/* ==========================================================================
   DEEPSEEK 深度求索 — 哥特彩色玻璃风格 (GOTHIC STAINED GLASS & VAULTED RIBS)
   设计隐喻：石肋、深色室内、光从彩色窗进来。官网几乎全暗，信息是窗上的分格，
             DeepSeek 写在玫瑰窗中心。
   ========================================================================== */

:root {
  /* 深色室内与大教堂玄武岩石肋 */
  --cathedral-pitch: #060608;
  --cathedral-vault: #0B0B10;
  --cathedral-stone: #12131C;
  --cathedral-stone-light: #1A1C28;
  --stone-rib: #252838;
  --lead-came: #15161F;
  --lead-shadow: rgba(0, 0, 0, 0.85);

  /* 彩色玻璃晶莹透光色系 (Cobalt, Ruby, Amethyst, Amber, Emerald) */
  --glass-cobalt: #2563EB;
  --glass-cobalt-glow: rgba(37, 99, 235, 0.35);
  --glass-ruby: #DC2626;
  --glass-ruby-glow: rgba(220, 38, 38, 0.35);
  --glass-amethyst: #9333EA;
  --glass-amethyst-glow: rgba(147, 51, 234, 0.35);
  --glass-amber: #D97706;
  --glass-amber-glow: rgba(217, 119, 6, 0.35);
  --glass-emerald: #059669;
  --glass-emerald-glow: rgba(5, 150, 105, 0.35);

  /* 光辉金色与玫瑰窗焦点光束 */
  --rose-gold-core: #FDE68A;
  --rose-light-pure: #FFFFFF;
  --rose-halo: rgba(253, 230, 138, 0.45);

  /* 文字分层 */
  --text-radiant: #F8FAFC;
  --text-illuminated: #E2E8F0;
  --text-muted: #94A3B8;
  --text-shadowed: #64748B;

  /* 字体家族 */
  --font-gothic: 'Cinzel Decorative', 'Cinzel', 'Playfair Display', 'Songti SC', 'STSong', 'Georgia', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* 投影与透光 */
  --shadow-window-glow: 0 0 50px rgba(37, 99, 235, 0.15), 0 0 80px rgba(147, 51, 234, 0.12);
  --shadow-pane-inset: inset 0 0 20px rgba(0, 0, 0, 0.7);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--cathedral-pitch);
  color: var(--text-illuminated);
}

body {
  font-family: var(--font-sans);
  line-height: 1.7;
  background-color: var(--cathedral-pitch);
  /* 哥特大教堂深色室内与石肋拱券竖直背景 */
  background-image: 
    linear-gradient(90deg, rgba(37, 40, 56, 0.25) 1px, transparent 1px),
    linear-gradient(rgba(37, 40, 56, 0.1) 1px, transparent 1px),
    radial-gradient(circle at 50% 15%, rgba(147, 51, 234, 0.12) 0%, rgba(37, 99, 235, 0.08) 40%, transparent 75%);
  background-size: 60px 100%, 100% 60px, 100% 100%;
  background-attachment: fixed;
  color: var(--text-illuminated);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 顶部细尖拱石肋装饰线 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #DC2626 0%, #D97706 25%, #FDE68A 50%, #2563EB 75%, #9333EA 100%);
  z-index: 1000;
  box-shadow: 0 0 12px rgba(253, 230, 138, 0.6);
}

/* ==========================================================================
   1. 紧凑导航栏（吸顶、矮导航 ~50px、暗石横梁镶嵌彩色光琉璃）
   ========================================================================== */
.gothic-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(11, 11, 16, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--stone-rib);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.9);
}

.nav-container {
  max-width: 1240px;
  height: 52px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 2px;
  border: 1px solid var(--stone-rib);
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.4);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-gothic);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-radiant);
  line-height: 1.1;
  text-shadow: 0 0 10px rgba(253, 230, 138, 0.4);
}

