/* ========================================
   展装侠 - 全局样式
   ======================================== */

/* CSS 变量 */
:root {
  --void: #0f172a;
  --surface: #1a365d;
  --gold: #d4af37;
  --lightblue: #2d4a7c;
  --white: #ffffff;
  --slate: #94a3b8;
  --card-bg: rgba(255,255,255,0.05);
  --border: rgba(255,255,255,0.1);
  --radius: 0.625rem;
  --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
  background: var(--void);
  color: var(--white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* 工具类 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.text-gold { color: var(--gold); }
.section { padding: 6rem 0; }

.section-header { text-align: center; margin-bottom: 4rem; }
.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.section-header p {
  font-size: 1.125rem;
  color: var(--slate);
  max-width: 48rem;
  margin: 0 auto;
}
.section-line {
  width: 4rem;
  height: 2px;
  background: var(--gold);
  margin: 1.5rem auto 0;
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--gold);
  color: var(--void);
  font-weight: 600;
  border-radius: 9999px;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.2);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.35);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.875rem 2rem;
  border: 1.5px solid var(--gold);
  color: var(--gold);
  font-weight: 600;
  border-radius: 9999px;
  background: transparent;
  transition: var(--transition);
}
.btn-outline:hover {
  background: var(--gold);
  color: var(--void);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.25);
}

/* 玻璃卡片 */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  transition: var(--transition);
  padding: 0 1.5rem;
}
.navbar.scrolled {
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
}
.nav-logo { display: flex; align-items: center; gap: 0.625rem; }
.nav-logo i { font-size: 2rem; color: var(--gold); }
.nav-brand { font-size: 1.25rem; font-weight: 700; color: var(--white); letter-spacing: 0.05em; display: block; line-height: 1.2; }
.nav-slogan { font-size: 0.75rem; color: rgba(212, 175, 55, 0.8); display: block; line-height: 1.2; }
.nav-menu { display: flex; align-items: center; gap: 2rem; }
.nav-menu a {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  transition: var(--transition);
}
.nav-menu a:hover { color: var(--gold); }
.nav-actions { display: flex; align-items: center; gap: 1.25rem; }
.nav-phone {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.8);
  transition: var(--transition);
}
.nav-phone:hover { color: var(--gold); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.625rem 1.25rem;
  border: 1.5px solid var(--gold);
  color: var(--gold);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 9999px;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--gold); color: var(--void); }
.nav-toggle { display: none; color: var(--white); font-size: 1.5rem; }

/* 移动端菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 5rem;
  left: 0;
  width: 100%;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  padding: 1rem;
  z-index: 999;
}
.mobile-menu a {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  transition: var(--transition);
}
.mobile-menu a:hover { color: var(--gold); }
.mobile-menu.open { display: block; }

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--void);
}
.hero-slideshow {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  transition: transform 6s ease-out;
}
.hero-slide.active img { transform: scale(1); }
.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
}
.hero-dots {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.75rem;
  z-index: 10;
}
.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  transition: var(--transition);
}
.hero-dot.active {
  background: var(--gold);
  transform: scale(1.3);
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.5);
}

.hero-content {
  position: relative;
  z-index: 5;
  text-align: center;
  max-width: 48rem;
  padding: 0 1.5rem;
  padding-top: 7rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(212, 175, 55, 0.15);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 9999px;
  backdrop-filter: blur(4px);
  margin-bottom: 1.5rem;
}
.hero-badge i { color: var(--gold); font-size: 0.875rem; }
.hero-badge span { font-size: 0.875rem; font-weight: 500; color: var(--gold); }
.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 8px rgba(15, 23, 42, 0.8), 0 0 2px rgba(15, 23, 42, 0.9);
}
.hero-subtitle { font-size: 1.25rem; color: var(--white); font-weight: 500; margin-bottom: 0.5rem; text-shadow: 0 2px 4px rgba(0,0,0,0.5); }
.hero-promise { font-size: 1.125rem; color: var(--gold); font-weight: 600; letter-spacing: 0.15em; margin-bottom: 1.5rem; text-shadow: 0 1px 3px rgba(0,0,0,0.4); }
.hero-desc { font-size: 1rem; color: rgba(148, 163, 184, 0.9); max-width: 32rem; margin: 0 auto 2rem; line-height: 1.75; text-shadow: 0 1px 3px rgba(0,0,0,0.4); }
.hero-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-bottom: 3rem; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 28rem;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat { text-align: center; }
.hero-stat i { font-size: 1rem; margin-right: 0.25rem; }
.hero-stat .stat-number { font-size: 2rem; font-weight: 700; color: var(--white); text-shadow: 0 2px 4px rgba(0,0,0,0.5); }
.hero-stat > span:nth-child(3) { font-size: 1.5rem; font-weight: 700; color: var(--white); }
.hero-stat p { font-size: 0.875rem; color: var(--slate); margin-top: 0.25rem; }
.hero-stat:nth-child(2) { border-left: 1px solid rgba(255,255,255,0.15); border-right: 1px solid rgba(255,255,255,0.15); }

