/* ============================================
   O'DESIGN 欧点空间艺术设计
   配色: 主色 #003E36 墨绿 / 点缀 #FFAA33 暖金 / 黑白灰
   ============================================ */
:root {
  --primary: #003E36;
  --primary-dark: #002922;
  --accent: #FFAA33;
  --accent-light: #FFBB55;
  --black: #1a1a1a;
  --white: #ffffff;
  --gray-50: #f7f7f7;
  --gray-100: #eeeeee;
  --gray-300: #cccccc;
  --gray-500: #999999;
  --gray-700: #666666;
  --gray-900: #333333;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 62, 54, 0.15);
  --radius: 12px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ============ 导航 ============ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--primary);
  transition: background 0.3s, box-shadow 0.3s;
}
.site-header.scrolled {
  background: rgba(0, 62, 54, 0.97);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { color: var(--accent); font-size: 22px; line-height: 1; }
.logo-text {
  color: var(--white); font-size: 20px; font-weight: 700; letter-spacing: 2px;
}
.logo-en { font-size: 12px; font-weight: 400; color: var(--gray-300); letter-spacing: 1px; margin-left: 8px; }

.main-nav ul { display: flex; gap: 32px; }
.main-nav a {
  color: var(--gray-300); font-size: 15px; font-weight: 500;
  padding: 6px 0; border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.main-nav a:hover, .main-nav a.active { color: var(--white); border-bottom-color: var(--accent); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--white);
  margin: 5px 0; transition: 0.3s;
}

/* Logo 图片（白色logo，置于深绿导航上呈白色效果） */
.logo img.logo-img { height: 36px; width: auto; display: block; }

/* 语言切换 */
.lang-switch {
  color: var(--white); font-size: 12px; font-weight: 500;
  letter-spacing: 1px; padding: 5px 14px; white-space: nowrap;
  border: 1px solid rgba(255, 255, 255, 0.45); border-radius: 20px;
  margin-left: 12px; flex-shrink: 0; transition: all 0.25s;
}
.lang-switch:hover { border-color: var(--accent); color: var(--accent); }

/* ============ Hero ============ */
.hero {
  position: relative; min-height: 88vh;
  display: flex; align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #00564a 100%);
  color: var(--white);
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-slides { position: absolute; inset: 0; z-index: 0; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; transition: opacity 1.6s ease-in-out;
  will-change: opacity;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-slide-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-slide-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 60px 0 34px;
  background: linear-gradient(transparent, rgba(0, 30, 26, 0.72));
  text-align: center; z-index: 2;
}
.hero-slide-caption h2 {
  font-size: clamp(22px, 3.2vw, 40px); font-weight: 800;
  letter-spacing: 3px; color: #fff; margin-bottom: 8px;
}
.hero-slide-caption p {
  font-size: 15px; color: rgba(255,255,255,.85); letter-spacing: 1px;
}
.hero-dots {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 10px; z-index: 5;
}
.hero-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.35); cursor: pointer;
  transition: background .3s, transform .3s; border: none; padding: 0;
}
.hero-dot:hover { background: rgba(255,255,255,.7); }
.hero-dot.active { background: var(--accent); transform: scale(1.2); }
.hero::before {
  content: ''; position: absolute; right: -10%; top: 20%;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,170,51,0.12) 0%, transparent 70%);
}
.hero-content { position: relative; z-index: 2; }
.hero-suptitle {
  color: var(--accent); font-size: 14px; letter-spacing: 4px;
  margin-bottom: 20px; font-weight: 500;
}
.hero-title {
  font-size: clamp(48px, 7vw, 88px); font-weight: 900;
  line-height: 1.15; letter-spacing: 4px; margin-bottom: 24px;
}
.hero-desc { font-size: 18px; color: var(--gray-300); margin-bottom: 40px; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============ 按钮 ============ */
.btn {
  display: inline-block; padding: 14px 36px; font-size: 15px;
  font-weight: 600; border-radius: 6px; letter-spacing: 1px;
  transition: all 0.25s; cursor: pointer; border: 2px solid transparent;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: var(--primary-dark); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,170,51,0.35); }
.btn-outline { border-color: rgba(255,255,255,0.5); color: var(--white); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ============ Section 通用 ============ */
.section { padding: 90px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-number {
  display: inline-block; color: var(--accent); font-size: 13px;
  font-weight: 700; letter-spacing: 3px; margin-bottom: 10px;
}
.section-header h2 {
  font-size: 36px; color: var(--primary); font-weight: 800;
  letter-spacing: 2px; position: relative; display: inline-block; margin-bottom: 14px;
}
.section-header h2::after {
  content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%);
  width: 50px; height: 3px; background: var(--accent);
}
.section-subtitle { font-size: 14px; color: var(--gray-500); letter-spacing: 3px; }

