/* =========================================================
   四川崛地而起建筑工程有限公司 - 官网样式表
   主色: #064E55  辅色: #0a7a85  点缀: #e8a800
   ========================================================= */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #064E55;
  --primary-light: #0a7a85;
  --primary-dark: #032e33;
  --accent: #e8a800;
  --accent-light: #ffc840;
  --gray-light: #B7B6B6;
  --text: #1a1a2e;
  --text-soft: #4a4a5e;
  --text-light: #7a7a8a;
  --bg-light: #f6f8f9;
  --bg-subtle: #eef1f3;
  --white: #ffffff;
  --border: #e8eaed;
  --shadow-sm: 0 1px 3px rgba(6,78,85,0.06);
  --shadow: 0 4px 24px rgba(6,78,85,0.08);
  --shadow-md: 0 8px 32px rgba(6,78,85,0.10);
  --shadow-lg: 0 16px 48px rgba(6,78,85,0.14);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --nav-height: 92px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.75;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

.section-pad { padding: 100px 0; }
.bg-light { background: var(--bg-light); }

/* ---------- 导航栏 ---------- */
#navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(6,78,85,0.08);
  height: var(--nav-height);
  transition: var(--transition);
}
#navbar.scrolled {
  box-shadow: 0 4px 30px rgba(6,78,85,0.15);
  top: 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.logo-link { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 72px; width: auto; transition: var(--transition); }
.logo-img:hover { transform: scale(1.03); }

.main-nav ul { display: flex; align-items: center; gap: 2px; }
.main-nav a.nav-link {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 18px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; color: var(--text);
  transition: var(--transition); position: relative;
}
.main-nav a.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px; background: var(--primary);
  border-radius: 1px; transition: width 0.3s ease;
}
.main-nav a.nav-link:hover { color: var(--primary); }
.main-nav a.nav-link.active { color: var(--primary); font-weight: 600; }
.main-nav a.nav-link.active::after { width: 20px; }
.main-nav a.nav-link i { font-size: 10px; transition: var(--transition); }

/* 下拉菜单 */
.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; top: calc(100% + 12px); left: 0;
  background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
  border-radius: var(--radius); min-width: 200px;
  opacity: 0; visibility: hidden; transform: translateY(-10px) scale(0.97);
  transition: var(--transition); padding: 8px;
  border: 1px solid var(--border);
  box-shadow: 0 16px 48px rgba(6,78,85,0.12);
}
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.dropdown:hover > a.nav-link i { transform: rotate(180deg); }
.dropdown-menu li a {
  display: block; padding: 10px 16px; font-size: 14px; border-radius: var(--radius-xs);
  color: var(--text-soft); transition: var(--transition);
}
.dropdown-menu li a:hover { color: var(--primary); background: rgba(6,78,85,0.05); }

/* 汉堡菜单 */
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 10px; border-radius: var(--radius-sm);
}
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--primary); border-radius: 2px; transition: var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero Section ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; color: var(--white);
}
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, #022125 0%, #064E55 30%, #0a7a85 60%, #0d909e 100%);
  background-size: 400% 400%;
  animation: heroGradientFlow 14s ease infinite;
}
@keyframes heroGradientFlow {
  0%, 100% { background-position: 0% 50%; }
  25% { background-position: 100% 0%; }
  50% { background-position: 100% 100%; }
  75% { background-position: 0% 100%; }
}
.hero-bg::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 70% at 15% 30%, rgba(232,168,0,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 70% 80%, rgba(6,78,85,0.4) 0%, transparent 60%),
    repeating-linear-gradient(0deg, transparent, transparent 80px, rgba(13,144,158,0.04) 80px, rgba(13,144,158,0.04) 81px),
    repeating-linear-gradient(90deg, transparent, transparent 80px, rgba(13,144,158,0.04) 80px, rgba(13,144,158,0.04) 81px);
  animation: gridPulse 8s ease-in-out infinite alternate;
}
@keyframes gridPulse {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(2,33,37,0.12) 0%, rgba(3,46,51,0.25) 50%, rgba(2,33,37,0.4) 100%); z-index: 0; }

