/* ==========================================================================
   DeepSeek - 舞台台口（Proscenium & Theater Curtain）专属样式
   严格色限：丝绒 #4A1824、聚光 #F6E6C8、边金 #E7C27A
   ========================================================================== */

:root {
  --velvet-base: #4A1824;      /* 丝绒深红主基调 */
  --velvet-shadow: #2E0E16;    /* 丝绒深褶皱阴影 */
  --velvet-highlight: #5F2130; /* 丝绒迎光面 */
  --spotlight: #F6E6C8;        /* 聚光暖白米黄 */
  --spotlight-glow: rgba(246, 230, 200, 0.25);
  --trim-gold: #E7C27A;        /* 边金金饰 */
  --trim-gold-dark: #C29F55;   /* 边金暗部 */
  --trim-gold-glow: rgba(231, 194, 122, 0.4);
  --sonar-green: rgba(0, 229, 160, 0.9); /* 首屏声呐绿 */
  
  --font-serif: "Playfair Display", "Songti SC", "Noto Serif SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, Menlo, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--velvet-base);
  color: var(--spotlight);
}

body {
  font-family: var(--font-sans);
  background-color: var(--velvet-base);
  color: var(--spotlight);
  line-height: 1.65;
  overflow-x: hidden;
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(95, 33, 48, 0.6) 0%, rgba(46, 14, 22, 0.95) 75%),
    linear-gradient(180deg, #4A1824 0%, #2E0E16 100%);
  background-attachment: fixed;
}

/* 链接无下划线，完全控制站内状态 */
a {
  color: inherit;
  text-decoration: none;
}

/* ==========================================================================
   1. 顶栏：左右分栏（左边只有 Logo，右边是「API 开放平台」和「English」）
   ========================================================================== */
.theater-topbar {
  width: 100%;
  height: 72px;
  padding: 0 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 50;
  background: rgba(46, 14, 22, 0.92);
  border-bottom: 2px solid var(--trim-gold);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
}

.topbar-left {
  display: flex;
  align-items: center;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-img {
  height: 40px;
  width: auto;
  display: block;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.6));
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 28px;
}

.topbar-link {
  color: var(--trim-gold);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 8px 18px;
  border: 1px solid var(--trim-gold);
  border-radius: 2px;
  background: rgba(231, 194, 122, 0.08);
  transition: all 0.25s ease;
  font-family: var(--font-sans);
}

.topbar-link:hover {
  background: var(--trim-gold);
  color: var(--velvet-base);
  box-shadow: 0 0 12px var(--trim-gold-glow);
}

.topbar-lang {
  color: var(--spotlight);
  font-size: 0.9rem;
  opacity: 0.8;
  letter-spacing: 0.05em;
  cursor: default;
  border-left: 1px solid rgba(231, 194, 122, 0.35);
  padding-left: 20px;
}

/* ==========================================================================
   2. 首屏：整页重心
   上层偏右绘制原生动态 Canvas 声呐（同心圆、十字线、扫描扇形和回波点，rgba(0,229,160)）
   文字叠在画布上：公告条、超大标题、副题、两张同结构卡片
   ========================================================================== */
.hero-proscenium-section {
  position: relative;
  min-height: 640px;
  padding: 70px 48px 90px;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 3px double var(--trim-gold);
}

.sonar-canvas-wrap {
  position: absolute;
  top: 15px;
  right: 5%;
  width: 580px;
  height: 580px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.85;
}

.sonar-canvas-el {
  width: 100%;
  height: 100%;
  display: block;
}

.hero-content-wrap {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

/* 公告条 */
.hero-notice-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(74, 24, 36, 0.85);
  border: 1px solid var(--trim-gold);
  border-radius: 2px;
  color: var(--trim-gold);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.notice-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--trim-gold);
  box-shadow: 0 0 8px var(--trim-gold);
}

