/* ============================================================
   臻筑空间装饰设计 - 企业官网全站样式
   高级商务风格 · 深灰(#1a1a2e) + 金色(#c9a96e)
   3D 变换 + 滚动视差 + Intersection Observer 入场动画
   ============================================================ */

/* ---------- 1. 变量与重置 ---------- */
:root {
  --color-dark: #1a1a2e;
  --color-dark-2: #232342;
  --color-dark-3: #2c2c4e;
  --color-gold: #c9a96e;
  --color-gold-light: #e0c694;
  --color-gold-dark: #a8864a;
  --color-bg: #f5f5f0;
  --color-white: #ffffff;
  --color-text: #3a3a45;
  --color-text-light: #8a8a94;
  --color-line: #e4e4dc;
  --font-title: 'Noto Sans SC', 'Source Han Sans CN', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans CN', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius-card: 8px;
  --radius-btn: 4px;
  --shadow-soft: 0 8px 30px rgba(26, 26, 46, 0.08);
  --shadow-card: 0 10px 40px rgba(26, 26, 46, 0.14);
  --shadow-gold: 0 8px 24px rgba(201, 169, 110, 0.35);
  --ease-3d: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration: 0.7s;
  --nav-h: 76px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.3s; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: 14px; }
h1, h2, h3, h4, h5 { font-family: var(--font-title); color: var(--color-dark); line-height: 1.35; }
::selection { background: rgba(201, 169, 110, 0.3); }
:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; }

/* ---------- 2. 通用工具 ---------- */
.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section--dark { background: var(--color-dark); }
.section--light { background: var(--color-white); }

.section-head { text-align: center; margin-bottom: 56px; }
.section-head .en { font-size: 13px; letter-spacing: 6px; color: var(--color-gold); text-transform: uppercase; font-weight: 700; }
.section-head h2 { font-size: 36px; font-weight: 900; margin-top: 10px; position: relative; display: inline-block; }
.section-head h2::after {
  content: ''; position: absolute; left: 50%; bottom: -14px; transform: translateX(-50%);
  width: 48px; height: 3px; background: linear-gradient(90deg, var(--color-gold-dark), var(--color-gold-light));
  border-radius: 2px;
}
.section-head .sub { color: var(--color-text-light); margin-top: 26px; max-width: 640px; margin-left: auto; margin-right: auto; }
.section-head--left { text-align: left; }
.section-head--left h2::after { left: 0; transform: none; }
.section-head--left .sub { margin-left: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 34px; border-radius: var(--radius-btn);
  font-size: 15px; font-weight: 700; letter-spacing: 1px;
  transition: all 0.35s var(--ease-3d); position: relative; overflow: hidden;
  will-change: transform;
}
.btn-gold { background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold) 55%, var(--color-gold-dark)); color: #fff; box-shadow: var(--shadow-gold); }
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 14px 32px rgba(201, 169, 110, 0.45); }
.btn-outline { border: 1.5px solid rgba(255, 255, 255, 0.5); color: #fff; }
.btn-outline:hover { border-color: var(--color-gold); color: var(--color-gold); transform: translateY(-3px); }
.btn-dark { background: var(--color-dark); color: #fff; }
.btn-dark:hover { background: var(--color-gold); color: #fff; transform: translateY(-3px); }
.btn-sm { padding: 9px 22px; font-size: 13px; }

/* ---------- 3. 滚动入场动画（核心 3D 效果） ---------- */
[data-reveal] {
  opacity: 0;
  transform: perspective(1200px) rotateX(18deg) translateY(60px);
  transform-origin: center top;
  transition: opacity var(--duration) var(--ease-3d), transform var(--duration) var(--ease-3d);
  will-change: transform, opacity;
}
[data-reveal="left"] { transform: perspective(1200px) rotateY(28deg) translateX(-80px); transform-origin: left center; }
[data-reveal="right"] { transform: perspective(1200px) rotateY(-28deg) translateX(80px); transform-origin: right center; }
[data-reveal="zoom"] { transform: perspective(1200px) scale(0.72) translateZ(-80px); }
[data-reveal="flip"] { transform: perspective(1200px) rotateX(-40deg) translateY(40px); }
[data-reveal].in-view { opacity: 1; transform: perspective(1200px) rotateX(0) rotateY(0) scale(1) translate(0, 0) translateZ(0); }

/* 延迟入场 */
[data-delay="1"] { transition-delay: 0.12s; }
[data-delay="2"] { transition-delay: 0.24s; }
[data-delay="3"] { transition-delay: 0.36s; }
[data-delay="4"] { transition-delay: 0.48s; }
[data-delay="5"] { transition-delay: 0.6s; }

/* 3D 视差层 */
.parallax-layer { will-change: transform; transform: translateZ(0); }