/* ---------- 电网线路动画 ---------- */
.hero-power-lines { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 1; }
.power-line { position: absolute; }
/* 水平线路 */
.pl-h {
  height: 2px;
  left: -10%; right: -10%;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(232,168,0,0.08) 10%,
    rgba(232,168,0,0.25) 30%,
    rgba(232,168,0,0.35) 50%,
    rgba(232,168,0,0.25) 70%,
    rgba(232,168,0,0.08) 90%,
    transparent 100%);
  animation: powerFlowH 8s linear infinite;
}
.pl-h::after {
  content: ''; position: absolute;
  width: 60px; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(232,168,0,0.7), transparent);
  animation: sparkTravel 2.5s linear infinite;
}
.pl-h--2 { top: 28%; animation-duration: 12s; animation-direction: reverse; opacity: 0.6; }
.pl-h--2::after { animation-duration: 3.2s; animation-delay: 1s; }
.pl-h--3 { top: 72%; animation-duration: 10s; opacity: 0.5; }
.pl-h--3::after { animation-duration: 2.8s; animation-delay: 2s; }

@keyframes powerFlowH {
  0% { transform: translateX(-5%); }
  100% { transform: translateX(5%); }
}
@keyframes sparkTravel {
  0% { left: -60px; opacity: 0; }
  5% { opacity: 1; }
  10% { opacity: 0; }
  15% { opacity: 1; }
  20% { opacity: 0; }
  100% { left: 100%; opacity: 0; }
}

/* 竖直线路 */
.pl-v {
  width: 2px;
  top: -10%; bottom: -10%;
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(232,168,0,0.07) 15%,
    rgba(232,168,0,0.2) 50%,
    rgba(232,168,0,0.07) 85%,
    transparent 100%);
  animation: powerFlowV 9s linear infinite;
}
.pl-v::after {
  content: ''; position: absolute; left: 0;
  width: 2px; height: 50px;
  background: linear-gradient(180deg, transparent, rgba(232,168,0,0.6), transparent);
  animation: sparkTravelV 3s linear infinite;
}
.pl-v--2 { left: 22%; animation-duration: 13s; opacity: 0.5; }
.pl-v--2::after { animation-duration: 3.5s; animation-delay: 1.5s; }
.pl-v--3 { left: 58%; animation-duration: 11s; opacity: 0.6; }
.pl-v--3::after { animation-duration: 2.7s; animation-delay: 0.8s; }
.pl-v--4 { left: 82%; animation-duration: 15s; opacity: 0.45; }
.pl-v--4::after { animation-duration: 3.8s; animation-delay: 2.2s; }

@keyframes powerFlowV {
  0% { transform: translateY(-5%); }
  100% { transform: translateY(5%); }
}
@keyframes sparkTravelV {
  0% { top: -50px; opacity: 0; }
  5% { opacity: 1; }
  10% { opacity: 0; }
  15% { opacity: 1; }
  20% { opacity: 0; }
  100% { top: 100%; opacity: 0; }
}

/* ---------- 光晕球 ---------- */
.hero-glow {
  position: absolute; border-radius: 50%; pointer-events: none;
  filter: blur(60px); z-index: 1;
  animation: glowFloat 10s ease-in-out infinite;
}
.hero-glow--1 {
  width: 500px; height: 500px; top: -150px; left: -150px;
  background: radial-gradient(circle, rgba(232,168,0,0.1), transparent 70%);
  animation-duration: 12s;
}
.hero-glow--2 {
  width: 400px; height: 400px; bottom: -100px; right: -100px;
  background: radial-gradient(circle, rgba(13,144,158,0.15), transparent 70%);
  animation-duration: 14s; animation-delay: 3s;
}
.hero-glow--3 {
  width: 350px; height: 350px; top: 40%; left: 50%;
  background: radial-gradient(circle, rgba(232,168,0,0.07), transparent 70%);
  animation-duration: 11s; animation-delay: 5s;
}
@keyframes glowFloat {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  25% { transform: translate(30px, -20px) scale(1.1); opacity: 0.8; }
  50% { transform: translate(-20px, 30px) scale(0.9); opacity: 0.5; }
  75% { transform: translate(-30px, -10px) scale(1.05); opacity: 0.7; }
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; z-index: 2; }