.hero-fade {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 8rem;
  background: linear-gradient(to top, var(--void), transparent);
  z-index: 4;
  pointer-events: none;
}

/* ========================================
   六大优势
   ======================================== */
.advantages { background: var(--void); }
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.adv-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem;
  transition: var(--transition);
}
.adv-card:hover {
  border-color: rgba(212, 175, 55, 0.3);
  background: rgba(255,255,255,0.08);
}
.adv-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 0.5rem;
  margin-bottom: 1.25rem;
}
.adv-icon i { font-size: 1.25rem; color: var(--gold); }
.adv-card h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.75rem; transition: var(--transition); }
.adv-card:hover h3 { color: var(--gold); }
.adv-card p { font-size: 0.875rem; color: var(--slate); line-height: 1.75; }

/* ========================================
   服务流程 - 含旋转特效
   ======================================== */
.process { background: var(--void); position: relative; overflow: hidden; }
.process-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
  pointer-events: none;
}
.ring-svg {
  width: 500px;
  height: 500px;
  opacity: 0.15;
  animation: ringRotate 25s linear infinite;
}
@keyframes ringRotate { from { transform: rotate(0deg); } to { transform: rotate(-360deg); } }
.process .container { position: relative; z-index: 1; }

/* ========================================
   数据统计
   ======================================== */
.stats {
  position: relative;
  overflow: hidden;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 8px, #1e293b 8px, #1e293b 9px),
    repeating-linear-gradient(-45deg, transparent, transparent 8px, #1e293b 8px, #1e293b 9px),
    radial-gradient(ellipse at center, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
  background-color: var(--void);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  z-index: 2;
}
.stat-card {
  text-align: center;
  padding: 2rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: var(--transition);
}
.stat-card:hover { border-color: rgba(212, 175, 55, 0.3); }
.stat-value { font-size: 4rem; font-weight: 700; color: var(--gold); }
.stat-suffix { font-size: 2rem; font-weight: 700; color: var(--gold); margin-left: 0.125rem; }
.stat-card p { font-size: 1rem; color: var(--slate); margin-top: 0.5rem; }

.shimmer-bar {
  position: absolute;
  top: 33%;
  left: 0;
  width: 33%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.4), transparent);
  animation: shimmerScan 8s linear infinite;
  z-index: 1;
}
@keyframes shimmerScan { 0%, 100% { transform: translateX(-100%); } 50% { transform: translateX(200%); } }

/* ========================================
   案例展示
   ======================================== */
.cases { background: var(--void); }
.case-featured { margin-bottom: 1.5rem; }
.case-card-large {
  position: relative;
  overflow: hidden;
  border-radius: 0.5rem;
  cursor: pointer;
  aspect-ratio: 21/9;
}
.case-card-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}
.case-card-large:hover img { transform: scale(1.05); }
.case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.3), transparent);
}
.case-card-large .case-info { padding: 2.5rem; }
.case-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
}
.case-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  margin-bottom: 0.5rem;
}
.case-card-large h3 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; transition: var(--transition); }
.case-card-large:hover h3 { color: var(--gold); }
.case-card-large .case-info > p { font-size: 0.875rem; color: rgba(203, 213, 225, 0.9); max-width: 32rem; }
.case-info h4 { font-size: 1rem; font-weight: 600; transition: var(--transition); }
a.case-card:hover h4, a.case-card-large:hover h4 { color: var(--gold); }
.case-info h4::after { content: '\f35d'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 0.625rem; margin-left: 0.375rem; opacity: 0; transition: var(--transition); }
a.case-card:hover h4::after { opacity: 1; }