/* ---------- 4. 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: all 0.45s var(--ease-3d);
}
.nav.scrolled {
  background: rgba(22, 22, 38, 0.82);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.25);
  height: 64px;
}
.nav-inner { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-logo { display: flex; align-items: center; gap: 12px; color: #fff; }
.nav-logo .logo-mark {
  width: 42px; height: 42px; border-radius: 6px; position: relative;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-title); font-weight: 900; font-size: 20px; color: #fff;
  box-shadow: var(--shadow-gold);
  transform: rotate(-4deg);
}
.nav-logo .logo-text { line-height: 1.2; }
.nav-logo .logo-text b { display: block; font-size: 18px; letter-spacing: 3px; font-weight: 900; }
.nav-logo .logo-text span { font-size: 10px; letter-spacing: 4px; color: var(--color-gold-light); text-transform: uppercase; }
.nav-menu { display: flex; align-items: center; gap: 34px; }
.nav-menu a { color: rgba(255, 255, 255, 0.82); font-size: 15px; font-weight: 500; letter-spacing: 1px; position: relative; padding: 6px 2px; }
.nav-menu a::after {
  content: ''; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%) scaleX(0);
  width: 100%; height: 2px; background: var(--color-gold); transition: transform 0.35s var(--ease-3d);
}
.nav-menu a:hover, .nav-menu a.active { color: var(--color-gold-light); }
.nav-menu a:hover::after, .nav-menu a.active::after { transform: translateX(-50%) scaleX(1); }
.nav-phone { display: flex; align-items: center; gap: 10px; color: #fff; }
.nav-phone .icon {
  width: 38px; height: 38px; border-radius: 50%; border: 1.5px solid var(--color-gold);
  display: flex; align-items: center; justify-content: center; color: var(--color-gold); font-size: 15px;
  animation: phonePulse 2.4s infinite;
}
@keyframes phonePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(201, 169, 110, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(201, 169, 110, 0); }
}
.nav-phone b { font-size: 16px; letter-spacing: 1px; }
.nav-phone small { display: block; font-size: 10px; color: var(--color-gold-light); letter-spacing: 2px; text-align: right; }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 6px; border: 1px solid rgba(255,255,255,0.25); color: #fff; font-size: 18px; align-items: center; justify-content: center; z-index: 1001; flex: 0 0 auto; }

/* ---------- 5. 首屏 3D 轮播 Banner ---------- */
.banner { position: relative; height: 100vh; min-height: 640px; overflow: hidden; background: var(--color-dark); }
.banner-stage { position: absolute; inset: 0; perspective: 1400px; }
.banner-slide {
  position: absolute; inset: 0; overflow: hidden;
  opacity: 0; visibility: hidden;
  transform: rotateY(70deg) scale(0.92) translateZ(-260px);
  transform-origin: center center;
  transition: transform 1.1s var(--ease-3d), opacity 0.9s ease, visibility 0s linear 1.1s;
  will-change: transform, opacity;
}
.banner-slide.active { opacity: 1; visibility: visible; transform: rotateY(0) scale(1) translateZ(0); transition: transform 1.1s var(--ease-3d), opacity 0.9s ease, visibility 0s; z-index: 2; }
.banner-slide.prev { opacity: 0; transform: rotateY(-70deg) scale(0.92) translateZ(-260px); transition: transform 1.1s var(--ease-3d), opacity 0.9s ease, visibility 0s linear 1.1s; }
.banner-slide .bg {
  position: absolute; inset: -8% -8% -8% -8%;
  background-size: cover; background-position: center;
  will-change: transform;
}
.banner-slide::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(26, 26, 46, 0.45) 0%, rgba(26, 26, 46, 0.35) 40%, rgba(26, 26, 46, 0.82) 100%);
}
.banner-content {
  position: absolute; z-index: 3; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; color: #fff; perspective: 1000px;
}
.banner-kicker {
  font-size: 13px; letter-spacing: 8px; color: var(--color-gold-light);
  text-transform: uppercase; opacity: 0;
  transform: translateZ(-120px) rotateX(40deg);
  transition: all 0.8s var(--ease-3d) 0.25s;
}
.banner-title {
  font-size: clamp(40px, 7vw, 76px); font-weight: 900; letter-spacing: 6px; margin: 18px 0 6px;
  text-shadow: 0 6px 40px rgba(0, 0, 0, 0.4);
  opacity: 0; transform: translateZ(-160px) rotateX(55deg) translateY(40px);
  transition: all 0.9s var(--ease-3d) 0.4s;
}
.banner-title .gold { color: var(--color-gold-light); }
.banner-sub {
  font-size: clamp(15px, 2vw, 20px); color: rgba(255, 255, 255, 0.85); letter-spacing: 3px; font-weight: 300;
  opacity: 0; transform: translateZ(-100px) rotateX(35deg) translateY(30px);
  transition: all 0.9s var(--ease-3d) 0.55s;
}
.banner-slide.active .banner-kicker, .banner-slide.active .banner-title, .banner-slide.active .banner-sub {
  opacity: 1; transform: translateZ(0) rotateX(0) translateY(0);
}
.banner-btns { display: flex; gap: 18px; margin-top: 44px; opacity: 0; transform: translateY(30px); transition: all 0.8s var(--ease-3d) 0.7s; }
.banner-slide.active .banner-btns { opacity: 1; transform: translateY(0); }
.banner-indicators { position: absolute; z-index: 5; bottom: 36px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; }
.banner-indicators button { width: 34px; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, 0.3); transition: all 0.4s var(--ease-3d); }
.banner-indicators button.active { background: var(--color-gold); width: 54px; }
.banner-arrow {
  position: absolute; z-index: 5; top: 50%; transform: translateY(-50%);
  width: 50px; height: 50px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3); color: #fff; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.35s var(--ease-3d); background: rgba(26, 26, 46, 0.25);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.banner-arrow:hover { background: var(--color-gold); border-color: var(--color-gold); }
.banner-arrow.prev { left: 28px; }
.banner-arrow.next { right: 28px; }
.banner-scroll {
  position: absolute; z-index: 5; bottom: 22px; left: 50%; transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6); font-size: 11px; letter-spacing: 3px; display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.banner-scroll .line { width: 1px; height: 40px; background: linear-gradient(180deg, var(--color-gold), transparent); animation: scrollLine 1.8s infinite; }
@keyframes scrollLine { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- 6. 服务介绍（3D 翻转卡片） ---------- */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; perspective: 1600px; }
.service-card { height: 340px; perspective: 1200px; cursor: pointer; }
.service-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.8s var(--ease-3d);
  will-change: transform;
}
.service-card:hover .service-inner { transform: rotateY(180deg); }
.service-face {
  position: absolute; inset: 0; border-radius: var(--radius-card);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  padding: 34px 26px; text-align: center;
  -webkit-backface-visibility: hidden; backface-visibility: hidden;
}
.service-front { background: var(--color-white); box-shadow: var(--shadow-soft); transform: translateZ(40px); }
.service-front .icon {
  width: 74px; height: 74px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-dark), var(--color-dark-3));
  color: var(--color-gold); font-size: 28px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 26px rgba(26, 26, 46, 0.28);
  transition: all 0.4s var(--ease-3d);
}
.service-card:hover .service-front .icon { background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark)); color: #fff; transform: translateZ(60px) scale(1.08); }
.service-front h3 { font-size: 20px; font-weight: 900; }
.service-front .price { color: var(--color-gold-dark); font-weight: 700; font-size: 14px; letter-spacing: 1px; }
.service-front .tip { position: absolute; bottom: 20px; font-size: 12px; color: var(--color-text-light); letter-spacing: 2px; }
.service-back {
  background: linear-gradient(150deg, var(--color-dark), var(--color-dark-2));
  color: #fff; transform: rotateY(180deg) translateZ(40px);
  box-shadow: var(--shadow-card);
}
.service-back h3 { color: var(--color-gold-light); font-size: 20px; }
.service-back p { font-size: 13.5px; color: rgba(255, 255, 255, 0.75); line-height: 1.9; }
.service-back .btn { margin-top: 8px; }