.hero-content {
  position: relative; z-index: 3;
  text-align: center; padding: 100px 24px 80px;
  max-width: 900px; margin: 0 auto;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(232,168,0,0.12); border: 1px solid rgba(232,168,0,0.35);
  color: var(--accent-light); padding: 8px 24px; border-radius: 50px;
  font-size: 13px; letter-spacing: 3px; margin-bottom: 28px;
  backdrop-filter: blur(8px);
}
.hero-title {
  font-size: clamp(2.2rem, 5.5vw, 4rem); font-weight: 800;
  line-height: 1.15; margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.hero-subtitle {
  font-size: clamp(1.02rem, 2vw, 1.28rem);
  color: rgba(255,255,255,0.82); margin-bottom: 52px;
  letter-spacing: 2px; font-weight: 300;
}
.hero-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 40px; margin-bottom: 52px; flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num { font-size: 2.8rem; font-weight: 800; color: var(--accent); letter-spacing: -0.02em; }
.stat-unit { font-size: 1.2rem; color: var(--accent-light); font-weight: 600; }
.stat-label { display: block; font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 6px; font-weight: 400; letter-spacing: 1px; }
.stat-divider { width: 1px; height: 56px; background: linear-gradient(180deg, transparent, rgba(255,255,255,0.2), transparent); }

.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.hero-scroll-hint {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%); text-align: center;
  color: rgba(255,255,255,0.45); font-size: 12px; z-index: 2;
  letter-spacing: 1px;
}
.hero-scroll-hint span { display: block; margin-bottom: 8px; }
.bounce { animation: bounce 2s infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)}50%{transform:translateY(8px)} }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 36px; border-radius: 50px; font-size: 15px;
  font-weight: 600; transition: var(--transition); cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #d49400 100%);
  color: #1a1a00;
  box-shadow: 0 4px 20px rgba(232,168,0,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(232,168,0,0.5); }
.btn-outline {
  background: transparent; color: var(--white);
  border: 2px solid rgba(255,255,255,0.55);
}
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: var(--white); transform: translateY(-2px); }
.btn-full { width: 100%; justify-content: center; }

/* ---------- 优势亮点 ---------- */
.highlights {
  padding: 80px 0 80px;
  position: relative; z-index: 3;
  background: var(--bg-light);
}
.highlight-grid {
  display: grid; grid-template-columns: repeat(4,1fr);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.highlight-card {
  padding: 40px 34px; text-align: center; color: var(--white);
  transition: var(--transition);
  position: relative;
}
.highlight-card:nth-child(1) { background: linear-gradient(180deg, var(--primary-dark) 0%, #043a40 100%); }
.highlight-card:nth-child(2) { background: linear-gradient(180deg, #043d43 0%, #06484f 100%); }
.highlight-card:nth-child(3) { background: linear-gradient(180deg, #06484f 0%, #075d65 100%); }
.highlight-card:nth-child(4) { background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%); }
.highlight-card::after {
  content: '';
  position: absolute;
  top: 12px; right: 12px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(232,168,0,0.04);
  pointer-events: none;
  transition: var(--transition);
}
.highlight-card:hover { transform: translateY(-6px); z-index: 2; }
.highlight-card:hover::after { background: rgba(232,168,0,0.10); transform: scale(1.5); }
.hc-icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(232,168,0,0.10); border: 1px solid rgba(232,168,0,0.22);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 22px; font-size: 26px; color: var(--accent-light);
  transition: var(--transition);
}
.highlight-card:hover .hc-icon { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); transform: scale(1.08); }
.highlight-card h3 { font-size: 18px; margin-bottom: 10px; font-weight: 700; letter-spacing: 0.5px; }
.highlight-card p { font-size: 13.5px; color: rgba(255,255,255,0.68); line-height: 1.75; max-width: 200px; margin: 0 auto; }