.brand-sub {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--rose-gold-core);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-illuminated);
  letter-spacing: 0.06em;
  transition: all 0.2s ease;
  position: relative;
  padding: 4px 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--rose-gold-core);
  text-shadow: 0 0 8px rgba(253, 230, 138, 0.6);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #DC2626, #2563EB);
  transition: width 0.25s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-gothic-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 1.15rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--text-radiant);
  background: rgba(26, 28, 40, 0.8);
  border: 1px solid var(--stone-rib);
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.5);
  transition: all 0.2s ease;
}

.btn-gothic-nav:hover {
  border-color: var(--glass-cobalt);
  color: #FFFFFF;
  box-shadow: 0 0 12px var(--glass-cobalt-glow);
  transform: translateY(-1px);
}

.btn-stained-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 1.25rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: #060608;
  background: linear-gradient(135deg, #FDE68A 0%, #D97706 60%, #B45309 100%);
  border: 1px solid #FDE68A;
  box-shadow: 0 0 14px rgba(217, 119, 6, 0.5);
  transition: all 0.2s ease;
}

.btn-stained-gold:hover {
  background: linear-gradient(135deg, #FFFFFF 0%, #FBBF24 60%, #D97706 100%);
  box-shadow: 0 0 22px rgba(253, 230, 138, 0.8);
  transform: translateY(-1px);
}

/* ==========================================================================
   全局哥特石拱容器与石肋骨架
   ========================================================================== */
.cathedral-hall {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
}

/* 两侧尖拱柱石肋隐喻 */
.cathedral-ribs-frame {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1.5rem;
  right: 1.5rem;
  pointer-events: none;
  border-left: 1px solid rgba(37, 40, 56, 0.4);
  border-right: 1px solid rgba(37, 40, 56, 0.4);
  z-index: 1;
}

/* ==========================================================================
   2. Hero 价值宣称：玫瑰窗中心写 DeepSeek，光从彩色窗进来
   ========================================================================== */
.rose-window-hero {
  text-align: center;
  padding: 4.5rem 1rem 4rem 1rem;
  position: relative;
  z-index: 2;
}

/* 玫瑰窗外廓环与彩色玻璃分格辐射 */
.rose-window-medallion {
  width: 320px;
  height: 320px;
  margin: 0 auto 2.5rem auto;
  border-radius: 50%;
  position: relative;
  background: 
    radial-gradient(circle at center, rgba(253, 230, 138, 0.15) 0%, rgba(147, 51, 234, 0.2) 35%, rgba(37, 99, 235, 0.25) 60%, rgba(6, 6, 8, 0.95) 90%),
    conic-gradient(
      from 0deg,
      #B91C1C 0deg 30deg,
      #15161F 30deg 32deg,
      #2563EB 32deg 60deg,
      #15161F 60deg 62deg,
      #7E22CE 62deg 90deg,
      #15161F 90deg 92deg,
      #D97706 92deg 120deg,
      #15161F 120deg 122deg,
      #047857 122deg 150deg,
      #15161F 150deg 152deg,
      #DC2626 152deg 180deg,
      #15161F 180deg 182deg,
      #2563EB 182deg 210deg,
      #15161F 210deg 212deg,
      #9333EA 212deg 240deg,
      #15161F 240deg 242deg,
      #D97706 242deg 270deg,
      #15161F 270deg 272deg,
      #059669 272deg 300deg,
      #15161F 300deg 302deg,
      #B91C1C 302deg 330deg,
      #15161F 330deg 332deg,
      #2563EB 332deg 360deg
    );
  border: 6px solid var(--stone-rib);
  box-shadow: 
    0 0 60px rgba(37, 99, 235, 0.35),
    0 0 100px rgba(147, 51, 234, 0.25),
    inset 0 0 30px rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 玫瑰窗双环石肋花格 */
.rose-window-medallion::before {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 3px solid var(--lead-came);
  box-shadow: inset 0 0 15px rgba(253, 230, 138, 0.2);
}

.rose-window-medallion::after {
  content: "";
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 2px dashed rgba(253, 230, 138, 0.4);
}

/* 玫瑰窗核心：DeepSeek 写在玫瑰窗中心 */
.rose-center-core {
  position: relative;
  z-index: 10;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, #1A1C28 0%, #060608 90%);
  border: 3px solid var(--rose-gold-core);
  box-shadow: 
    0 0 25px rgba(253, 230, 138, 0.8),
    inset 0 0 15px rgba(253, 230, 138, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.rose-title-text {
  font-family: var(--font-gothic);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: #FFFFFF;
  text-shadow: 
    0 0 10px #FDE68A,
    0 0 20px #D97706;
}