/* ---------- 7. 数据统计区 ---------- */
.stats { background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-3) 100%); position: relative; overflow: hidden; }
.stats::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(201, 169, 110, 0.14) 0%, transparent 45%),
              radial-gradient(circle at 85% 85%, rgba(201, 169, 110, 0.1) 0%, transparent 40%);
}
.stats-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stats-item { text-align: center; color: #fff; padding: 20px 0; }
.stats-item .num { font-size: clamp(42px, 5vw, 60px); font-weight: 900; font-family: var(--font-title); line-height: 1; }
.stats-item .num .suffix { font-size: 0.55em; color: var(--color-gold-light); margin-left: 2px; }
.stats-item .label { margin-top: 14px; color: rgba(255, 255, 255, 0.65); letter-spacing: 3px; font-size: 14px; }
.stats-item::after {
  content: ''; display: block; width: 34px; height: 2px; margin: 16px auto 0;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

/* ---------- 8. 精选案例瀑布流 ---------- */
.cases-masonry { columns: 3; column-gap: 24px; perspective: 1600px; }
.case-item {
  break-inside: avoid; margin-bottom: 24px; border-radius: var(--radius-card); overflow: hidden;
  position: relative; cursor: pointer; background: var(--color-white); box-shadow: var(--shadow-soft);
  transform: translateZ(0);
}
.case-item .thumb { position: relative; overflow: hidden; }
.case-item img {
  width: 100%; transition: transform 0.9s var(--ease-3d), filter 0.6s;
  will-change: transform;
}
.case-item:hover img { transform: perspective(1000px) scale(1.08) translateZ(30px); filter: brightness(0.75); }
.case-item .mask {
  position: absolute; inset: 0; z-index: 2;
  background: linear-gradient(180deg, transparent 30%, rgba(26, 26, 46, 0.85) 100%);
  display: flex; flex-direction: column; justify-content: flex-end; padding: 24px;
  opacity: 0; transform: translateY(20px);
  transition: all 0.55s var(--ease-3d);
}
.case-item:hover .mask { opacity: 1; transform: translateY(0); }
.case-item .mask .tag { align-self: flex-start; background: var(--color-gold); color: #fff; font-size: 11px; letter-spacing: 2px; padding: 3px 12px; border-radius: 20px; margin-bottom: 10px; }
.case-item .mask h3 { color: #fff; font-size: 18px; font-weight: 900; }
.case-item .mask .meta { color: rgba(255, 255, 255, 0.75); font-size: 12.5px; margin-top: 6px; letter-spacing: 1px; }
.case-item .more { position: absolute; z-index: 3; top: 16px; right: 16px; width: 38px; height: 38px; border-radius: 50%; background: rgba(255, 255, 255, 0.9); color: var(--color-dark); display: flex; align-items: center; justify-content: center; font-size: 14px; opacity: 0; transform: scale(0.4) rotate(-90deg); transition: all 0.5s var(--ease-3d); }
.case-item:hover .more { opacity: 1; transform: scale(1) rotate(0); }
.case-item:hover { box-shadow: var(--shadow-card); transform: translateZ(20px); }

/* ---------- 9. 流程时间线（3D 排列） ---------- */
.process { background: var(--color-white); }
.process-track { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; perspective: 2000px; }
.process-track::before {
  content: ''; position: absolute; top: 42px; left: 8%; right: 8%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold) 15%, var(--color-gold) 85%, transparent);
  z-index: 0;
}
.process-step { position: relative; z-index: 1; text-align: center; padding: 0 12px; transform: perspective(1000px) rotateY(-24deg) translateZ(-60px); transform-origin: left center; transition: transform 0.8s var(--ease-3d); }
.process-step.in-view { transform: perspective(1000px) rotateY(0) translateZ(0); }
.process-step:hover { transform: perspective(1000px) rotateY(0) translateZ(40px); }
.process-step .dot {
  width: 84px; height: 84px; margin: 0 auto 20px; border-radius: 50%;
  background: var(--color-white); border: 2px solid var(--color-gold);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-title); font-size: 26px; font-weight: 900; color: var(--color-gold-dark);
  box-shadow: 0 10px 30px rgba(201, 169, 110, 0.25);
  position: relative; transition: all 0.5s var(--ease-3d);
}
.process-step:hover .dot { background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark)); color: #fff; transform: scale(1.1) translateZ(30px); }
.process-step h4 { font-size: 17px; font-weight: 900; margin-bottom: 8px; }
.process-step p { font-size: 12.5px; color: var(--color-text-light); }