/* ---------- Section Header ---------- */
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block; background: rgba(6,78,85,0.07);
  color: var(--primary); padding: 6px 20px; border-radius: 50px;
  font-size: 13px; letter-spacing: 2px; margin-bottom: 20px; font-weight: 500;
  border: 1px solid rgba(6,78,85,0.12);
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem); color: var(--primary-dark);
  font-weight: 800;
}
.section-line {
  width: 56px; height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 2px; margin: 22px auto 0;
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 72px; align-items: center;
}
/* 左侧：数据卡片 */
.about-stat-row {
  display: flex; align-items: center; gap: 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 24px 12px; margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}
.about-stat-item {
  flex: 1; text-align: center; color: var(--white); padding: 0 8px;
}
.about-stat-num {
  display: block; font-size: 26px; font-weight: 800; color: var(--accent); letter-spacing: -0.5px;
}
.about-stat-label {
  display: block; font-size: 12px; color: rgba(255,255,255,0.65); margin-top: 2px; letter-spacing: 0.5px;
}
.about-stat-divider {
  width: 1px; height: 32px; background: rgba(255,255,255,0.12); flex-shrink: 0;
}
/* 左侧：文本 */
.about-lead {
  font-size: 17px; color: var(--primary); font-weight: 600; margin-bottom: 20px; line-height: 1.8;
  padding-left: 16px; border-left: 3px solid var(--accent);
}
.about-text p {
  color: var(--text-soft); margin-bottom: 16px; font-size: 14.5px; line-height: 1.85;
}
.about-text p:last-of-type { margin-bottom: 0; }
.about-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.tag {
  padding: 7px 16px; background: rgba(232,168,0,0.08);
  color: var(--primary-dark); border-radius: 50px; font-size: 13px; font-weight: 600;
  border: 1px solid rgba(232,168,0,0.18); transition: var(--transition);
  letter-spacing: 0.3px;
}
.tag:hover {
  background: var(--accent); color: var(--primary-dark);
  border-color: var(--accent); transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232,168,0,0.25);
}
/* 右侧：视觉卡片 */
.about-visual { position: relative; }
.about-img-card {
  background: linear-gradient(155deg, #053539 0%, var(--primary) 50%, #075d65 100%);
  border-radius: var(--radius); padding: 48px 40px; color: var(--white);
  box-shadow: 0 8px 32px rgba(6,78,85,0.18); position: relative; z-index: 1;
  overflow: hidden;
}
.about-img-card::before {
  content: ''; position: absolute; top: -60px; right: -60px;
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(232,168,0,0.18), transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.acard-glow {
  position: absolute; bottom: -40px; left: -40px;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(232,168,0,0.10), transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.acard-inner { position: relative; z-index: 1; }
.acard-icon-wrap {
  width: 72px; height: 72px; border-radius: 50%;
  background: rgba(232,168,0,0.12); border: 2px solid rgba(232,168,0,0.30);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 28px; font-size: 30px; color: var(--accent);
  transition: var(--transition);
}
.about-img-card:hover .acard-icon-wrap {
  background: var(--accent); color: #06484f;
  box-shadow: 0 4px 20px rgba(232,168,0,0.35);
  transform: translateY(-3px);
}
.acard-inner h3 {
  font-size: 22px; margin-bottom: 26px; font-weight: 700;
  text-align: center; width: 100%;
}
.acard-list { display: flex; flex-direction: column; gap: 2px; }
.acard-list li {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 8px;
  font-size: 14px; line-height: 1.5; color: rgba(255,255,255,0.82);
  transition: var(--transition);
}
.acard-list li:hover {
  background: rgba(255,255,255,0.06);
  transform: translateX(4px);
}
.acard-list li i { color: var(--accent); font-size: 16px; flex-shrink: 0; }
/* 装饰元素 */
.about-deco-dots {
  position: absolute; bottom: -20px; right: -20px;
  width: 100px; height: 100px;
  background: radial-gradient(circle, var(--accent) 1.8px, transparent 1.8px);
  background-size: 14px 14px; opacity: 0.2; z-index: 0;
}
.about-deco-ring {
  position: absolute; top: -28px; left: -16px;
  width: 80px; height: 80px;
  border: 3px dashed rgba(232,168,0,0.15);
  border-radius: 50%; z-index: 0;
}