/* 超大标题 (唯一 h1) */
.hero-big-title {
  font-family: var(--font-serif);
  font-size: 3.4rem;
  line-height: 1.15;
  font-weight: 800;
  color: var(--spotlight);
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8), 0 0 25px rgba(246, 230, 200, 0.2);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero-big-title .gold-accent {
  color: var(--trim-gold);
}

/* 副题 */
.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--spotlight);
  opacity: 0.9;
  max-width: 680px;
  margin-bottom: 36px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
}

/* 两张同结构卡片（一对等宽入口） */
.hero-dual-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 720px;
}

.hero-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border-radius: 2px;
  transition: all 0.3s ease;
  position: relative;
  border: 1.5px solid var(--trim-gold);
}

/* 主卡：链到 web.html */
.hero-card-primary {
  background: linear-gradient(145deg, rgba(95, 33, 48, 0.9), rgba(46, 14, 22, 0.95));
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6), inset 0 0 15px rgba(231, 194, 122, 0.15);
}

.hero-card-primary:hover {
  transform: translateY(-4px);
  border-color: var(--spotlight);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), 0 0 20px var(--trim-gold-glow);
}

/* 次卡：空链接 */
.hero-card-secondary {
  background: rgba(46, 14, 22, 0.6);
  border-color: rgba(231, 194, 122, 0.5);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.hero-card-secondary:hover {
  transform: translateY(-2px);
  border-color: var(--trim-gold);
  background: rgba(74, 24, 36, 0.7);
}

.card-icon {
  font-size: 1.6rem;
  color: var(--trim-gold);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--spotlight);
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.card-desc {
  font-size: 0.88rem;
  color: var(--spotlight);
  opacity: 0.8;
  line-height: 1.55;
  margin-bottom: 18px;
  flex-grow: 1;
}

.card-arrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--trim-gold);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   ★ 核心风格区：舞台台口 · 幕布只拉开一条缝 · 剧场缝里才有内容 · 节目单
   布局：舞台台口画框，幕布只拉开一条缝。
   骨架：台口，幕缝，节目单。
   提示词：DeepSeek网页版在幕缝里。缝中一行对话，占位「探索未至之境」。
   节目单列 DeepSeek AI、Harness、api开放平台。台口金边小字「网页版入口」。
   色限 #4A1824 #F6E6C8 #E7C27A
   ========================================================================== */
.theater-stage-section {
  padding: 80px 48px;
  position: relative;
  background: radial-gradient(circle at 50% 30%, #3a111b 0%, #20080e 100%);
  border-bottom: 2px solid var(--trim-gold);
}

.stage-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* 舞台台口大画框 (Proscenium Arch) */
.proscenium-arch-frame {
  position: relative;
  background: #270a11;
  border: 4px solid var(--trim-gold);
  box-shadow: 
    0 0 0 4px #1b060c,
    0 0 0 8px var(--trim-gold),
    0 25px 60px rgba(0, 0, 0, 0.9);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 48px;
}

/* 台口顶部横梁饰条与金边小字 */
.proscenium-header-frieze {
  background: linear-gradient(90deg, #380d17 0%, #5a1c2a 50%, #380d17 100%);
  border-bottom: 2px solid var(--trim-gold);
  padding: 12px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.arch-title-emboss {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--trim-gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 12px;
}

.arch-title-emboss::before,
.arch-title-emboss::after {
  content: "♦";
  color: var(--spotlight);
  font-size: 0.8rem;
}

/* 台口金边小字「网页版入口」 */
.proscenium-gold-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--trim-gold);
  letter-spacing: 0.15em;
  font-weight: 700;
  border: 1px solid var(--trim-gold);
  padding: 4px 12px;
  border-radius: 2px;
  background: rgba(231, 194, 122, 0.12);
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.proscenium-gold-label:hover {
  background: var(--trim-gold);
  color: var(--velvet-base);
  box-shadow: 0 0 10px var(--trim-gold-glow);
}