/* ---------- 10. 客户评价 3D 轮播 ---------- */
.testimonials { background: var(--color-bg); overflow: hidden; }
.t-wrap { perspective: 1400px; max-width: 980px; margin: 0 auto; position: relative; }
.t-stage { position: relative; height: 300px; transform-style: preserve-3d; }
.t-card {
  position: absolute; inset: 0; margin: 0 auto; max-width: 760px;
  background: var(--color-white); border-radius: var(--radius-card); box-shadow: var(--shadow-card);
  padding: 44px 52px; display: flex; flex-direction: column; justify-content: center; gap: 18px;
  transform-style: preserve-3d;
  transition: transform 0.9s var(--ease-3d), opacity 0.6s ease, box-shadow 0.6s;
  will-change: transform, opacity;
}
.t-card .quote-mark { font-size: 64px; color: var(--color-gold); font-family: Georgia, serif; line-height: 0.4; margin-bottom: 4px; }
.t-card .content { font-size: 16.5px; line-height: 2; color: var(--color-text); }
.t-card .person { display: flex; align-items: center; gap: 14px; }
.t-card .avatar {
  width: 52px; height: 52px; border-radius: 50%; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; font-family: var(--font-title);
  box-shadow: 0 6px 18px rgba(26, 26, 46, 0.2);
}
.t-card .person b { display: block; color: var(--color-dark); font-size: 16px; }
.t-card .person small { color: var(--color-text-light); font-size: 12.5px; letter-spacing: 1px; }
.t-card.on { opacity: 1; transform: rotateY(0deg) translateZ(0) scale(1); }
.t-card.off-left { opacity: 0; transform: rotateY(55deg) translateX(-220px) translateZ(-260px) scale(0.85); }
.t-card.off-right { opacity: 0; transform: rotateY(-55deg) translateX(220px) translateZ(-260px) scale(0.85); }
.t-nav { display: flex; justify-content: center; gap: 12px; margin-top: 36px; }
.t-nav button { width: 44px; height: 44px; border-radius: 50%; border: 1.5px solid var(--color-line); color: var(--color-dark); font-size: 15px; transition: all 0.35s var(--ease-3d); background: #fff; }
.t-nav button:hover { background: var(--color-gold); border-color: var(--color-gold); color: #fff; transform: translateY(-3px); }

/* ---------- 11. CTA 区 ---------- */
.cta {
  position: relative; padding: 110px 0; text-align: center; overflow: hidden;
  background: linear-gradient(135deg, var(--color-dark) 0%, #101020 100%);
}
.cta::before {
  content: ''; position: absolute; inset: 0; opacity: 0.12;
  background-image: url('/static/images/banner-1.jpg'); background-size: cover; background-position: center;
  animation: ctaPan 30s linear infinite alternate;
}
@keyframes ctaPan { from { transform: scale(1); } to { transform: scale(1.12); } }
.cta .container { position: relative; z-index: 1; }
.cta h2 { color: #fff; font-size: clamp(30px, 4vw, 44px); font-weight: 900; letter-spacing: 3px; }
.cta p { color: rgba(255, 255, 255, 0.7); margin: 18px auto 40px; max-width: 560px; letter-spacing: 1px; }
.cta .phone { display: inline-block; margin-top: 22px; color: var(--color-gold-light); font-size: 22px; letter-spacing: 2px; font-weight: 700; }

/* ---------- 12. 页脚 ---------- */
.footer { background: #131323; color: rgba(255, 255, 255, 0.65); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 46px; padding-bottom: 56px; }
.footer h4 { color: #fff; font-size: 16px; letter-spacing: 2px; margin-bottom: 22px; position: relative; padding-bottom: 12px; }
.footer h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--color-gold); }
.footer .about p { font-size: 13.5px; line-height: 2; }
.footer .links li { margin-bottom: 12px; }
.footer .links a { font-size: 14px; display: inline-flex; align-items: center; gap: 8px; transition: all 0.3s; }
.footer .links a::before { content: '›'; color: var(--color-gold); }
.footer .links a:hover { color: var(--color-gold-light); padding-left: 6px; }
.footer .contact li { display: flex; gap: 12px; margin-bottom: 14px; font-size: 13.5px; align-items: flex-start; }
.footer .contact i { color: var(--color-gold); margin-top: 4px; width: 16px; text-align: center; }
.footer .qrcode { text-align: center; }
.footer .qrcode img { width: 128px; height: 128px; border-radius: 8px; margin: 0 auto 12px; border: 2px solid rgba(255, 255, 255, 0.1); }
.footer .qrcode p { font-size: 12.5px; letter-spacing: 1px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 12.5px; }
.footer-bottom a:hover { color: var(--color-gold-light); }

/* ============================================================
   子页面公共样式
   ============================================================ */

/* ---------- 13. 内页 Banner ---------- */
.page-hero {
  position: relative; padding: 190px 0 100px; text-align: center; overflow: hidden;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-3) 100%);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background-image: var(--hero-bg, url('/static/images/banner-2.jpg'));
  background-size: cover; background-position: center; opacity: 0.18;
}
.page-hero::after { content: ''; position: absolute; inset: 0; background: rgba(26, 26, 46, 0.35); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 46px); font-weight: 900; letter-spacing: 4px; }
.page-hero .crumbs { margin-top: 16px; color: rgba(255, 255, 255, 0.6); font-size: 13px; letter-spacing: 2px; }
.page-hero .crumbs a:hover { color: var(--color-gold-light); }
.page-hero .crumbs .sep { margin: 0 10px; color: var(--color-gold); }