.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
a.case-card, a.case-card-large { display: block; }
.case-card {
  position: relative;
  overflow: hidden;
  border-radius: 0.5rem;
  cursor: pointer;
}
.case-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform 0.7s ease;
}
.case-card:hover img { transform: scale(1.1); }
.case-card .case-overlay {
  background: linear-gradient(to top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.2), transparent);
  opacity: 0.8;
  transition: opacity 0.3s;
}
.case-card:hover .case-overlay { opacity: 1; }

/* ========================================
   关于展装侠
   ======================================== */
.about { background: var(--surface); }
.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 3.5rem;
  margin-bottom: 2.5rem;
}
.about-main {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2.5rem;
}
.about-main p { font-size: 1.0625rem; color: rgba(203, 213, 225, 0.9); line-height: 1.9; margin-bottom: 1rem; }
.about-main p:last-child { margin-bottom: 0; }
.about-main strong { color: var(--white); font-weight: 600; }

.about-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.principle-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 1rem;
  transition: var(--transition);
}
.principle-card:hover { border-color: rgba(212, 175, 55, 0.3); background: rgba(255,255,255,0.08); }
.principle-card i {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 0.5rem;
  font-size: 1.25rem;
  color: var(--gold);
  flex-shrink: 0;
}
.principle-card h4 { font-size: 1.125rem; font-weight: 600; color: var(--white); }

.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.about-feature {
  text-align: center;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: var(--transition);
}
.about-feature:hover { border-color: rgba(212, 175, 55, 0.3); background: rgba(255,255,255,0.08); }
.about-feature i {
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 0.5rem;
  font-size: 1.125rem;
  color: var(--gold);
  margin: 0 auto 0.75rem;
}
.about-feature h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; }
.about-feature p { font-size: 0.875rem; color: var(--slate); }

/* ========================================
   服务流程
   ======================================== */
.process { background: var(--void); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.process-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.75rem;
  transition: var(--transition);
}
.process-card:hover { border-color: rgba(212, 175, 55, 0.3); background: rgba(255,255,255,0.08); }
.process-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.process-num {
  font-size: 1.875rem;
  font-weight: 700;
  color: rgba(212, 175, 55, 0.2);
  font-family: 'SF Mono', 'Menlo', monospace;
  transition: var(--transition);
}
.process-card:hover .process-num { color: rgba(212, 175, 55, 0.4); }
.process-badge {
  padding: 0.25rem 0.75rem;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.25);
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
}
.process-body i { font-size: 1.25rem; color: var(--gold); margin-bottom: 0.75rem; display: block; }
.process-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.75rem; transition: var(--transition); }
.process-card:hover h3 { color: var(--gold); }
.process-body p { font-size: 0.875rem; color: var(--slate); line-height: 1.75; }
.process-cta { text-align: center; margin-top: 3.5rem; }

/* ========================================
   联系方式
   ======================================== */
.contact { background: var(--surface); }
.contact-grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 3.5rem;
}
.contact-info h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 1.5rem; }
.contact-list { margin-bottom: 2rem; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.contact-item > i {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 0.5rem;
  font-size: 1rem;
  color: var(--gold);
  flex-shrink: 0;
}
.contact-item span { font-size: 0.875rem; color: var(--slate); display: block; margin-bottom: 0.125rem; }
.contact-item a, .contact-item strong, .contact-item > div > p {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--white);
  transition: var(--transition);
}
.contact-item a:hover { color: var(--gold); }

.wechat-item { cursor: pointer; }
.wechat-item:hover > div > strong { color: var(--gold); }
.wechat-row { display: flex; align-items: center; gap: 0.5rem; }
.copy-icon { font-size: 0.875rem; color: rgba(212, 175, 55, 0.6); transition: var(--transition); }
.wechat-item:hover .copy-icon { color: var(--gold); }
.copy-tip { font-size: 0.75rem !important; color: #4ade80 !important; margin-top: 0.25rem; display: none; }
.copy-tip.show { display: block; }