/* 幕布舞台视窗（Curtain Stage Interior） */
.curtain-stage-viewport {
  position: relative;
  min-height: 440px;
  background: #120306;
  display: flex;
  align-items: stretch;
  justify-content: center;
  overflow: hidden;
}

/* 左侧丝绒幕布：重褶、厚重、微弱阴影 */
.velvet-curtain-left {
  flex: 1;
  background: 
    repeating-linear-gradient(90deg, 
      #4A1824 0px, 
      #351019 35px, 
      #5C1E2D 70px, 
      #2E0E16 105px, 
      #4A1824 140px);
  box-shadow: inset -15px 0 30px rgba(0,0,0,0.95);
  position: relative;
  border-right: 2px solid rgba(231, 194, 122, 0.3);
}

/* 右侧丝绒幕布 */
.velvet-curtain-right {
  flex: 1;
  background: 
    repeating-linear-gradient(90deg, 
      #4A1824 0px, 
      #2E0E16 35px, 
      #5C1E2D 70px, 
      #351019 105px, 
      #4A1824 140px);
  box-shadow: inset 15px 0 30px rgba(0,0,0,0.95);
  position: relative;
  border-left: 2px solid rgba(231, 194, 122, 0.3);
}

/* 幕布只拉开一条缝：聚光投射缝隙 */
.curtain-slit-portal {
  width: 440px;
  flex-shrink: 0;
  position: relative;
  background: #0d0205;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 40px 28px;
  overflow: hidden;
  box-shadow: 
    0 0 60px rgba(246, 230, 200, 0.35),
    inset 0 0 80px rgba(246, 230, 200, 0.25);
  cursor: pointer;
  transition: all 0.4s ease;
  border-left: 2px solid var(--trim-gold);
  border-right: 2px solid var(--trim-gold);
}

.curtain-slit-portal:hover {
  width: 520px;
  box-shadow: 
    0 0 90px rgba(246, 230, 200, 0.55),
    inset 0 0 100px rgba(246, 230, 200, 0.35);
}

/* 聚光灯束自上而下照射在幕缝中 */
.slit-spotlight-beam {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 140%;
  height: 100%;
  background: radial-gradient(ellipse at 50% 0%, rgba(246, 230, 200, 0.45) 0%, rgba(246, 230, 200, 0.08) 60%, transparent 80%);
  pointer-events: none;
}

/* 缝里的核心内容：DeepSeek网页版在幕缝里。缝中一行对话，占位「探索未至之境」 */
.slit-inner-content {
  position: relative;
  z-index: 5;
  text-align: center;
  width: 100%;
}

.slit-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--trim-gold);
  margin-bottom: 14px;
  text-transform: uppercase;
  display: inline-block;
  background: rgba(46, 14, 22, 0.9);
  padding: 3px 10px;
  border: 1px solid var(--trim-gold);
}

.slit-dialogue-box {
  background: rgba(46, 14, 22, 0.92);
  border: 1.5px solid var(--trim-gold);
  padding: 18px 20px;
  border-radius: 3px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8), 0 0 15px rgba(231, 194, 122, 0.2);
  margin-bottom: 20px;
  text-align: left;
}

.slit-dialogue-prompt {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--trim-gold);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.slit-dialogue-text {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--spotlight);
  line-height: 1.4;
  letter-spacing: 0.05em;
  text-shadow: 0 0 10px rgba(246, 230, 200, 0.4);
}

.slit-cursor-blink {
  display: inline-block;
  width: 3px;
  height: 1.2em;
  background: var(--trim-gold);
  vertical-align: text-bottom;
  margin-left: 4px;
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.slit-enter-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--trim-gold);
  color: var(--velvet-base);
  font-size: 0.95rem;
  font-weight: 800;
  padding: 10px 24px;
  border-radius: 2px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.5);
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}

.slit-enter-cta:hover {
  background: var(--spotlight);
  box-shadow: 0 0 20px rgba(246, 230, 200, 0.6);
  transform: translateY(-2px);
}