/* ============ 关于 ============ */
.about-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px;
  align-items: start;
}
.about-intro {
  font-size: 18px; color: var(--primary); font-weight: 600; margin-bottom: 20px;
  line-height: 1.8;
}
.about-text p { margin-bottom: 16px; color: var(--gray-700); }
.about-text strong { color: var(--primary); }
.about-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 32px;
}
.stat {
  background: var(--gray-50); border-radius: var(--radius);
  padding: 24px 16px; text-align: center; border-left: 3px solid var(--accent);
}
.stat-number { display: block; font-size: 32px; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 13px; color: var(--gray-500); }

.about-locations { display: grid; gap: 20px; }
.location-card {
  background: var(--white); border: 1px solid var(--gray-100);
  border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); transition: transform 0.25s, box-shadow 0.25s;
}
.location-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.location-card h3 { color: var(--primary); font-size: 18px; margin-bottom: 10px; }
.location-card p { color: var(--gray-700); font-size: 14px; margin-bottom: 12px; }
.location-tag {
  display: inline-block; background: #FFF3E0; color: #B45309;
  font-size: 13px; padding: 4px 12px; border-radius: 20px; font-weight: 600;
}

/* ============ 团队介绍 ============ */
.team-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.team-card {
  background: var(--white); border: 1px solid var(--gray-100);
  border-radius: var(--radius); padding: 40px 28px 36px;
  text-align: center; box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
}
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.team-photo {
  width: 110px; height: 110px; margin: 0 auto 22px; border-radius: 50%;
  background: var(--gray-100); color: var(--gray-500);
  font-size: 40px; font-weight: 800; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  border: 3px solid var(--gray-300);
}
.team-photo-wrap {
  width: 110px; height: 110px; margin: 0 auto 22px;
  border-radius: 50%; overflow: hidden;
  border: 3px solid var(--gray-300);
}
.team-photo-img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.team-name { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.team-role {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 1px;
  color: #B45309; background: #FFF3E0; padding: 4px 16px;
  border-radius: 20px; margin-bottom: 14px;
}
.team-desc { font-size: 14px; color: var(--gray-700); line-height: 1.8; }

/* ============ 社会活动 ============ */
.activity-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.activity-card {
  background: var(--white); border: 1px solid var(--gray-100);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s;
}
.activity-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.activity-card .activity-img { width: 100%; height: 220px; object-fit: cover; }
.activity-body { padding: 26px 28px 30px; flex: 1; display: flex; flex-direction: column; }
.activity-tag {
  align-self: flex-start; font-size: 12px; font-weight: 700; letter-spacing: 2px;
  background: var(--primary); color: var(--white);
  padding: 5px 16px; border-radius: 20px; margin-bottom: 14px;
}
.activity-tag.tag-team { background: var(--accent); color: var(--primary-dark); }
.activity-tag.tag-learn { background: var(--primary); color: var(--white); }
.activity-tag.tag-tour { background: var(--black); color: var(--white); }
.activity-tag.tag-charity { background: var(--primary-dark); color: var(--accent); }
.activity-tag.tag-award { background: var(--accent); color: var(--primary-dark); }
.activity-date { font-size: 13px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 8px; }
.activity-card h3 { font-size: 19px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.activity-desc { font-size: 14px; color: var(--gray-700); line-height: 1.8; }

