/* ============================================================
   观居声学 GUANJU ACOUSTICS — 全局样式 v2.0
   行业：建筑隔音 / 声学材料 / 室内声学装修
   风格：专业、安静、可信赖；深蓝青绿 + 暖木色点缀；声波意象
   更新：2026-08-23 视觉升级（配色/字体/卡片/动效/新模块）
   ============================================================ */

:root {
  --navy: #0c2233;
  --navy-2: #123247;
  --teal: #0d9488;
  --teal-light: #14b8a6;
  --accent: #d4a574;      /* 暖木金，更沉稳 */
  --accent-2: #b8956a;
  --bg: #faf9f7;          /* 更暖的背景 */
  --bg-soft: #f5f4f2;
  --card: #ffffff;
  --ink: #111827;
  --muted: #6b7280;
  --line: #f0f0f0;        /* 更淡的边框 */
  --ok: #10b981;
  --radius: 16px;         /* 更大圆角 */
  --shadow: 0 20px 40px rgba(12, 34, 51, .08);
  --shadow-sm: 0 4px 12px rgba(12, 34, 51, .05);
  --shadow-hover: 0 24px 48px rgba(12, 34, 51, .12);
  --maxw: 1280px;
  --header-h: 80px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;      /* 更紧凑 */
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--accent-2); }

/* 字体层级优化 */
h1, h2, h3, h4 { 
  line-height: 1.25; 
  color: var(--navy); 
  margin: 0 0 .5em; 
  font-weight: 700; 
  letter-spacing: -0.02em;  /* 微负间距更现代 */
}
h1 { font-size: clamp(36px, 5vw, 56px); font-weight: 800; }
h2 { font-size: clamp(28px, 3.5vw, 40px); letter-spacing: -0.01em; }
h3 { font-size: clamp(20px, 2.2vw, 24px); }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
li { margin: .3em 0; }

/* ---------- 布局容器 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 40px; }
.section { padding: 100px 0; }
.section-sm { padding: 60px 0; }
.section-tight { padding: 40px 0; }
.bg-soft { background: var(--bg-soft); }
.bg-navy { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%); color: #eaf2f6; }
.bg-navy h1, .bg-navy h2, .bg-navy h3 { color: #fff; }
.bg-navy p { color: #c6d6df; }
.center { text-align: center; }
.lead { font-size: 18px; color: var(--muted); line-height: 1.7; }
.muted { color: var(--muted); }

/* eyebrow 更精致 */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: 2.5px;
  color: var(--teal); text-transform: uppercase; margin-bottom: 16px;
}
.eyebrow::before { 
  content: ""; display: inline-block; width: 24px; height: 2px; 
  background: var(--accent); border-radius: 1px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; 
  padding: 14px 28px;
  border-radius: 12px; font-weight: 600; font-size: 15px; 
  border: 0; cursor: pointer;
  transition: all .2s ease; 
  white-space: nowrap;
}
.btn-primary { 
  background: linear-gradient(135deg, var(--teal), var(--teal-light)); 
  color: #fff; 
  box-shadow: 0 8px 24px rgba(13,148,136,.3); 
}
.btn-primary:hover { 
  transform: translateY(-2px); 
  box-shadow: 0 12px 32px rgba(13,148,136,.4); 
  color:#fff; 
}
.btn-accent { 
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); 
  color: #fff; 
  box-shadow: 0 8px 24px rgba(212,165,116,.3); 
}
.btn-accent:hover { transform: translateY(-2px); color:#fff; }
.btn-ghost { 
  background: transparent; 
  color: var(--navy); 
  border: 1.5px solid var(--line); 
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); background: rgba(13,148,136,.03); }
.btn-light { background: #fff; color: var(--navy); box-shadow: var(--shadow-sm); }
.btn-light:hover { background: #f8fafc; transform: translateY(-1px); }
.btn-block { width: 100%; justify-content: center; }