.contact-qr {
  text-align: center;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.contact-qr i { font-size: 3rem; color: rgba(212, 175, 55, 0.5); margin-bottom: 0.5rem; }
.contact-qr p { font-size: 0.875rem; color: var(--slate); }

.contact-cta-panel {
  padding: 2.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.contact-cta-panel h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 1rem; }
.contact-cta-panel > p { color: var(--slate); margin-bottom: 2rem; max-width: 28rem; margin-left: auto; margin-right: auto; }
.contact-buttons { max-width: 20rem; margin: 0 auto; width: 100%; }
.contact-buttons > * + * { margin-top: 1rem; }
.contact-btn-phone,
.contact-btn-wechat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1rem;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 0.5rem;
  color: var(--gold);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
}
.contact-btn-phone:hover,
.contact-btn-wechat:hover { background: rgba(212, 175, 55, 0.2); }
.contact-note { font-size: 0.75rem; color: var(--slate); margin-top: 1.5rem; }

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-logo { display: flex; align-items: center; gap: 0.625rem; margin-bottom: 1rem; }
.footer-logo i { font-size: 1.75rem; color: var(--gold); }
.footer-logo span { font-size: 1.25rem; font-weight: 700; }
.footer-brand > p { font-size: 0.875rem; color: var(--slate); line-height: 1.75; margin-bottom: 1rem; }
.footer-slogan { font-size: 0.875rem; color: var(--slate); }
.footer-slogan span { color: rgba(212, 175, 55, 0.8); }
.footer-links h4 {
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}
.footer-links a {
  display: block;
  font-size: 0.875rem;
  color: var(--slate);
  margin-bottom: 0.625rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--gold); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.footer-bottom p { font-size: 0.75rem; color: var(--slate); }

/* ========================================
   案例详情页
   ======================================== */
.case-detail-hero {
  position: relative;
  height: 60vh;
  min-height: 400px;
  overflow: hidden;
}
.case-detail-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.case-detail-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--void) 0%, rgba(15,23,42,0.6) 50%, rgba(15,23,42,0.3) 100%);
}
.case-detail-hero-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 3rem 0;
}
.case-detail-hero-content .container { max-width: 900px; }
.case-detail-hero-content .case-tag {
  font-size: 0.875rem;
  padding: 0.375rem 1rem;
}
.case-detail-hero-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-top: 0.75rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.case-detail-body {
  padding: 4rem 0;
  background: var(--void);
}
.case-detail-body .container { max-width: 900px; }
.case-detail-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--gold);
}
.case-detail-body p {
  font-size: 1rem;
  color: rgba(203, 213, 225, 0.9);
  line-height: 1.9;
  margin-bottom: 1.5rem;
}
.case-detail-body ul {
  margin-bottom: 2rem;
  padding-left: 1.5rem;
}
.case-detail-body ul li {
  color: rgba(203, 213, 225, 0.9);
  line-height: 2;
  font-size: 1rem;
}
.case-detail-body ul li::marker { color: var(--gold); }

.case-detail-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 3rem 0;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.case-meta-item { text-align: center; }
.case-meta-item span {
  display: block;
  font-size: 0.75rem;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.case-meta-item strong {
  font-size: 1.125rem;
  color: var(--white);
}

.case-detail-actions {
  display: flex;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--slate);
  font-size: 0.875rem;
  transition: var(--transition);
}
.back-link:hover { color: var(--gold); }

.detail-navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.detail-navbar .nav-container { height: 4rem; }

/* ========================================
   滚动动画
   ======================================== */
.scroll-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1023px) {
  .nav-menu, .nav-actions { display: none; }
  .nav-toggle { display: block; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-main { order: 2; }
  .about-principles { order: 1; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .hero-title { font-size: 2.5rem; }
  .section-header h2 { font-size: 2rem; }
  .section { padding: 4rem 0; }
  .advantages-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-value { font-size: 2.5rem; }
  .case-grid { grid-template-columns: 1fr; }
  .case-card-large { aspect-ratio: 16/9; }
  .service-items { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .hero-stats { gap: 0.75rem; }
  .hero-stat .stat-number { font-size: 1.5rem; }
}