/* ============ 服务 ============ */
.services-section { background: var(--gray-50); }
.services-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px;
}
.service-card {
  background: var(--white); border-radius: var(--radius); padding: 36px 28px;
  box-shadow: var(--shadow); transition: all 0.25s; text-align: center;
  border-top: 3px solid transparent;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-top-color: var(--accent); }
.service-icon { font-size: 28px; color: var(--accent); margin-bottom: 16px; }
.service-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 12px; }
.service-card p { font-size: 14px; color: var(--gray-700); }

/* ============ 作品卡片 ============ */
.project-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 4/3; box-shadow: var(--shadow); transition: transform 0.3s;
  display: block; /* 卡片为链接 */
}
.project-card:hover { transform: translateY(-4px); }
.project-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.project-card:hover img { transform: scale(1.05); }
.project-info {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,41,34,0.92));
  padding: 48px 20px 18px; color: var(--white);
}
.project-info h3 { font-size: 16px; margin-bottom: 4px; }
.project-info p { font-size: 13px; color: var(--gray-300); }
.center-btn { text-align: center; margin-top: 44px; }

/* ============ FAQ ============ */
.faq-section { background: var(--gray-50); }
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item {
  background: var(--white); border-radius: var(--radius);
  padding: 0 32px; margin-bottom: 16px;
  box-shadow: var(--shadow); border-left: 4px solid var(--primary);
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: 0 4px 16px rgba(0,62,54,0.12); }
.faq-item summary {
  font-size: 17px; font-weight: 700; color: var(--primary);
  padding: 24px 0; cursor: pointer; list-style: none; position: relative;
  padding-right: 30px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; position: absolute; right: 0; top: 22px;
  color: var(--accent); font-size: 22px; font-weight: 700;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { font-size: 15px; line-height: 1.9; color: var(--gray-700); padding-bottom: 24px; }

/* ============ 咨询表单 ============ */
.inquiry-section { background: var(--white); }
.form-wrapper { max-width: 520px; margin: 0 auto; }
.form-input {
  width: 100%; padding: 14px 18px; border: 1px solid var(--gray-100);
  border-radius: 8px; font-size: 15px; transition: all 0.2s;
  outline: none; font-family: inherit; background: var(--gray-50);
}
.form-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,62,54,0.08); background: var(--white); }
.form-group { margin-bottom: 20px; }
.btn-submit { width: 100%; margin-top: 8px; }
.btn-submit:hover { background: var(--accent); color: var(--primary-dark); }
.form-hint { font-size: 13px; color: var(--gray-500); margin-top: 16px; text-align: center; }

/* ============ 联系我们 ============ */
.contact-section { background: var(--primary-dark); color: var(--white); }
.contact-section .section-header h2 { color: var(--white); }
.contact-section .section-subtitle { color: var(--gray-300); }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 24px; }
.contact-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius); padding: 32px; transition: border-color 0.2s;
}
.contact-card:hover { border-color: var(--accent); }
.contact-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 16px; color: var(--accent); }
.contact-card .company { font-size: 15px; color: var(--gray-300); margin-bottom: 20px; font-weight: 500; }
.contact-item { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 14px; }
.contact-item .icon { font-size: 18px; width: 24px; text-align: center; flex-shrink: 0; }
.contact-item .label { font-size: 13px; color: var(--gray-500); display: block; margin-bottom: 2px; }
.contact-item .value { font-size: 16px; color: var(--white); font-weight: 500; }

.ops-block { margin-top: 48px; }
.ops-title { text-align: center; font-size: 20px; font-weight: 700; color: var(--accent); margin-bottom: 24px; }
.ops-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.ops-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px; padding: 20px 24px; transition: all 0.2s;
}
.ops-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.ops-card h4 { font-size: 15px; font-weight: 600; color: var(--accent); margin-bottom: 8px; }
.ops-card p { font-size: 13px; color: var(--gray-300); margin: 0; line-height: 1.6; }