/* ---------- 业务范围 ---------- */
.services-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 28px;
}
.service-card {
  background: var(--white); border-radius: var(--radius);
  padding: 40px 32px; box-shadow: var(--shadow); border: 1px solid var(--border);
  transition: var(--transition); position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0); transform-origin: left; transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.sc-icon {
  width: 76px; height: 76px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(6,78,85,0.06), rgba(6,78,85,0.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; color: var(--primary); margin-bottom: 28px;
  transition: var(--transition);
}
.service-card:hover .sc-icon { background: var(--primary); color: var(--white); transform: scale(1.05); }
.service-card h3 { font-size: 19px; margin-bottom: 12px; color: var(--primary-dark); font-weight: 700; }
.service-card p { font-size: 14px; color: var(--text-light); line-height: 1.75; }

/* ---------- 工程案例 ---------- */
.cases-filter {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-bottom: 52px;
}
.filter-btn {
  padding: 10px 28px; border-radius: 50px; font-size: 14px; font-weight: 500;
  border: 1.5px solid var(--border); color: var(--text-soft);
  background: var(--white); transition: var(--transition);
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active {
  background: var(--primary); color: var(--white); border-color: var(--primary);
}
.cases-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 28px;
}
.case-card {
  background: var(--white); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border);
  transition: var(--transition);
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.case-thumb {
  height: 200px; overflow: hidden; position: relative;
  background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 100%);
  display: flex; align-items: center; justify-content: center;
}
.case-thumb::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(3,46,51,0.3) 100%);
}
.case-thumb .case-icon { font-size: 64px; color: rgba(255,255,255,0.2); position: relative; z-index: 1; }
.case-category {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  background: rgba(232,168,0,0.9); color: #3d2e00;
  padding: 5px 14px; border-radius: 50px; font-size: 12px; font-weight: 700;
  backdrop-filter: blur(4px);
}
.case-body { padding: 24px; }
.case-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--primary-dark); }
.case-body p { font-size: 13px; color: var(--text-light); line-height: 1.65; }
.case-meta {
  display: flex; gap: 20px; margin-top: 18px; padding-top: 16px;
  border-top: 1px solid var(--bg-subtle);
  font-size: 12px; color: var(--text-light);
}
.case-meta span { display: flex; align-items: center; gap: 5px; }
.case-meta i { color: var(--primary-light); font-size: 13px; }

/* ---------- 资质荣誉 ---------- */
.honors-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 24px;
}
.honor-card {
  background: var(--white); border-radius: var(--radius);
  padding: 32px 24px; text-align: center; box-shadow: var(--shadow);
  transition: var(--transition); border: 1px solid transparent;
}
.honor-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(6,78,85,0.15); }
.honor-icon { font-size: 36px; color: var(--accent); margin-bottom: 16px; }
.honor-card h4 { font-size: 15px; font-weight: 600; color: var(--primary-dark); margin-bottom: 8px; }
.honor-card p { font-size: 13px; color: var(--text-light); }