/* 按钮图标动画 */
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- 顶部导航（新设计 2026-08-23）---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: all .3s ease;
}
.site-header.scrolled {
  height: 64px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.site-header.scrolled .nav-wrap { height: 64px; }
.site-header.scrolled .brand .logo-mark { width: 40px; height: 40px; }
.site-header.scrolled .brand-title { font-size: 20px; }
.site-header.scrolled .brand-subtitle { font-size: 11px; }
.site-header.scrolled .nav-links a { line-height: 64px; }
.site-header.scrolled .nav-links a.active::after { bottom: 12px; }

.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 80px;
  max-width: 100%; margin: 0 auto;
  padding: 0 60px;
  transition: height .3s ease;
}
.brand {
  display: flex; align-items: center; gap: 14px;
  margin-left: 0;
  flex: 0 0 auto;
}
.brand .logo-mark {
  width: 52px; height: 52px; border-radius: 14px; flex: none;
  background: linear-gradient(135deg, var(--navy) 0%, var(--teal) 100%);
  display: grid; place-items: center;
  transition: all .3s ease;
  box-shadow: 0 4px 16px rgba(13,148,136,.25);
}
.brand .logo-mark svg { width: 28px; height: 28px; }
.brand-text { display: flex; flex-direction: column; justify-content: center; }
.brand-title {
  font-size: 24px; font-weight: 700; color: #111827;
  line-height: 1.15; letter-spacing: -0.01em;
  transition: font-size .3s ease;
}
.brand-subtitle {
  font-size: 12px; font-weight: 500; color: var(--teal);
  letter-spacing: 1.5px; line-height: 1.2;
  margin-top: 3px;
  transition: font-size .3s ease;
  text-transform: uppercase;
}
.nav-links { 
  display: flex; align-items: center; 
  gap: 8px; 
  margin: 0 auto;
  flex: 1;
  justify-content: center;
  padding: 0 40px;
}
.nav-links a {
  padding: 0 20px;
  font-size: 15px; font-weight: 500; color: #374151;
  text-decoration: none;
  position: relative;
  line-height: 80px;
  transition: all 0.2s ease;
  border-radius: 8px;
}
.nav-links a:hover { 
  color: #0D9488; 
  background: rgba(13,148,136,.06);
}
.nav-links a:hover { color: #0D9488; }
.nav-links a.active {
  color: #0D9488;
}
.nav-links a.active {
  color: #0D9488;
  background: rgba(13,148,136,.08);
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 16px;
  left: 20px; right: 20px;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  border-radius: 2px;
}
.nav-cta {
  margin-left: 0;
  margin-right: 0;
  flex: 0 0 auto;
}
.btn-cta-nav {
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(13,148,136,.35);
}
.btn-cta-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(13,148,136,.45);
}
.btn-cta-nav {
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(90deg, #14B8A6, #0D9488);
  color: #FFFFFF;
  font-size: 14px; font-weight: 600;
  padding: 12px 24px;
  border-radius: 10px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(13,148,136,0.3);
  transition: all 0.2s ease;
  white-space: nowrap;
  gap: 6px;
}
.btn-cta-nav:hover {
  box-shadow: 0 6px 16px rgba(13,148,136,0.4);
  transform: translateY(-1px);
  color: #FFFFFF;
}
.btn-cta-nav .arrow { transition: transform .2s ease; }
.btn-cta-nav:hover .arrow { transform: translateX(3px); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; transition: .2s; }