/* ---------- 14. 关于页：公司简介 ---------- */
.about-intro { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
.about-intro .text h2 { font-size: 32px; font-weight: 900; margin-bottom: 22px; }
.about-intro .text h2 span { color: var(--color-gold-dark); }
.about-intro .text p { color: var(--color-text); margin-bottom: 16px; line-height: 2; }
.about-intro .text .feature-list { margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.about-intro .text .feature-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--color-dark); font-weight: 500; }
.about-intro .text .feature-list i { color: var(--color-gold-dark); }
.about-img { position: relative; perspective: 1200px; }
.about-img .main-img {
  border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card);
  transform: rotateY(-8deg) rotateX(3deg) translateZ(0);
  transition: transform 1s var(--ease-3d);
  will-change: transform;
}
.about-img:hover .main-img { transform: rotateY(0) rotateX(0) translateZ(30px); }
.about-img .float-badge {
  position: absolute; right: -18px; bottom: 36px; z-index: 2;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark));
  color: #fff; padding: 20px 26px; border-radius: var(--radius-card);
  text-align: center; box-shadow: var(--shadow-gold);
  transform: rotate(-3deg);
}
.about-img .float-badge b { display: block; font-size: 34px; font-weight: 900; line-height: 1.1; }
.about-img .float-badge span { font-size: 12px; letter-spacing: 2px; opacity: 0.9; }
.about-img .frame-deco { position: absolute; left: -22px; top: -22px; width: 70%; height: 70%; border: 2px solid var(--color-gold); border-radius: var(--radius-card); z-index: -1; }

/* ---------- 15. 发展历程时间线 ---------- */
.timeline { position: relative; max-width: 960px; margin: 0 auto; perspective: 1600px; }
.timeline::before { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; transform: translateX(-50%); background: linear-gradient(180deg, transparent, var(--color-gold) 10%, var(--color-gold) 90%, transparent); }
.tl-item { position: relative; width: 50%; padding: 0 48px 56px 0; }
.tl-item:nth-child(even) { left: 50%; padding: 0 0 56px 48px; }
.tl-item .tl-dot {
  position: absolute; top: 6px; right: -9px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-gold); border: 4px solid #fff; box-shadow: 0 0 0 2px var(--color-gold);
}
.tl-item:nth-child(even) .tl-dot { right: auto; left: -9px; }
.tl-card {
  background: var(--color-white); border-radius: var(--radius-card); padding: 26px 30px;
  box-shadow: var(--shadow-soft); border-left: 3px solid var(--color-gold);
  transition: transform 0.7s var(--ease-3d), box-shadow 0.5s;
}
.tl-item:nth-child(even) .tl-card { border-left: none; border-right: 3px solid var(--color-gold); }
.tl-card:hover { box-shadow: var(--shadow-card); transform: translateZ(30px); }
.tl-card .year { color: var(--color-gold-dark); font-weight: 900; font-size: 22px; font-family: var(--font-title); }
.tl-card h4 { margin: 6px 0 8px; font-size: 17px; }
.tl-card p { font-size: 13.5px; color: var(--color-text-light); line-height: 1.9; }

/* ---------- 16. 团队卡片 ---------- */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; perspective: 1600px; }
.team-card { perspective: 1200px; height: 440px; }
.team-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.9s var(--ease-3d);
  will-change: transform;
}
.team-card:hover .team-inner { transform: rotateY(180deg); }
.team-face {
  position: absolute; inset: 0; border-radius: var(--radius-card); overflow: hidden;
  -webkit-backface-visibility: hidden; backface-visibility: hidden;
  background: var(--color-white); box-shadow: var(--shadow-soft);
}
.team-front img { width: 100%; height: 100%; object-fit: cover; }
.team-front .info {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 20px 22px;
  background: linear-gradient(180deg, transparent, rgba(26, 26, 46, 0.9));
  color: #fff;
}
.team-front .info b { font-size: 18px; display: block; }
.team-front .info span { font-size: 12.5px; color: var(--color-gold-light); letter-spacing: 2px; }
.team-back {
  transform: rotateY(180deg);
  background: linear-gradient(150deg, var(--color-dark), var(--color-dark-2));
  color: #fff; display: flex; flex-direction: column; justify-content: center; align-items: center;
  padding: 34px 28px; text-align: center;
}
.team-back h3 { color: var(--color-gold-light); font-size: 20px; margin-bottom: 6px; }
.team-back .pos { font-size: 12.5px; color: rgba(255, 255, 255, 0.6); letter-spacing: 3px; margin-bottom: 18px; }
.team-back p { font-size: 13.5px; line-height: 2; color: rgba(255, 255, 255, 0.8); }

/* ---------- 17. 荣誉资质 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; perspective: 1600px; }
.cert-card {
  position: relative; background: var(--color-white); border-radius: var(--radius-card);
  padding: 42px 30px; text-align: center; box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-line); overflow: hidden;
  transform: perspective(1000px) translateZ(0);
  transition: transform 0.7s var(--ease-3d), box-shadow 0.5s;
}
.cert-card:hover { transform: perspective(1000px) translateZ(46px) rotateX(3deg); box-shadow: var(--shadow-card); }
.cert-card .medal {
  width: 74px; height: 74px; margin: 0 auto 18px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, var(--color-gold-light), var(--color-gold-dark) 70%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 28px;
  box-shadow: 0 12px 26px rgba(201, 169, 110, 0.4);
  transition: transform 0.6s var(--ease-3d);
}
.cert-card:hover .medal { transform: rotateY(360deg); }
.cert-card h3 { font-size: 16.5px; font-weight: 900; margin-bottom: 8px; }
.cert-card .year { font-size: 13px; color: var(--color-text-light); letter-spacing: 2px; }
.cert-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold-dark));
  transform: scaleX(0); transform-origin: left; transition: transform 0.6s var(--ease-3d);
}
.cert-card:hover::after { transform: scaleX(1); }