/* 状态标签 */
.gothic-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 1.3rem;
  background: rgba(18, 19, 28, 0.85);
  border: 1px solid var(--stone-rib);
  border-top: 2px solid var(--glass-amber);
  margin-bottom: 1.5rem;
  box-shadow: 0 0 15px rgba(217, 119, 6, 0.2);
}

.status-candle {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #FDE68A;
  box-shadow: 0 0 8px #FDE68A;
}

.status-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rose-gold-core);
}

/* 唯一样式 h1 标题 */
.hero-lancet-headline {
  font-family: var(--font-gothic);
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.25;
  color: var(--text-radiant);
  margin-bottom: 1.2rem;
  text-shadow: 
    0 0 20px rgba(37, 99, 235, 0.4),
    0 0 40px rgba(147, 51, 234, 0.3);
}

.hero-lancet-headline .glass-word-blue {
  color: #60A5FA;
  text-shadow: 0 0 15px rgba(96, 165, 250, 0.6);
}

.hero-lancet-headline .glass-word-gold {
  color: #FDE68A;
  text-shadow: 0 0 15px rgba(253, 230, 138, 0.7);
}

/* 副标题：两三行说明问题、架构与解决之道 */
.hero-lancet-sub {
  max-width: 820px;
  margin: 0 auto 2.5rem auto;
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--text-illuminated);
}

/* 按钮组 */
.hero-lancet-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn-stained-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2.4rem;
  font-family: var(--font-gothic);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: #060608;
  background: linear-gradient(135deg, #FDE68A 0%, #D97706 50%, #B45309 100%);
  border: 1px solid #FDE68A;
  box-shadow: 
    0 0 25px rgba(217, 119, 6, 0.5),
    0 4px 12px rgba(0, 0, 0, 0.8);
  transition: all 0.25s ease;
}

.btn-stained-primary:hover {
  background: linear-gradient(135deg, #FFFFFF 0%, #FBBF24 50%, #D97706 100%);
  box-shadow: 0 0 35px rgba(253, 230, 138, 0.8);
  transform: translateY(-2px);
}

.btn-stained-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2.2rem;
  font-family: var(--font-gothic);
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--text-radiant);
  background: rgba(18, 19, 28, 0.85);
  border: 1px solid var(--stone-rib);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.8);
  transition: all 0.25s ease;
}

.btn-stained-secondary:hover {
  border-color: var(--glass-cobalt);
  color: #FFFFFF;
  box-shadow: 0 0 16px var(--glass-cobalt-glow);
  transform: translateY(-2px);
}

/* 尖拱花格统计行 */
.tracery-stat-panel {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--stone-rib);
  border-bottom: 1px solid var(--stone-rib);
  background: rgba(11, 11, 16, 0.6);
  flex-wrap: wrap;
}

.stat-facet {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num-glow {
  font-family: var(--font-gothic);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--rose-gold-core);
  text-shadow: 0 0 12px rgba(253, 230, 138, 0.4);
}

.stat-title-rib {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ==========================================================================
   3. 产品核心 UI 舞台（尖拱彩色玻璃窗格嵌真实交互界面，配 1.webp）
   ========================================================================== */
.stage-section-gothic {
  margin-bottom: 5.5rem;
  position: relative;
  z-index: 2;
}

.lancet-window-frame {
  background: var(--cathedral-stone);
  border: 2px solid var(--stone-rib);
  border-radius: 8px 8px 0 0;
  box-shadow: 
    0 0 50px rgba(37, 99, 235, 0.15),
    0 0 80px rgba(147, 51, 234, 0.12),
    0 16px 40px rgba(0, 0, 0, 0.9);
  overflow: hidden;
  position: relative;
}

/* 窗顶尖拱石肋横梁 */
.lancet-arch-mullion {
  background: var(--cathedral-vault);
  border-bottom: 2px solid var(--stone-rib);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mullion-left {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-gothic);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--rose-gold-core);
  letter-spacing: 0.08em;
}