/* ============ 子页面 ============ */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 70%);
  color: var(--white); padding: 140px 0 60px; text-align: center;
}
.page-hero h1 { font-size: 40px; font-weight: 800; letter-spacing: 3px; margin-bottom: 10px; }
.page-hero p { color: var(--gray-300); font-size: 14px; letter-spacing: 3px; }

.gray-section { background: var(--gray-50); }
.about-text-full { max-width: 900px; margin: 0 auto 40px; }
.about-text-full p { margin-bottom: 16px; color: var(--gray-700); }
.about-stats-full { max-width: 900px; margin: 0 auto; grid-template-columns: repeat(3, 1fr); }

.light-card { background: var(--white); border: 1px solid var(--gray-100); box-shadow: var(--shadow); }
.light-card h3 { color: var(--primary); }
.light-card .company { color: var(--gray-500); }
.light-card .value { color: var(--gray-900); }
.light-card .label { color: var(--gray-500); }

/* 服务详情 */
.services-detail { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-detail-card {
  background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius);
  padding: 36px; box-shadow: var(--shadow); transition: transform 0.25s, box-shadow 0.25s;
}
.service-detail-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.service-detail-icon { font-size: 26px; color: var(--accent); margin-bottom: 14px; }
.service-detail-card h3 { font-size: 20px; color: var(--primary); margin-bottom: 12px; }
.service-detail-card p { font-size: 14px; color: var(--gray-700); margin-bottom: 16px; }
.service-detail-card ul { padding-left: 20px; }
.service-detail-card li { font-size: 14px; color: var(--gray-700); margin-bottom: 8px; list-style: disc; }

/* 合作流程 */
.process-steps {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; max-width: 1100px; margin: 0 auto 48px;
}
.process-step {
  background: var(--white); border-radius: var(--radius); padding: 24px 16px;
  text-align: center; box-shadow: var(--shadow); border-top: 3px solid var(--accent);
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--primary); color: var(--white); font-weight: 700; margin-bottom: 10px;
}
.process-step h4 { font-size: 15px; color: var(--primary); margin-bottom: 6px; }
.process-step p { font-size: 12px; color: var(--gray-500); }

/* 案例筛选（双级：区域 + 类型） */
.filter-group {
  display: flex; flex-direction: column; gap: 14px; margin-bottom: 44px;
}
.filter-row {
  display: flex; justify-content: center; align-items: center; gap: 10px; flex-wrap: wrap;
}
.filter-label {
  font-size: 13px; font-weight: 700; color: var(--gray-500);
  letter-spacing: 2px; margin-right: 8px; white-space: nowrap;
}
.filter-btn {
  padding: 10px 28px; border: 1px solid var(--gray-100); background: var(--white);
  border-radius: 30px; font-size: 14px; cursor: pointer; color: var(--gray-700);
  transition: all 0.25s; font-family: inherit;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* 区域按钮（与类型按钮样式区分：金色激活态） */
.filter-btn.region:hover { border-color: var(--accent); color: var(--primary); }
.filter-btn.region.active {
  background: var(--accent); color: var(--primary-dark); border-color: var(--accent);
}

.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.no-results {
  grid-column: 1 / -1; text-align: center; padding: 70px 20px;
  color: var(--gray-500); font-size: 15px; letter-spacing: 1px;
  background: var(--gray-50); border-radius: var(--radius);
}

/* 作品说明弹窗 */
.project-modal {
  position: fixed; inset: 0; z-index: 2000; display: none;
  align-items: center; justify-content: center;
  background: rgba(0, 0, 0, 0.72); padding: 24px;
}
.project-modal.open { display: flex; }
.project-modal-content {
  position: relative; background: var(--white); border-radius: var(--radius);
  max-width: 680px; width: 100%; max-height: 90vh; overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.project-modal-content .pm-img { width: 100%; max-height: 420px; object-fit: cover; }
.project-modal-body { padding: 30px 32px 34px; }
.project-modal-body .pm-title { font-size: 24px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.project-modal-body .pm-meta { font-size: 13px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 14px; }
.project-modal-body .pm-desc { font-size: 15px; color: var(--gray-700); line-height: 1.9; }
.project-modal-close {
  position: absolute; top: 14px; right: 14px; z-index: 3;
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(0, 0, 0, 0.55); color: var(--white);
  border: none; font-size: 22px; line-height: 1; cursor: pointer;
  transition: background 0.2s;
}
.project-modal-close:hover { background: var(--primary); }