/* 剧场节目单 (Playbill / Program) */
.playbill-container {
  background: linear-gradient(180deg, #3b121c 0%, #290a12 100%);
  border: 2px solid var(--trim-gold);
  border-radius: 3px;
  padding: 36px 40px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.7);
}

.playbill-header {
  text-align: center;
  border-bottom: 1px double var(--trim-gold);
  padding-bottom: 20px;
  margin-bottom: 30px;
}

.playbill-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--trim-gold);
  text-transform: uppercase;
}

.playbill-main-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--spotlight);
  font-weight: 800;
  margin: 6px 0;
  letter-spacing: 0.08em;
}

.playbill-sub {
  font-size: 0.95rem;
  color: var(--spotlight);
  opacity: 0.85;
}

/* 节目单三项：DeepSeek AI、Harness、api开放平台 */
.playbill-acts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.playbill-act-item {
  background: rgba(74, 24, 36, 0.65);
  border: 1.5px solid var(--trim-gold);
  padding: 24px;
  border-radius: 2px;
  position: relative;
  transition: all 0.3s ease;
}

.playbill-act-item:hover {
  background: rgba(95, 33, 48, 0.85);
  border-color: var(--spotlight);
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.6);
}

.act-number {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--trim-gold);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
  font-weight: 700;
}

.act-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--spotlight);
  margin-bottom: 12px;
  font-weight: 700;
}

.act-desc {
  font-size: 0.9rem;
  color: var(--spotlight);
  opacity: 0.85;
  line-height: 1.6;
  margin-bottom: 16px;
}

.act-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--trim-gold);
  font-size: 0.85rem;
  font-weight: 700;
}

/* ==========================================================================
   3. 能力区：首屏声呐从背景变成内容
   四张卡横排，每张仍是图标、标题、一段说明
   对应：深海扫描、探测未知、知识显影、Harness
   下面的指标条把四组数字等分排开，打断卡片墙，横向节奏
   ========================================================================== */
.capabilities-section {
  padding: 85px 48px;
  background: linear-gradient(180deg, #2E0E16 0%, #3e141f 100%);
  border-bottom: 2px solid var(--trim-gold);
}

.capabilities-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--trim-gold);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: inline-block;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--spotlight);
  letter-spacing: 0.04em;
}

.capabilities-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.cap-card {
  background: rgba(46, 14, 22, 0.85);
  border: 1.5px solid var(--trim-gold);
  padding: 28px 22px;
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.cap-card:hover {
  background: rgba(74, 24, 36, 0.95);
  border-color: var(--spotlight);
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.6), 0 0 15px var(--trim-gold-glow);
}

.cap-icon {
  font-size: 1.8rem;
  color: var(--trim-gold);
  margin-bottom: 14px;
}

.cap-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--spotlight);
  margin-bottom: 10px;
}

.cap-desc {
  font-size: 0.88rem;
  color: var(--spotlight);
  opacity: 0.8;
  line-height: 1.6;
}

/* 下方的指标条：四组数字等分排开，打断卡片墙 */
.metrics-break-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #1f070d;
  border: 2px solid var(--trim-gold);
  border-radius: 2px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
}

.metric-cell {
  padding: 24px 20px;
  text-align: center;
  border-right: 1px solid rgba(231, 194, 122, 0.3);
}

.metric-cell:last-child {
  border-right: none;
}

.metric-val {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--trim-gold);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--spotlight);
  opacity: 0.85;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   4. 步骤区：唯一写了内联布局的区块
   外层灰底拉通全宽，内层收成 1200px 居中
   四步竖向排列，左侧数字、右侧标题加说明，和四列网格形成横竖对比
   ========================================================================== */
/* 类选择器仅定义通用修饰，内联布局在 HTML 中严格体现 */
.step-item-row {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 24px;
  background: rgba(46, 14, 22, 0.75);
  border: 1.5px solid var(--trim-gold);
  border-radius: 2px;
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.step-item-row:last-child {
  margin-bottom: 0;
}