/* ---------- 数字统计 ---------- */
.counter-section {
  background: linear-gradient(160deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  padding: 88px 0; color: var(--white); position: relative; overflow: hidden;
}
.counter-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(232,168,0,0.08), transparent 50%),
              radial-gradient(ellipse at 80% 50%, rgba(10,122,133,0.3), transparent 50%);
  pointer-events: none;
}
.counter-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; position: relative; z-index: 1; }
.counter-item { text-align: center; padding: 40px 20px; }
.counter-icon { font-size: 36px; color: var(--accent); margin-bottom: 20px; opacity: 0.9; }
.counter-num { font-size: 3.2rem; font-weight: 800; color: var(--white); }
.counter-unit { font-size: 1.3rem; color: var(--accent-light); margin-left: 4px; font-weight: 600; }
.counter-label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 10px; letter-spacing: 1px; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; }
.cinfo-item { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 28px; }
.cinfo-icon {
  width: 56px; height: 56px; border-radius: var(--radius-sm);
  background: rgba(6,78,85,0.06); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; flex-shrink: 0; transition: var(--transition);
  border: 1px solid rgba(6,78,85,0.08);
}
.cinfo-item:hover .cinfo-icon { background: var(--primary); color: var(--white); border-color: var(--primary); }
.cinfo-item h4 { font-size: 13px; color: var(--text-light); margin-bottom: 4px; }
.cinfo-item p { font-size: 15px; color: var(--text); font-weight: 600; }
.map-container { margin-top: 24px; }
.map-address-card {
  display: flex; align-items: flex-start; gap: 20px;
  padding: 28px; background: var(--bg-light); border-radius: var(--radius);
  border: 1px solid var(--border);
}
.map-address-card > i {
  font-size: 40px; color: var(--primary); margin-top: 4px; opacity: 0.7;
}
.map-address-text h4 { font-size: 15px; color: var(--text); margin-bottom: 8px; font-weight: 700; }
.map-address-text p { font-size: 15px; color: var(--text-soft); line-height: 1.7; }
.map-address-text .map-addr-detail { font-size: 14px; color: var(--text-light); }
.map-nav-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px; padding: 8px 20px;
  background: var(--primary); color: var(--white);
  border-radius: 50px; font-size: 13px; font-weight: 500;
  transition: var(--transition);
}
.map-nav-link:hover { background: var(--primary-light); transform: translateY(-1px); }

/* ---------- 联系表单 ---------- */
.contact-form-wrap {
  background: var(--white); border-radius: var(--radius);
  padding: 44px; box-shadow: var(--shadow-md); border: 1px solid var(--border);
}
.contact-form h3 { font-size: 24px; color: var(--primary-dark); margin-bottom: 32px; font-weight: 800; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-size: 14px; color: var(--text-soft); margin-bottom: 8px; font-weight: 600; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 13px 18px; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); font-size: 14px; font-family: inherit;
  background: var(--bg-light); color: var(--text); transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary); background: var(--white);
  box-shadow: 0 0 0 4px rgba(6,78,85,0.06);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-result { margin-top: 18px; padding: 14px 18px; border-radius: var(--radius-sm); display: none; font-size: 14px; font-weight: 500; }
.form-result.success { background: #e8f5e9; color: #2e7d32; display: block; border: 1px solid #a5d6a7; }
.form-result.error { background: #ffebee; color: #c62828; display: block; border: 1px solid #ef9a9a; }

/* ---------- 页脚 ---------- */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.78); padding: 72px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr 1.5fr; gap: 64px; padding-bottom: 52px; }
.footer-brand p { font-size: 14px; margin-top: 4px; }
.footer-slogan { color: rgba(255,255,255,0.5); font-size: 13px; margin-top: 8px !important; }
.footer-logo { height: 48px; width: auto; margin-bottom: 12px; }
.footer-links h4, .footer-contact h4 { font-size: 15px; color: var(--white); margin-bottom: 24px; font-weight: 700; }
.footer-links ul li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.58); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 6px; }
.footer-contact p { font-size: 14px; margin-bottom: 14px; display: flex; align-items: flex-start; gap: 12px; color: rgba(255,255,255,0.65); }
.footer-contact i { color: var(--accent); margin-top: 3px; font-size: 15px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08); padding: 22px 0;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.35); text-align: center; }
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; bottom: 36px; right: 36px; z-index: 999;
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--primary); color: var(--white);
  box-shadow: 0 6px 24px rgba(6,78,85,0.35);
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; opacity: 0; visibility: hidden; transform: translateY(16px);
  transition: var(--transition);
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 8px 32px rgba(232,168,0,0.4); }

