info {
  background: rgba(15, 82, 186, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.38);
  color: #bfdbfe;
}

.callout-warning {
  background: rgba(153, 121, 61, 0.15);
  border: 1px solid var(--color-gold-border);
  color: var(--color-gold-light);
}

/* 数据表格 */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 32px;
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  box-shadow: var(--shadow-velvet);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  text-align: left;
  background: var(--color-obsidian-card);
}

.data-table th, .data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border-hairline);
}

.data-table th {
  font-family: var(--font-serif);
  background: rgba(14, 16, 23, 0.95);
  font-weight: 600;
  color: var(--color-gold-champagne);
  letter-spacing: 0.05em;
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* 文末 CTA 展匣 */
.article-cta-box {
  background: linear-gradient(145deg, var(--color-obsidian-card), #1b101d);
  border: 1px solid var(--color-gold-champagne);
  border-radius: var(--radius-frame);
  padding: 36px 30px;
  margin: 44px 0;
  text-align: center;
  box-shadow: var(--shadow-velvet), 0 0 24px rgba(212, 175, 55, 0.18);
}

.article-cta-box h3 {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-ivory);
  margin-bottom: 12px;
}

.article-cta-box p {
  font-size: 0.98rem;
  color: var(--color-platinum);
  margin-bottom: 24px;
}

/* 相关阅读 */
.related-posts {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 26px 28px;
  margin: 40px 0;
  box-shadow: var(--shadow-velvet);
}

.related-posts h4 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-gold-champagne);
  margin-bottom: 16px;
}

.related-posts ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-posts a {
  font-size: 0.96rem;
  color: var(--color-platinum);
}

.related-posts a:hover {
  color: var(--color-gold-light);
}

/* 指南卡片网格 (jiaocheng.html) */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin: 36px 0 52px;
}

@media (max-width: 768px) {
  .guides-grid {
    grid-template-columns: 1fr;
  }
}

.guide-card {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-velvet);
  transition: var(--transition-haute);
}

.guide-card:hover {
  border-color: var(--color-gold-champagne);
  box-shadow: var(--shadow-jewel-hover);
  transform: translateY(-4px);
}

.guide-category {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--color-gold-light);
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--color-gold-border);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
  align-self: flex-start;
}

.guide-card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ivory);
  margin-bottom: 12px;
  line-height: 1.45;
}

.guide-card-title a {
  color: var(--color-ivory);
}

.guide-card-title a:hover {
  color: var(--color-gold-light);
  text-decoration: none;
}

.guide-card-desc {
  font-size: 0.94rem;
  color: var(--color-platinum);
  line-height: 1.68;
  margin-bottom: 18px;
  flex-grow: 1;
}

.guide-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border-hairline);
  padding-top: 14px;
}

/* 法律合规盒 (Legal Box) */
.legal-box {
  background: var(--color-obsidian-card);
  border: 1px solid var(--color-border-card);
  border-radius: var(--radius-frame);
  padding: 40px;
  margin-bottom: 52px;
  box-shadow: var(--shadow-velvet);
}

@media (max-width: 640px) {
  .legal-box {
    padding: 24px;
  }
}

.legal-box h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-gold-champagne);
  letter-spacing: 0.05em;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-hairline);
}

.legal-box h2:first-of-type {
  margin-top: 0;
}

.legal-box p {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--color-platinum);
  margin-bottom: 20px;
}

.legal-box ul {
  margin: 0 0 20px 24px;
}

.legal-box li {
  font-size: 0.96rem;
  color: var(--color-platinum);
  margin-bottom: 10px;
  line-height: 1.7;
}