/* ---------- HERO 轮播 ---------- */
.hero { position: relative; }
.carousel { 
  position: relative; 
  height: clamp(520px, 72vh, 680px);  /* 更高更有沉浸感 */
  overflow: hidden; 
  border-radius: 0 0 32px 32px; 
}
.slides { height: 100%; }
.slide {
  position: absolute; inset: 0; opacity: 0; 
  transition: opacity 1s ease, transform 1s ease;
  background-size: cover; background-position: center; 
  display: flex; align-items: center;
  transform: scale(1.05);
}
.slide.active { 
  opacity: 1; 
  transform: scale(1);
}
.slide::after { 
  content: ""; position: absolute; inset: 0; 
  background: linear-gradient(90deg, rgba(8,22,34,.75) 0%, rgba(8,22,34,.4) 50%, rgba(8,22,34,.1) 100%); 
}
.slide .slide-inner { 
  position: relative; z-index: 2; 
  max-width: var(--maxw); margin: 0 auto; 
  padding: 0 40px; width: 100%; 
}
.slide .tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.95); 
  color: var(--navy); 
  font-weight: 800;
  padding: 12px 20px; 
  border-radius: 999px; 
  font-size: 15px; 
  letter-spacing: 0.8px; 
  margin-bottom: 28px;
  box-shadow: 0 6px 20px rgba(0,0,0,.15);
  text-transform: uppercase;
}
.slide h1 { 
  color: #fff; 
  max-width: 800px; 
  font-size: clamp(44px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-shadow: 0 6px 40px rgba(0,0,0,.5), 0 2px 8px rgba(0,0,0,.3);
  margin-bottom: 24px;
}
.slide p { 
  color: rgba(255,255,255,.95); 
  font-size: clamp(18px, 2vw, 22px); 
  max-width: 620px;
  line-height: 1.75;
  font-weight: 400;
  text-shadow: 0 2px 12px rgba(0,0,0,.4);
}
.slide .slide-actions { 
  margin-top: 40px; 
  display: flex; 
  gap: 20px; 
  flex-wrap: wrap; 
}
.slide .slide-actions .btn {
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  box-shadow: 0 8px 28px rgba(0,0,0,.25);
}
.slide .slide-actions .btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--navy);
}
.slide .slide-actions .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,.35);
}
.slide .slide-actions .btn-light {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 2px solid rgba(255,255,255,.3);
  backdrop-filter: blur(8px);
}
.slide .slide-actions .btn-light:hover {
  background: rgba(255,255,255,.25);
  border-color: rgba(255,255,255,.5);
}
.carousel-dots { 
  position: absolute; bottom: 28px; left: 50%; 
  transform: translateX(-50%); z-index: 3; 
  display: flex; gap: 10px; 
}
.carousel-dots button { 
  width: 10px; height: 10px; 
  border-radius: 50%; border: 0; 
  background: rgba(255,255,255,.4); 
  cursor: pointer; padding: 0; 
  transition: all .3s ease; 
}
.carousel-dots button.active { 
  background: var(--accent); 
  width: 32px; 
  border-radius: 5px; 
}
.carousel-arrow { 
  position: absolute; top: 50%; transform: translateY(-50%); 
  z-index: 3; width: 52px; height: 52px; 
  border-radius: 50%; border: 0; 
  background: rgba(255,255,255,.15); 
  color: #fff; font-size: 20px; 
  cursor: pointer; backdrop-filter: blur(8px); 
  display: grid; place-items: center;
  transition: all .2s ease;
  border: 1px solid rgba(255,255,255,.1);
}
.carousel-arrow:hover { 
  background: rgba(255,255,255,.3); 
  transform: translateY(-50%) scale(1.05);
}
.carousel-arrow.prev { left: 24px; } 
.carousel-arrow.next { right: 24px; }