@media (max-width: 900px) {
  .services-detail { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .page-hero { padding: 110px 0 44px; }
  .page-hero h1 { font-size: 30px; }
  .about-stats-full { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .activity-grid { grid-template-columns: 1fr; }
  .activity-card .activity-img { height: 180px; }
  .filter-label { display: none; }
}

/* ============ 页脚 ============ */
.footer { background: var(--black); color: var(--gray-300); padding: 56px 0 24px; }
.footer-content {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 32px; flex-wrap: wrap; margin-bottom: 40px;
}
.footer-logo { color: var(--white); font-size: 18px; font-weight: 700; letter-spacing: 2px; }
.footer-brand p { font-size: 13px; color: var(--gray-500); margin-top: 8px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-domains { font-size: 14px; }
.footer-domains a { color: var(--gray-300); transition: color 0.2s; }
.footer-domains a:hover { color: var(--accent); }
.footer-domains .sep { color: var(--gray-700); margin: 0 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px;
  text-align: center; font-size: 13px; color: var(--gray-700);
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-header h2 { font-size: 28px; }
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--primary); padding: 20px 24px;
    transform: translateY(-120%); transition: transform 0.3s;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  }
  .main-nav.active { transform: translateY(0); }
  .main-nav ul { flex-direction: column; gap: 16px; }
  .nav-toggle { display: block; }
  .featured-grid { grid-template-columns: 1fr; }
  .hero { min-height: 70vh; }
  .hero-title { letter-spacing: 2px; }
  .footer-content { flex-direction: column; gap: 24px; }
}

/* ============ 作品详情页 ============ */
/* 卡片区域角标（中国大陆/香港/海外） */
.project-region-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  padding: 4px 14px; border-radius: 20px;
  background: rgba(0, 62, 54, 0.85); color: var(--white);
  backdrop-filter: blur(2px);
}
.project-region-badge.region-china { background: rgba(0, 62, 54, 0.85); color: var(--white); }
.project-region-badge.region-hongkong { background: rgba(255, 170, 51, 0.92); color: var(--primary-dark); }
.project-region-badge.region-overseas { background: rgba(26, 26, 26, 0.82); color: var(--accent); }

/* 面包屑 */
.breadcrumb {
  display: flex; justify-content: center; align-items: center;
  gap: 10px; font-size: 13px; color: var(--gray-300); margin-bottom: 14px;
  letter-spacing: 1px;
}
.breadcrumb a { color: var(--gray-300); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .crumb-sep { color: var(--gray-500); }
.breadcrumb .crumb-current { color: var(--accent); }

.detail-hero { padding: 150px 0 56px; }

/* 画廊 */
.detail-gallery { margin-bottom: 44px; }
.detail-main {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: var(--gray-50); box-shadow: var(--shadow);
}
.detail-main-img {
  width: 100%; max-height: 620px; object-fit: cover;
  display: block; transition: opacity 0.25s;
}
.detail-nav {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 46px; height: 46px; border-radius: 50%;
  background: rgba(0, 62, 54, 0.72); color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.35); font-size: 28px; line-height: 1;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, transform 0.2s;
}
.detail-nav:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-50%) scale(1.06); }
.detail-prev { left: 14px; }
.detail-next { right: 14px; }

/* 缩略图 */
.detail-thumbs {
  display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap;
}
.detail-thumb {
  width: 96px; height: 72px; padding: 0; border: 2px solid var(--gray-100);
  border-radius: 8px; overflow: hidden; cursor: pointer; background: var(--gray-50);
  transition: border-color 0.2s, opacity 0.2s; opacity: 0.75;
}
.detail-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.detail-thumb:hover { opacity: 1; border-color: var(--gray-300); }
.detail-thumb.active { border-color: var(--accent); opacity: 1; }