.mullion-gem {
  width: 8px;
  height: 8px;
  background: #2563EB;
  border: 1px solid #60A5FA;
  transform: rotate(45deg);
  box-shadow: 0 0 8px #2563EB;
}

.mullion-badges {
  display: flex;
  gap: 0.6rem;
}

.mullion-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.15rem 0.6rem;
  background: rgba(6, 6, 8, 0.7);
  border: 1px solid var(--stone-rib);
  color: var(--text-muted);
}

.lancet-content-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 2rem;
  padding: 2.2rem;
  align-items: center;
}

.pane-visual-container {
  background: #000000;
  border: 2px solid var(--lead-came);
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.9), 0 0 20px rgba(37, 99, 235, 0.2);
  overflow: hidden;
  position: relative;
}

.pane-visual-container img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.pane-visual-container:hover img {
  transform: scale(1.02);
}

.lancet-description-pane {
  display: flex;
  flex-direction: column;
}

.pane-kicker {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #60A5FA;
  margin-bottom: 0.4rem;
}

.pane-heading {
  font-family: var(--font-gothic);
  font-size: 1.7rem;
  color: var(--text-radiant);
  line-height: 1.35;
  margin-bottom: 1rem;
}

.pane-paragraph {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-illuminated);
  margin-bottom: 1.5rem;
}

.pane-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.8rem;
}

.pane-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  font-size: 0.9rem;
  color: var(--text-illuminated);
}

.pane-bullet {
  color: var(--rose-gold-core);
  font-weight: bold;
}

/* ==========================================================================
   4. 核心特性矩阵（彩色玻璃分格卡片、石肋铅条边框，配 3.webp, 5.webp, 2.webp）
   ========================================================================== */
.matrix-section-gothic {
  margin-bottom: 5.5rem;
  position: relative;
  z-index: 2;
}

.section-head-stained {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-stained-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #FDE68A;
  margin-bottom: 0.5rem;
  display: block;
  text-shadow: 0 0 10px rgba(253, 230, 138, 0.4);
}

.section-stained-title {
  font-family: var(--font-gothic);
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--text-radiant);
  margin-bottom: 0.8rem;
}

.section-stained-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.matrix-stained-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

/* 窗格分格卡片 */
.stained-glass-card {
  background: var(--cathedral-stone);
  border: 2px solid var(--stone-rib);
  padding: 2.2rem;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.25s ease;
}

.stained-glass-card.card-cobalt {
  border-top: 3px solid var(--glass-cobalt);
}
.stained-glass-card.card-cobalt:hover {
  box-shadow: 0 0 35px var(--glass-cobalt-glow);
  transform: translateY(-3px);
}

.stained-glass-card.card-ruby {
  border-top: 3px solid var(--glass-ruby);
}
.stained-glass-card.card-ruby:hover {
  box-shadow: 0 0 35px var(--glass-ruby-glow);
  transform: translateY(-3px);
}

.stained-glass-card.card-amethyst {
  border-left: 3px solid var(--glass-amethyst);
}
.stained-glass-card.card-amethyst:hover {
  box-shadow: 0 0 35px var(--glass-amethyst-glow);
  transform: translateY(-3px);
}

.card-top-traceries {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.card-traceries-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 0.2rem 0.65rem;
  background: rgba(6, 6, 8, 0.6);
  border: 1px solid var(--stone-rib);
}
.card-cobalt .card-traceries-pill { color: #60A5FA; border-color: rgba(37, 99, 235, 0.4); }
.card-ruby .card-traceries-pill { color: #F87171; border-color: rgba(220, 38, 38, 0.4); }
.card-amethyst .card-traceries-pill { color: #C084FC; border-color: rgba(147, 51, 234, 0.4); }

.card-traceries-no {
  font-family: var(--font-gothic);
  font-size: 0.85rem;
  color: var(--text-shadowed);
}

.card-traceries-title {
  font-family: var(--font-gothic);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-radiant);
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.card-traceries-text {
  font-size: 0.93rem;
  color: var(--text-illuminated);
  line-height: 1.75;
  margin-bottom: 1.4rem;
}