/* ---------- 18. 服务页 ---------- */
.service-list-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; perspective: 1800px; }
.service-item {
  background: var(--color-white); border-radius: var(--radius-card); box-shadow: var(--shadow-soft);
  overflow: hidden; transition: transform 0.7s var(--ease-3d), box-shadow 0.5s;
  transform: perspective(1200px) translateZ(0);
}
.service-item:hover { transform: perspective(1200px) translateZ(40px) rotateX(2deg); box-shadow: var(--shadow-card); }
.service-item .head { padding: 34px 32px 24px; display: flex; gap: 20px; align-items: flex-start; }
.service-item .icon {
  flex: 0 0 62px; height: 62px; border-radius: 12px;
  background: linear-gradient(135deg, var(--color-dark), var(--color-dark-3));
  color: var(--color-gold); font-size: 24px;
  display: flex; align-items: center; justify-content: center;
}
.service-item:hover .icon { background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark)); color: #fff; }
.service-item .head h3 { font-size: 19px; font-weight: 900; }
.service-item .head .price { color: var(--color-gold-dark); font-weight: 700; font-size: 13.5px; margin-top: 4px; }
.service-item .head p { font-size: 13px; color: var(--color-text-light); margin-top: 8px; line-height: 1.8; }
.service-item .expand-btn { width: 100%; padding: 15px; border-top: 1px solid var(--color-line); color: var(--color-dark); font-size: 14px; letter-spacing: 2px; display: flex; align-items: center; justify-content: center; gap: 8px; transition: all 0.35s; }
.service-item .expand-btn i { transition: transform 0.5s var(--ease-3d); }
.service-item.open .expand-btn { color: var(--color-gold-dark); }
.service-item.open .expand-btn i { transform: rotate(180deg); }
.service-item .detail {
  max-height: 0; overflow: hidden;
  transition: max-height 0.8s var(--ease-3d), padding 0.5s;
  transform: perspective(1000px) rotateX(-30deg);
  transform-origin: top;
}
.service-item.open .detail { max-height: 400px; transform: perspective(1000px) rotateX(0); }
.service-item .detail-inner { padding: 0 32px 30px; font-size: 13.5px; line-height: 2; color: var(--color-text); }
.service-item .detail-inner ul { list-style: none; }
.service-item .detail-inner li { padding-left: 20px; position: relative; }
.service-item .detail-inner li::before { content: '◆'; position: absolute; left: 0; top: 0; font-size: 9px; color: var(--color-gold); }

/* 服务流程说明 */
.service-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; perspective: 1600px; }
.service-flow .sf-item {
  position: relative; background: var(--color-white); border-radius: var(--radius-card);
  padding: 30px 24px; text-align: center; box-shadow: var(--shadow-soft);
  transition: transform 0.7s var(--ease-3d), box-shadow 0.5s;
}
.service-flow .sf-item:hover { transform: perspective(1000px) translateZ(36px); box-shadow: var(--shadow-card); }
.service-flow .sf-item .no { font-size: 40px; font-weight: 900; font-family: var(--font-title); color: var(--color-line); line-height: 1; transition: color 0.4s; }
.service-flow .sf-item:hover .no { color: var(--color-gold); }
.service-flow .sf-item h4 { font-size: 16px; margin: 10px 0 8px; }
.service-flow .sf-item p { font-size: 12.5px; color: var(--color-text-light); }

/* ---------- 19. 案例页：筛选 + 网格 ---------- */
.filter-bar { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 48px; }
.filter-btn {
  padding: 10px 28px; border-radius: 30px; border: 1.5px solid var(--color-line);
  color: var(--color-text); font-size: 14px; letter-spacing: 1px;
  transition: all 0.4s var(--ease-3d); background: #fff;
}
.filter-btn:hover { border-color: var(--color-gold); color: var(--color-gold-dark); transform: translateY(-2px); }
.filter-btn.active { background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark)); border-color: transparent; color: #fff; box-shadow: var(--shadow-gold); }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; perspective: 1600px; }
.case-card {
  position: relative; border-radius: var(--radius-card); overflow: hidden; cursor: pointer;
  box-shadow: var(--shadow-soft); background: var(--color-white);
  transform-style: preserve-3d;
  transition: transform 0.6s var(--ease-3d), box-shadow 0.5s;
  will-change: transform;
}
.case-card:hover { transform: perspective(1000px) rotateX(2deg) rotateY(-2deg) translateZ(30px) scale(1.02); box-shadow: var(--shadow-card); }
.case-card .thumb { position: relative; overflow: hidden; aspect-ratio: 4/3; }
.case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease-3d); }
.case-card:hover img { transform: perspective(1000px) scale(1.1) translateZ(24px); }
.case-card .info { padding: 20px 22px 22px; }
.case-card .info .tag { display: inline-block; font-size: 11px; color: var(--color-gold-dark); border: 1px solid var(--color-gold); padding: 2px 12px; border-radius: 20px; margin-bottom: 10px; letter-spacing: 1px; }
.case-card .info h3 { font-size: 17px; font-weight: 900; }
.case-card .info .meta { margin-top: 8px; font-size: 12.5px; color: var(--color-text-light); display: flex; gap: 14px; flex-wrap: wrap; }
.case-card .info .meta span { display: inline-flex; align-items: center; gap: 5px; }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 56px; }
.pagination a, .pagination span {
  min-width: 42px; height: 42px; padding: 0 8px; border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; border: 1px solid var(--color-line); color: var(--color-text); font-size: 14px;
  transition: all 0.35s var(--ease-3d);
}
.pagination a:hover { border-color: var(--color-gold); color: var(--color-gold-dark); transform: translateY(-2px); }
.pagination .current { background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold-dark)); color: #fff; border-color: transparent; font-weight: 700; }
.pagination .disabled { opacity: 0.45; pointer-events: none; }