.step-item-row:hover {
  background: rgba(74, 24, 36, 0.9);
  border-color: var(--spotlight);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.step-num-col {
  width: 56px;
  height: 56px;
  background: var(--trim-gold);
  color: var(--velvet-base);
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.4);
}

.step-text-col {
  flex: 1;
}

.step-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--spotlight);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.92rem;
  color: var(--spotlight);
  opacity: 0.85;
  line-height: 1.6;
}

/* ==========================================================================
   5. API 区：退成单列代码块
   注释、关键字、字符串靠颜色区分，没有左右分栏，没有请求和响应对照
   ========================================================================== */
.api-single-section {
  padding: 85px 48px;
  background: #23080f;
  border-bottom: 2px solid var(--trim-gold);
}

.api-container {
  max-width: 1000px;
  margin: 0 auto;
}

.code-terminal-block {
  background: #150307;
  border: 2px solid var(--trim-gold);
  border-radius: 3px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.8);
  overflow: hidden;
}

.terminal-titlebar {
  background: #330b14;
  border-bottom: 1.5px solid var(--trim-gold);
  padding: 10px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--trim-gold);
  letter-spacing: 0.1em;
}

.terminal-body {
  padding: 28px;
  overflow-x: auto;
}

.terminal-code {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--spotlight);
}

/* 语法高亮色 */
.syn-comment { color: #8A6872; font-style: italic; }
.syn-keyword { color: var(--trim-gold); font-weight: bold; }
.syn-string { color: #80E3A7; }
.syn-function { color: #F6E6C8; font-weight: 600; }
.syn-param { color: #E7C27A; }

/* ==========================================================================
   6. 影像区：四张横图，只做展示，没有图注和点击
   其余 5.webp-9.webp 合理插入全站
   ========================================================================== */
.gallery-section {
  padding: 75px 48px;
  background: #2E0E16;
  border-bottom: 2px solid var(--trim-gold);
}

.gallery-container {
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.gallery-item {
  position: relative;
  border: 1.5px solid var(--trim-gold);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
  background: #1b060c;
  aspect-ratio: 16 / 10;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none; /* 纯展示，无点击 */
  filter: contrast(1.05) brightness(0.95);
  transition: transform 0.4s ease;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.03);
}

/* 补充展品区：插入 5.webp - 7.webp 等展示图 */
.stage-showcase-section {
  padding: 60px 48px;
  background: #20080e;
  border-bottom: 2px solid var(--trim-gold);
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: center;
}

.showcase-visual {
  border: 2px solid var(--trim-gold);
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.7);
}

.showcase-visual img {
  width: 100%;
  height: auto;
  display: block;
}

.showcase-text h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--trim-gold);
  margin-bottom: 14px;
}

.showcase-text p {
  font-size: 0.95rem;
  color: var(--spotlight);
  opacity: 0.88;
  line-height: 1.7;
  margin-bottom: 14px;
}

/* ==========================================================================
   7. 页脚：多列
   品牌说明占更宽一列，后面四列是研究、产品、法务、招聘
   最底下一整条版权和第三方声明
   ========================================================================== */
.theater-footer {
  background: #170408;
  border-top: 3px double var(--trim-gold);
  padding: 70px 48px 35px;
  color: var(--spotlight);
}

.footer-multi-columns {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-col {
  padding-right: 20px;
}

.footer-logo-img {
  height: 38px;
  width: auto;
  margin-bottom: 16px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.7));
}

.footer-brand-col p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--spotlight);
  opacity: 0.8;
  margin-bottom: 16px;
}

.footer-col h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--trim-gold);
  margin-bottom: 18px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(231, 194, 122, 0.3);
  padding-bottom: 6px;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--spotlight);
  opacity: 0.75;
  transition: all 0.2s ease;
}