.card-window-pane-media {
  background: #000000;
  border: 1px solid var(--stone-rib);
  margin-bottom: 1.2rem;
  overflow: hidden;
}

.card-window-pane-media img {
  width: 100%;
  height: auto;
  display: block;
}

/* 哥特彩色玻璃代码窗格 */
.gothic-code-pane {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: #060608;
  color: #EDE8F5;
  padding: 1.1rem;
  border-left: 2px solid var(--glass-amber);
  line-height: 1.6;
  overflow-x: auto;
}

.gothic-code-pane .gold { color: #FDE68A; }
.gothic-code-pane .blue { color: #93C5FD; }
.gothic-code-pane .purple { color: #D8B4FE; }
.gothic-code-pane .red { color: #FCA5A5; }
.gothic-code-pane .green { color: #86EFAC; }
.gothic-code-pane .dim { color: #64748B; }

/* 通栏分格卡片 */
.stained-full-slab {
  background: var(--cathedral-stone);
  border: 2px solid var(--stone-rib);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

/* ==========================================================================
   5. 零摩擦起步（石拱基座单条命令、免注即跑）
   ========================================================================== */
.quickstart-section-gothic {
  margin-bottom: 5.5rem;
  position: relative;
  z-index: 2;
}

.altar-plinth-box {
  max-width: 880px;
  margin: 0 auto;
  background: var(--cathedral-stone);
  border: 2px solid var(--stone-rib);
  border-top: 3px solid var(--glass-amber);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.9);
  padding: 3rem 2.5rem;
  text-align: center;
}

.plinth-stained-title {
  font-family: var(--font-gothic);
  font-size: 1.85rem;
  color: var(--text-radiant);
  margin-bottom: 0.6rem;
}

.plinth-stained-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
}

.plinth-cli-came {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #060608;
  border: 1px solid var(--stone-rib);
  border-left: 3px solid var(--rose-gold-core);
  padding: 0.85rem 1.4rem;
  max-width: 660px;
  margin: 0 auto 1.5rem auto;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.8);
}

.cli-came-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #FDE68A;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.cli-prompt-symbol {
  color: #60A5FA;
  font-weight: bold;
}

.btn-cli-relic {
  background: rgba(217, 119, 6, 0.2);
  color: var(--rose-gold-core);
  border: 1px solid rgba(253, 230, 138, 0.3);
  padding: 0.35rem 0.9rem;
  font-size: 0.78rem;
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-cli-relic:hover {
  background: var(--glass-amber);
  color: #060608;
  box-shadow: 0 0 10px rgba(253, 230, 138, 0.5);
}

.plinth-foot-perks {
  display: flex;
  justify-content: center;
  gap: 2rem;
  font-size: 0.84rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

/* ==========================================================================
   6. 生态号召区（尖拱窗格四大生态立柱）
   ========================================================================== */
.community-section-gothic {
  margin-bottom: 5.5rem;
  position: relative;
  z-index: 2;
}

.community-traceries-quad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.traceries-pillar-item {
  background: var(--cathedral-stone);
  border: 1px solid var(--stone-rib);
  border-top: 3px solid var(--glass-cobalt);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.7);
  text-decoration: none;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.traceries-pillar-item:hover {
  border-color: var(--rose-gold-core);
  transform: translateY(-3px);
  box-shadow: 0 0 25px rgba(253, 230, 138, 0.2);
}

.pillar-facet-glyph {
  font-size: 1.8rem;
  color: var(--rose-gold-core);
  margin-bottom: 0.9rem;
  text-shadow: 0 0 10px rgba(253, 230, 138, 0.5);
}

.pillar-facet-name {
  font-family: var(--font-gothic);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-radiant);
  margin-bottom: 0.4rem;
}

.pillar-facet-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   7. 极简页脚（低对比度石刻文字、无外部链接）
   ========================================================================== */
.gothic-footer {
  border-top: 1px solid var(--stone-rib);
  background: #040406;
  padding: 3rem 0;
  position: relative;
  z-index: 10;
}

.footer-inner-traceries {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-whisper {
  font-size: 0.84rem;
  color: var(--text-shadowed);
  letter-spacing: 0.04em;
}