/* 3D 案例详情弹窗 */
.modal-mask {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(16, 16, 32, 0.82);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center; padding: 30px;
  opacity: 0; visibility: hidden;
  transition: opacity 0.5s ease, visibility 0s linear 0.5s;
}
.modal-mask.show { opacity: 1; visibility: visible; transition: opacity 0.5s ease, visibility 0s; }
.modal-box {
  width: 100%; max-width: 900px; max-height: 88vh; overflow-y: auto;
  background: var(--color-white); border-radius: 12px; position: relative;
  transform: perspective(1400px) rotateX(-24deg) translateY(90px) scale(0.9);
  transform-origin: center top;
  transition: transform 0.7s var(--ease-3d);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.5);
}
.modal-mask.show .modal-box { transform: perspective(1400px) rotateX(0) translateY(0) scale(1); }
.modal-close {
  position: sticky; top: 0; z-index: 5; margin-left: auto;
  width: 44px; height: 44px; margin-top: 16px; margin-right: 16px;
  border-radius: 50%; background: var(--color-dark); color: #fff; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.35s;
}
.modal-close:hover { background: var(--color-gold); transform: rotate(90deg); }
.modal-gallery { padding: 0 40px; }
.modal-gallery .main-img { border-radius: 8px; overflow: hidden; max-height: 420px; }
.modal-gallery .main-img img { width: 100%; height: 100%; object-fit: cover; }
.modal-body { padding: 34px 40px 44px; }
.modal-body .tag { display: inline-block; font-size: 12px; color: var(--color-gold-dark); border: 1px solid var(--color-gold); padding: 3px 14px; border-radius: 20px; letter-spacing: 1px; }
.modal-body h2 { font-size: 26px; font-weight: 900; margin: 14px 0 16px; }
.modal-body .spec { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 26px; }
.modal-body .spec div { background: var(--color-bg); border-radius: 6px; padding: 12px 14px; text-align: center; }
.modal-body .spec b { display: block; font-size: 15px; color: var(--color-dark); }
.modal-body .spec small { font-size: 11.5px; color: var(--color-text-light); letter-spacing: 1px; }
.modal-body .desc { font-size: 14px; line-height: 2.1; color: var(--color-text); }
.modal-body .cta-line { margin-top: 30px; padding-top: 24px; border-top: 1px dashed var(--color-line); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
.modal-body .cta-line p { color: var(--color-text-light); font-size: 13px; }

/* ---------- 20. 新闻页 ---------- */
.news-list { max-width: 920px; margin: 0 auto; }
.news-item {
  display: grid; grid-template-columns: 320px 1fr; gap: 34px; align-items: center;
  background: var(--color-white); border-radius: var(--radius-card); box-shadow: var(--shadow-soft);
  padding: 26px; margin-bottom: 26px;
  transition: transform 0.6s var(--ease-3d), box-shadow 0.5s;
  transform: perspective(1200px) translateZ(0);
}
.news-item:hover { transform: perspective(1200px) translateZ(28px); box-shadow: var(--shadow-card); }
.news-item .thumb { border-radius: 6px; overflow: hidden; position: relative; }
.news-item .thumb img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.9s var(--ease-3d); }
.news-item:hover .thumb img { transform: perspective(1000px) scale(1.08) rotateY(-4deg); }
.news-item .body .cat { display: inline-block; font-size: 11.5px; color: var(--color-gold-dark); background: rgba(201, 169, 110, 0.12); padding: 3px 12px; border-radius: 20px; letter-spacing: 1px; margin-bottom: 12px; }
.news-item .body h3 { font-size: 20px; font-weight: 900; line-height: 1.5; margin-bottom: 12px; }
.news-item .body h3 a:hover { color: var(--color-gold-dark); }
.news-item .body .summary { font-size: 13.5px; color: var(--color-text-light); line-height: 1.9; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-item .body .meta { margin-top: 14px; font-size: 12.5px; color: var(--color-text-light); display: flex; gap: 18px; }
.news-item .body .meta i { color: var(--color-gold); margin-right: 4px; }

/* 新闻详情 */
.article { max-width: 860px; margin: 0 auto; background: var(--color-white); border-radius: 12px; box-shadow: var(--shadow-soft); padding: 52px 60px; }
.article h1 { font-size: 30px; font-weight: 900; line-height: 1.5; }
.article .art-meta { display: flex; gap: 22px; margin: 18px 0 30px; padding-bottom: 24px; border-bottom: 1px solid var(--color-line); color: var(--color-text-light); font-size: 13px; flex-wrap: wrap; }
.article .art-meta i { color: var(--color-gold); margin-right: 5px; }
.article .art-cover { border-radius: 8px; overflow: hidden; margin-bottom: 32px; }
.article .art-content { font-size: 15px; line-height: 2.15; color: var(--color-text); }
.article .art-content h2 { font-size: 22px; margin: 30px 0 14px; }
.article .art-content h3 { font-size: 18px; margin: 24px 0 12px; }
.article .art-content p { margin-bottom: 16px; }
.article .art-content img { border-radius: 8px; margin: 20px auto; }
.article .art-content strong { color: var(--color-dark); }
.art-pager { display: flex; justify-content: space-between; gap: 20px; margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--color-line); }
.art-pager a { flex: 1; background: var(--color-bg); border-radius: 6px; padding: 16px 20px; font-size: 13.5px; transition: all 0.35s var(--ease-3d); }
.art-pager a:hover { background: var(--color-dark); color: #fff; transform: translateY(-3px); }
.art-pager a small { display: block; font-size: 11px; color: var(--color-gold-dark); letter-spacing: 2px; margin-bottom: 6px; }
.art-pager a.next { text-align: right; }