/* 无限滚动品牌条 */
.logo-marquee {
  background: linear-gradient(90deg, #f8fafc 0%, #fff 50%, #f8fafc 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 24px 0;
  overflow: hidden;
  position: relative;
}
.logo-marquee::before,
.logo-marquee::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}
.logo-marquee::before {
  left: 0;
  background: linear-gradient(90deg, #f8fafc, transparent);
}
.logo-marquee::after {
  right: 0;
  background: linear-gradient(-90deg, #f8fafc, transparent);
}
.marquee-label {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee-track:hover {
  animation-play-state: paused;
}
.marquee-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 28px;
  margin: 0 12px;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  transition: all .2s ease;
}
.marquee-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--teal-light);
}
.marquee-item .icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 16px;
  flex-shrink: 0;
}
.marquee-item span {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* HERO 下方快捷数据条 */
.trustbar { background: var(--navy); color: #fff; }
.trustbar .container { display: flex; flex-wrap: wrap; gap: 8px 0; padding: 28px 40px; }
.trust-item { 
  flex: 1 1 160px; text-align: center; 
  border-right: 1px solid rgba(255,255,255,.1); 
  padding: 8px 16px; 
}
.trust-item:last-child { border-right: 0; }
.trust-item .num { 
  font-size: 32px; font-weight: 800; 
  color: var(--accent); 
  letter-spacing: -1px;
}
.trust-item .lbl { font-size: 13px; color: #9fb6c1; margin-top: 4px; }

/* ---------- 卡片网格（更精致）---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); 
  border: 1px solid var(--line); 
  border-radius: var(--radius);
  padding: 32px; 
  box-shadow: var(--shadow-sm); 
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  transform: scaleX(0);
  transition: transform .3s ease;
}
.card:hover { 
  transform: translateY(-6px); 
  box-shadow: var(--shadow-hover); 
}
.card:hover::before { transform: scaleX(1); }
.card .ico {
  width: 56px; height: 56px; 
  border-radius: 14px; 
  background: linear-gradient(135deg, #e6f6f7, #d6eef0);
  display: grid; place-items: center; 
  margin-bottom: 20px; 
  color: var(--teal); 
  font-size: 26px;
  transition: transform .3s ease;
}
.card:hover .ico { transform: scale(1.05) rotate(-3deg); }
.card h3 { font-size: 20px; margin-bottom: 12px; font-weight: 700; }
.card p { color: var(--muted); font-size: 15px; margin: 0; line-height: 1.7; }
.card .more { 
  display: inline-flex; align-items: center; gap: 4px;
  margin-top: 16px; 
  font-weight: 600; 
  color: var(--teal); 
  font-size: 14px;
  transition: gap .2s ease;
}
.card .more:hover { gap: 8px; }

/* 特色（带图）卡片 */
.feature {
  background: var(--card); 
  border: 1px solid var(--line); 
  border-radius: var(--radius); 
  overflow: hidden;
  box-shadow: var(--shadow-sm); 
  transition: all .3s ease; 
  display: flex; flex-direction: column;
}
.feature:hover { 
  transform: translateY(-6px); 
  box-shadow: var(--shadow-hover); 
}
.feature .thumb { 
  aspect-ratio: 4/3; 
  background: var(--bg-soft) center/cover no-repeat;
  position: relative;
}
.feature .thumb::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.3), transparent 50%);
  opacity: 0;
  transition: opacity .3s ease;
}
.feature:hover .thumb::after { opacity: 1; }
.feature .body { 
  padding: 24px 28px 28px; 
  flex: 1; 
  display: flex; flex-direction: column; 
}
.feature h3 { font-size: 20px; margin-bottom: 10px; font-weight: 700; }
.feature p { color: var(--muted); font-size: 15px; flex: 1; line-height: 1.7; }
.feature .more { 
  margin-top: 16px; 
  font-weight: 600; 
  color: var(--teal); 
  font-size: 14px;
  display: inline-flex; align-items: center; gap: 4px;
}

/* 产品卡（方图） */
.product .thumb { aspect-ratio: 1/1; }

/* ---------- 区块标题 ---------- */
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head .eyebrow { margin-bottom: 16px; }
.section-head h2 { margin-bottom: 16px; }
.section-head p { color: var(--muted); font-size: 17px; line-height: 1.7; }