/* ---------- AOS 动画 ---------- */
[data-aos] { opacity: 0; transform: translateY(36px); transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1); }
[data-aos].aos-animate { opacity: 1; transform: translateY(0); }
[data-aos="fade-right"] { transform: translateX(-36px); }
[data-aos="fade-right"].aos-animate { transform: translateX(0); }
[data-aos="fade-left"] { transform: translateX(36px); }
[data-aos="fade-left"].aos-animate { transform: translateX(0); }
[data-aos="fade-down"] { transform: translateY(-24px); }
[data-aos="fade-down"].aos-animate { transform: translateY(0); }
[data-aos="zoom-in"] { transform: scale(0.88); }
[data-aos="zoom-in"].aos-animate { transform: scale(1); }
[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos-delay="400"] { transition-delay: 0.4s; }

/* ---------- 粒子动画 ---------- */
.particle {
  position: absolute;
  background: rgba(255,255,255,0.12);
  animation: floatUp linear infinite;
}
.particle.circle { border-radius: 50%; }
.particle.diamond {
  border-radius: 2px;
  animation-name: floatUpDiamond;
}
.particle.gold { background: rgba(232,168,0,0.15); }
@keyframes floatUp {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  8%   { opacity: 1; }
  85%  { opacity: 0.3; }
  100% { transform: translateY(-120px) scale(1); opacity: 0; }
}
@keyframes floatUpDiamond {
  0%   { transform: translateY(100vh) scale(0) rotate(0deg); opacity: 0; }
  8%   { opacity: 1; }
  85%  { opacity: 0.3; }
  100% { transform: translateY(-120px) scale(1) rotate(180deg); opacity: 0; }
}

/* ---------- 隐藏过滤 ---------- */
.case-card.hidden { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .services-grid, .cases-grid { grid-template-columns: repeat(2,1fr); }
  .honors-grid { grid-template-columns: repeat(2,1fr); }
  .counter-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }
  .about-grid { grid-template-columns: 1fr; gap: 52px; }
  .about-img-card { padding: 40px 36px; }
  .about-deco-ring { display: none; }
  .about-deco-dots { bottom: -12px; right: -12px; width: 72px; height: 72px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1/-1; }
  .highlight-grid { grid-template-columns: repeat(2,1fr); border-radius: var(--radius-sm); }
  .highlight-card { padding: 36px 28px; }
}

@media (max-width: 768px) {
  /* top-bar 已移除 */
  .main-nav { display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; bottom: 0; background: var(--white); padding: 28px; overflow-y: auto; flex-direction: column; z-index: 999; }
  .main-nav.open { display: flex; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav a.nav-link { padding: 16px 0; border-bottom: 1px solid var(--bg-subtle); border-radius: 0; font-size: 16px; }
  .main-nav a.nav-link::after { display: none; }
  .dropdown-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; padding: 0 0 0 20px; border: none; }
  .menu-toggle { display: flex; }
  .highlight-grid { grid-template-columns: repeat(2,1fr); border-radius: var(--radius-sm); }
  .highlight-card { padding: 36px 28px; }
  .services-grid, .cases-grid { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: repeat(2,1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-stats { gap: 24px; }
  .stat-divider { height: 40px; }
  .counter-grid { grid-template-columns: repeat(2,1fr); }
  .section-pad { padding: 64px 0; }
}

@media (max-width: 480px) {
  .highlight-grid { grid-template-columns: 1fr; border-radius: var(--radius-sm); }
  .highlight-card { padding: 32px 24px; }
  .highlights { padding: 52px 0 52px; }
  .honors-grid { grid-template-columns: 1fr; }
  .counter-grid { grid-template-columns: repeat(2,1fr); gap: 8px; }
  .counter-item { padding: 28px 12px; }
  .counter-num { font-size: 2.4rem; }
  .hero-btns { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .hero-content { padding: 80px 20px 60px; }
  .about-stat-row { padding: 20px 6px; }
  .about-stat-num { font-size: 22px; }
  .about-stat-label { font-size: 11px; }
  .about-img-card { padding: 32px 24px; }
  .acard-list li { font-size: 13px; }
}