/* ---------- 21. 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 22px; }
.contact-card {
  display: flex; gap: 18px; align-items: flex-start;
  background: var(--color-white); border-radius: var(--radius-card);
  padding: 26px 28px; box-shadow: var(--shadow-soft);
  transition: transform 0.5s var(--ease-3d), box-shadow 0.4s;
}
.contact-card:hover { transform: perspective(1000px) translateZ(24px); box-shadow: var(--shadow-card); }
.contact-card .icon {
  flex: 0 0 52px; height: 52px; border-radius: 12px;
  background: linear-gradient(135deg, var(--color-dark), var(--color-dark-3));
  color: var(--color-gold); font-size: 20px;
  display: flex; align-items: center; justify-content: center;
}
.contact-card b { display: block; color: var(--color-dark); font-size: 15px; margin-bottom: 4px; }
.contact-card p { font-size: 13.5px; color: var(--color-text-light); }
.contact-card .wechat-qr { width: 96px; height: 96px; border-radius: 6px; border: 1px solid var(--color-line); margin-left: auto; }

.contact-form-wrap { background: var(--color-white); border-radius: 12px; box-shadow: var(--shadow-card); padding: 44px 48px; position: relative; overflow: hidden; }
.contact-form-wrap::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold-dark)); }
.contact-form-wrap h2 { font-size: 24px; font-weight: 900; margin-bottom: 8px; }
.contact-form-wrap .tip { color: var(--color-text-light); font-size: 13px; margin-bottom: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; color: var(--color-dark); font-weight: 500; margin-bottom: 8px; letter-spacing: 1px; }
.form-group label i { color: var(--color-gold-dark); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; border: 1.5px solid var(--color-line); border-radius: 6px;
  padding: 12px 16px; background: var(--color-bg);
  transition: all 0.35s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--color-gold); background: #fff; box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.12);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-submit { width: 100%; margin-top: 8px; }
.form-msg { display: none; margin-top: 16px; padding: 13px 18px; border-radius: 6px; font-size: 13.5px; }
.form-msg.success { display: block; background: rgba(58, 156, 93, 0.1); color: #2e7d4f; border: 1px solid rgba(58, 156, 93, 0.3); }
.form-msg.error { display: block; background: rgba(200, 70, 60, 0.1); color: #b13b31; border: 1px solid rgba(200, 70, 60, 0.3); }

.map-wrap { border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-soft); position: relative; min-height: 340px; background: var(--color-dark); }
.map-wrap iframe { width: 100%; height: 340px; border: 0; display: block; filter: grayscale(0.3) contrast(1.05); }
.map-placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.55); gap: 12px; font-size: 14px; letter-spacing: 2px; }
.map-placeholder i { font-size: 40px; color: var(--color-gold); }

/* ---------- 22. 页面加载动画 ---------- */
.page-loader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--color-dark); display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 18px;
  transition: opacity 0.6s ease, visibility 0s linear 0.6s;
}
.page-loader.hide { opacity: 0; visibility: hidden; }
.page-loader .ring {
  width: 52px; height: 52px; border-radius: 50%;
  border: 3px solid rgba(201, 169, 110, 0.2); border-top-color: var(--color-gold);
  animation: spin 0.9s linear infinite;
}
.page-loader span { color: rgba(255, 255, 255, 0.6); font-size: 12px; letter-spacing: 5px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 23. 响应式 ---------- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-masonry { columns: 2; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .service-list-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-track { grid-template-columns: repeat(3, 1fr); row-gap: 40px; }
  .process-track::before { display: none; }
  .about-intro { grid-template-columns: 1fr; gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; }
  .service-flow { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { left: 12px; }
  .tl-item, .tl-item:nth-child(even) { width: 100%; left: 0; padding: 0 0 40px 44px; }
  .tl-item .tl-dot, .tl-item:nth-child(even) .tl-dot { left: 3px; right: auto; }
  .tl-item:nth-child(even) .tl-card { border-left: 3px solid var(--color-gold); border-right: none; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-menu {
    position: fixed; top: 0; right: -100%; width: 78%; max-width: 340px; height: 100vh;
    background: rgba(20, 20, 36, 0.98); flex-direction: column; justify-content: center; gap: 26px;
    padding: 40px; transition: right 0.5s var(--ease-3d);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.4);
  }
  .nav-menu.open { right: 0; }
  .nav-menu a { font-size: 17px; }
  .nav-toggle { display: flex; }
  .nav-phone { display: none; }
  .banner-arrow { display: none; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-masonry { columns: 1; }
  .team-grid { grid-template-columns: 1fr; }
  .service-list-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; }
  .article { padding: 30px 24px; }
  .modal-box { padding: 0; }
  .modal-gallery, .modal-body { padding-left: 24px; padding-right: 24px; }
  .modal-body .spec { grid-template-columns: repeat(2, 1fr); }
  .contact-form-wrap { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .process-track { grid-template-columns: 1fr 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .service-flow { grid-template-columns: 1fr; }
  .page-hero { padding: 150px 0 70px; }
}
@media (max-width: 480px) {
  .process-track { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}