/* ---------- 关于/优势 条纹 ---------- */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.split.reverse { grid-template-columns: 1fr 1.05fr; }
.split .media { 
  border-radius: var(--radius); 
  overflow: hidden; 
  box-shadow: var(--shadow); 
  aspect-ratio: 4/3; 
  background: var(--bg-soft) center/cover no-repeat;
  position: relative;
}
.split .media::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.05);
}
.checklist { list-style: none; padding: 0; margin: 24px 0 0; }
.checklist li { 
  position: relative; 
  padding-left: 36px; 
  margin: 14px 0; 
  font-size: 15px;
  color: #374151;
}
.checklist li::before {
  content: "✓"; 
  position: absolute; left: 0; top: 2px; 
  width: 24px; height: 24px; 
  border-radius: 50%;
  background: var(--teal); 
  color: #fff; 
  display: grid; place-items: center; 
  font-size: 12px; font-weight: 800;
}

/* 优势计数 */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 16px; }
.stat { 
  background: rgba(255,255,255,.06); 
  border: 1px solid rgba(255,255,255,.12); 
  border-radius: var(--radius); 
  padding: 28px 20px; 
  text-align: center;
  transition: transform .2s ease;
}
.stat:hover { transform: translateY(-4px); }
.stat .num { 
  font-size: 36px; font-weight: 800; 
  color: var(--accent); 
  letter-spacing: -1px;
}
.stat .lbl { font-size: 14px; color: #9fb6c1; margin-top: 6px; }

/* ---------- 服务流程步骤（可视化升级）---------- */
.steps { 
  display: grid; 
  grid-template-columns: repeat(4, 1fr); 
  gap: 24px;
  position: relative;
}
.steps::before {
  content: "";
  position: absolute; top: 40px; left: 12%; right: 12%; height: 2px;
  background: linear-gradient(90deg, var(--line), var(--teal) 50%, var(--line));
  z-index: 0;
}
.step { 
  position: relative; 
  padding: 32px 24px 28px; 
  background: var(--card); 
  border: 1px solid var(--line); 
  border-radius: var(--radius);
  text-align: center;
  z-index: 1;
  transition: all .3s ease;
}
.step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--teal-light);
}
.step-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--teal-light));
  color: #fff;
  font-size: 24px;
  display: grid; place-items: center;
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(13,148,136,.3);
}
.step h4 { margin-top: 0; font-size: 18px; font-weight: 700; }
.step p { color: var(--muted); font-size: 14px; margin: 0; line-height: 1.6; }

/* ---------- 客户评价（新增模块）---------- */
.testimonials { background: var(--bg-soft); }
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  position: relative;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.testimonial-card::before {
  content: """;
  position: absolute; top: 20px; right: 24px;
  font-size: 60px; color: var(--teal-light);
  opacity: .2;
  font-family: Georgia, serif;
  line-height: 1;
}
.testimonial-stars {
  color: var(--accent);
  font-size: 16px;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.testimonial-text {
  font-size: 15px;
  color: #374151;
  line-height: 1.75;
  margin-bottom: 20px;
}
.testimonial-author {
  display: flex; align-items: center; gap: 12px;
}
.testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-light), var(--teal));
  display: grid; place-items: center;
  color: #fff; font-weight: 600; font-size: 16px;
}
.testimonial-name { font-weight: 600; color: var(--navy); font-size: 15px; }
.testimonial-role { font-size: 13px; color: var(--muted); }