.footer-nav-ribs {
  display: flex;
  gap: 1.8rem;
  list-style: none;
}

.footer-nav-ribs a {
  text-decoration: none;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  transition: color 0.2s ease;
}

.footer-nav-ribs a:hover {
  color: var(--rose-gold-core);
  text-shadow: 0 0 8px rgba(253, 230, 138, 0.4);
}

/* ==========================================================================
   页面专属扩展样式：web.html (对话工作台) & help.html (API 窗格清单)
   ========================================================================== */

/* web.html 工作台 */
.workbench-gothic-panel {
  background: var(--cathedral-stone);
  border: 2px solid var(--stone-rib);
  border-top: 3px solid var(--glass-cobalt);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.85);
  margin-bottom: 4.5rem;
}

.workbench-gothic-mullion {
  padding: 0.85rem 1.5rem;
  background: var(--cathedral-vault);
  border-bottom: 1px solid var(--stone-rib);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.workbench-dialogue-vault {
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.dialogue-stained-pane {
  display: flex;
  gap: 1.25rem;
}

.dialogue-gem-avatar {
  width: 38px;
  height: 38px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-gothic);
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.dialogue-gem-avatar.user {
  background: #1A1C28;
  color: var(--rose-gold-core);
  border: 1px solid var(--stone-rib);
}

.dialogue-gem-avatar.ai {
  background: linear-gradient(135deg, #2563EB 0%, #7E22CE 100%);
  color: #FFFFFF;
  border: 1px solid #60A5FA;
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.5);
}

.dialogue-bubble-vault {
  flex: 1;
  background: #0B0B10;
  border: 1px solid var(--stone-rib);
  padding: 1.4rem 1.6rem;
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.6);
}

.cot-chamber {
  background: #060608;
  border-left: 2px solid var(--glass-amber);
  padding: 1rem 1.25rem;
  margin-bottom: 1.2rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.cot-chamber-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-gothic);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--rose-gold-core);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}

.workbench-input-tracery {
  background: var(--cathedral-vault);
  border-top: 1px solid var(--stone-rib);
  padding: 1.25rem 2rem;
  display: flex;
  gap: 1rem;
}

.workbench-stone-field {
  flex: 1;
  padding: 0.85rem 1.25rem;
  background: #060608;
  border: 1px solid var(--stone-rib);
  color: var(--text-radiant);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.workbench-stone-field:focus {
  border-color: var(--glass-cobalt);
  box-shadow: 0 0 10px var(--glass-cobalt-glow);
}

/* help.html 表格 */
.gothic-epigraph-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--cathedral-stone);
  border: 1px solid var(--stone-rib);
  margin-bottom: 3rem;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.7);
}

.gothic-epigraph-table th {
  background: var(--cathedral-vault);
  padding: 1rem 1.25rem;
  font-family: var(--font-gothic);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--rose-gold-core);
  border-bottom: 2px solid var(--stone-rib);
  text-align: left;
}

.gothic-epigraph-table td {
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(37, 40, 56, 0.4);
  color: var(--text-illuminated);
}

.gothic-epigraph-table tr:hover td {
  background: rgba(37, 99, 235, 0.05);
}

.http-gem-badge {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid var(--glass-cobalt);
  color: #60A5FA;
}

/* 响应式断点 */
@media (max-width: 992px) {
  .hero-lancet-headline { font-size: 2.4rem; }
  .lancet-content-grid,
  .matrix-stained-pair,
  .stained-full-slab {
    grid-template-columns: 1fr;
  }
  .community-traceries-quad {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links { display: none; }
}

@media (max-width: 600px) {
  .rose-window-medallion { width: 240px; height: 240px; }
  .rose-window-medallion::before { width: 170px; height: 170px; }
  .rose-center-core { width: 90px; height: 90px; }
  .rose-title-text { font-size: 0.92rem; }
  .hero-lancet-headline { font-size: 1.85rem; }
  .community-traceries-quad { grid-template-columns: 1fr; }
  .tracery-stat-panel { flex-direction: column; gap: 1rem; }
  .footer-inner-traceries { flex-direction: column; text-align: center; }
}