.footer-col ul li a:hover {
  opacity: 1;
  color: var(--trim-gold);
  padding-left: 4px;
}

.footer-bottom-line {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(231, 194, 122, 0.25);
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--spotlight);
  opacity: 0.65;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
}

/* ==========================================================================
   子页面统一规范排版（web.html, help.html）
   ========================================================================== */
.subpage-hero {
  padding: 60px 48px;
  background: radial-gradient(circle at 50% 0%, #3e121d 0%, #1c050a 100%);
  border-bottom: 2px solid var(--trim-gold);
}

.subpage-container {
  max-width: 1200px;
  margin: 0 auto;
}

.subpage-hero-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--spotlight);
  font-weight: 800;
  margin-bottom: 14px;
}

.subpage-hero-sub {
  font-size: 1.05rem;
  color: var(--spotlight);
  opacity: 0.85;
  max-width: 760px;
  line-height: 1.7;
}

.subpage-content-section {
  padding: 60px 48px 80px;
}

.subpage-grid-2col {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 36px;
}

.subpage-card-panel {
  background: rgba(46, 14, 22, 0.85);
  border: 1.5px solid var(--trim-gold);
  border-radius: 3px;
  padding: 32px;
  margin-bottom: 30px;
  box-shadow: 0 6px 25px rgba(0,0,0,0.5);
}

.subpage-card-panel h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--trim-gold);
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(231, 194, 122, 0.3);
  padding-bottom: 8px;
}

.subpage-card-panel p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--spotlight);
  opacity: 0.9;
  margin-bottom: 14px;
}

.subpage-card-panel ul, 
.subpage-card-panel ol {
  margin-left: 20px;
  margin-bottom: 16px;
  color: var(--spotlight);
  opacity: 0.88;
  font-size: 0.93rem;
  line-height: 1.75;
}

.subpage-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: 2px;
  font-size: 0.9rem;
  font-weight: 700;
  transition: all 0.25s ease;
  letter-spacing: 0.05em;
  text-align: center;
}

.subpage-btn-gold {
  background: var(--trim-gold);
  color: var(--velvet-base);
  border: 1px solid var(--trim-gold);
}

.subpage-btn-gold:hover {
  background: var(--spotlight);
  box-shadow: 0 0 15px var(--trim-gold-glow);
}

.subpage-btn-outline {
  background: transparent;
  color: var(--trim-gold);
  border: 1px solid var(--trim-gold);
}

.subpage-btn-outline:hover {
  background: rgba(231, 194, 122, 0.15);
  color: var(--spotlight);
}

/* 响应式适配 */
@media (max-width: 992px) {
  .hero-proscenium-section {
    padding: 50px 24px;
  }
  .sonar-canvas-wrap {
    width: 360px;
    height: 360px;
    right: -20px;
  }
  .hero-big-title {
    font-size: 2.6rem;
  }
  .hero-dual-cards {
    grid-template-columns: 1fr;
  }
  .playbill-acts-grid,
  .capabilities-grid-4,
  .metrics-break-strip,
  .gallery-grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .footer-multi-columns {
    grid-template-columns: 1fr 1fr;
  }
  .subpage-grid-2col {
    grid-template-columns: 1fr;
  }
  .curtain-slit-portal {
    width: 340px;
  }
}

@media (max-width: 640px) {
  .theater-topbar {
    padding: 0 20px;
  }
  .hero-proscenium-section {
    padding: 40px 16px;
  }
  .hero-big-title {
    font-size: 2rem;
  }
  .playbill-acts-grid,
  .capabilities-grid-4,
  .metrics-break-strip,
  .gallery-grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-multi-columns {
    grid-template-columns: 1fr;
  }
  .curtain-stage-viewport {
    flex-direction: column;
  }
  .velvet-curtain-left,
  .velvet-curtain-right {
    min-height: 80px;
  }
  .curtain-slit-portal {
    width: 100%;
  }
}