/* 项目信息区 */
.detail-info {
  background: var(--gray-50); border-radius: var(--radius);
  padding: 36px 40px; margin-bottom: 56px;
}
.detail-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.detail-tag {
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  padding: 5px 16px; border-radius: 20px;
  background: var(--primary); color: var(--white);
}
.detail-tag.tag-category { background: var(--accent); color: var(--primary-dark); }
.detail-tag.tag-year { background: var(--black); color: var(--accent); }
.detail-info h2 {
  font-size: 30px; font-weight: 800; color: var(--primary);
  letter-spacing: 2px; margin-bottom: 22px;
}
.detail-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px; margin-bottom: 24px;
}
.detail-meta-item {
  background: var(--white); border: 1px solid var(--gray-100);
  border-radius: 10px; padding: 14px 18px;
  display: flex; flex-direction: column; gap: 4px;
}
.detail-meta-item .meta-label {
  font-size: 12px; color: var(--gray-500); letter-spacing: 1px;
}
.detail-meta-item .meta-value {
  font-size: 15px; font-weight: 600; color: var(--gray-900);
}
.detail-meta-item .meta-value .meta-en {
  font-style: normal; font-size: 13px; font-weight: 400;
  color: var(--gray-500); margin-left: 6px;
}
.detail-desc p { font-size: 16px; line-height: 2; color: var(--gray-700); margin-bottom: 14px; }
.detail-desc .detail-desc-en {
  font-size: 15px; color: var(--gray-500);
  border-left: 3px solid var(--accent); padding-left: 16px;
}

/* 相关案例 */
.related-section { border-top: 1px solid var(--gray-100); padding-top: 44px; }
.related-title {
  font-size: 22px; font-weight: 800; color: var(--primary);
  letter-spacing: 2px; margin-bottom: 26px;
}
.related-title span {
  display: inline-block; font-size: 12px; color: var(--gray-500);
  letter-spacing: 3px; margin-left: 10px; font-weight: 400;
}
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.related-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 4/3; box-shadow: var(--shadow); display: block;
  transition: transform 0.3s, box-shadow 0.3s;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.related-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.related-card:hover img { transform: scale(1.05); }
.related-info {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,41,34,0.92));
  padding: 40px 18px 14px; color: var(--white);
}
.related-info h4 { font-size: 15px; margin-bottom: 3px; }
.related-info p { font-size: 12px; color: var(--gray-300); }

/* 项目不存在 */
.notfound-box { text-align: center; padding: 60px 20px; }
.notfound-box h2 { font-size: 32px; color: var(--primary); font-weight: 800; margin-bottom: 14px; }
.notfound-box p { color: var(--gray-500); margin-bottom: 32px; }

/* 详情页响应式 */
@media (max-width: 900px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-info { padding: 28px 24px; }
}
@media (max-width: 768px) {
  .detail-hero { padding: 120px 0 40px; }
  .detail-hero h1 { font-size: 26px; }
  .breadcrumb { font-size: 12px; gap: 6px; }
  .detail-main-img { max-height: 380px; }
  .detail-thumbs { gap: 8px; }
  .detail-thumb { width: 74px; height: 56px; }
  .detail-nav { width: 38px; height: 38px; font-size: 22px; }
  .detail-info h2 { font-size: 24px; }
  .related-grid { grid-template-columns: 1fr; }
}

/* FAQ 行业索引 */
.faq-cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:10px 0 20px}
.faq-cat{display:flex;flex-direction:column;justify-content:space-between;gap:6px;padding:18px 20px;background:#fff;border:1px solid #e2e8e6;border-radius:12px;text-decoration:none;transition:box-shadow .2s,transform .2s}
.faq-cat:hover{box-shadow:0 6px 20px rgba(0,62,54,.12);transform:translateY(-2px)}
.faq-cat span{color:#003E36;font-weight:700;font-size:15px}
.faq-cat small{color:#889;font-size:12px}