/* ---------- 文章 / 新闻列表 ---------- */
.article-list { display: grid; gap: 24px; }
.article-card { 
  display: grid; 
  grid-template-columns: 240px 1fr; 
  gap: 24px; 
  background: var(--card); 
  border: 1px solid var(--line); 
  border-radius: var(--radius); 
  overflow: hidden; 
  box-shadow: var(--shadow-sm); 
  transition: all .3s ease;
}
.article-card:hover { 
  transform: translateY(-4px); 
  box-shadow: var(--shadow); 
}
.article-card .thumb { 
  background: var(--bg-soft) center/cover no-repeat; 
  min-height: 180px;
  position: relative;
}
.article-card .thumb::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.2), transparent);
  opacity: 0;
  transition: opacity .3s ease;
}
.article-card:hover .thumb::after { opacity: 1; }
.article-card .body { padding: 24px 28px 24px 0; }
.article-card .date { 
  font-size: 13px; 
  color: var(--teal); 
  font-weight: 600;
  display: flex; align-items: center; gap: 6px;
}
.article-card h3 { font-size: 20px; margin: 10px 0 10px; font-weight: 700; }
.article-card p { color: var(--muted); font-size: 15px; margin: 0; line-height: 1.7; }
.tag-row { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag-pill { 
  font-size: 12px; 
  background: var(--bg-soft); 
  color: var(--muted); 
  padding: 4px 12px; 
  border-radius: 999px;
  transition: all .2s ease;
}
.tag-pill:hover { background: var(--teal-light); color: #fff; }

/* 文章详情 */
.article { max-width: 820px; margin: 0 auto; }
.article .meta { color: var(--teal); font-weight: 600; font-size: 14px; }
.article h1 { margin: 12px 0 20px; }
.article h2 { font-size: 26px; margin-top: 40px; }
.article h3 { font-size: 20px; margin-top: 30px; }
.article p, .article li { font-size: 16px; color: #374151; line-height: 1.8; }
.article blockquote { 
  border-left: 4px solid var(--accent); 
  background: var(--bg-soft); 
  margin: 24px 0; 
  padding: 20px 24px; 
  border-radius: 0 12px 12px 0; 
  color: var(--muted);
  font-style: italic;
}

/* FAQ */
.faq-search { max-width: 560px; margin: 0 auto 40px; position: relative; }
.faq-search::before {
  content: "🔍";
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  font-size: 16px; opacity: .5;
}
.faq-search input { 
  width: 100%; 
  padding: 16px 20px 16px 48px; 
  border: 1px solid var(--line); 
  border-radius: 999px; 
  font-size: 15px; 
  outline: none;
  background: var(--card);
  transition: all .2s ease;
}
.faq-search input:focus { 
  border-color: var(--teal); 
  box-shadow: 0 0 0 4px rgba(13,148,136,.1);
}
.faq-item { 
  background: var(--card); 
  border: 1px solid var(--line); 
  border-radius: 14px; 
  margin-bottom: 12px; 
  overflow: hidden;
  transition: all .2s ease;
}
.faq-item:hover { border-color: #e5e7eb; }
.faq-q { 
  width: 100%; text-align: left; 
  background: none; border: 0; 
  padding: 20px 24px; 
  font-size: 16px; 
  font-weight: 600; 
  color: var(--navy); 
  cursor: pointer; 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  gap: 12px; 
}
.faq-q .plus { 
  color: var(--teal); 
  font-size: 24px; 
  transition: transform .3s ease; 
  flex: none;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--bg-soft);
}
.faq-item.open .faq-q .plus { 
  transform: rotate(45deg); 
  background: var(--teal);
  color: #fff;
}
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-a-inner { padding: 0 24px 24px; color: #4b5563; line-height: 1.75; }
.faq-item.open .faq-a { max-height: 800px; }
.faq-cat { 
  font-size: 12px; font-weight: 700; letter-spacing: 1.5px; 
  color: var(--accent-2); text-transform: uppercase; 
  margin: 36px 0 16px; 
}

/* ---------- 表单 ---------- */
.form-card { 
  background: var(--card); 
  border: 1px solid var(--line); 
  border-radius: var(--radius); 
  padding: 36px; 
  box-shadow: var(--shadow); 
}
.field { margin-bottom: 20px; }
.field label { 
  display: block; 
  font-weight: 600; 
  font-size: 14px; 
  margin-bottom: 8px; 
  color: var(--navy); 
}
.field input, .field textarea, .field select {
  width: 100%; 
  padding: 14px 16px; 
  border: 1px solid var(--line); 
  border-radius: 12px; 
  font-size: 15px;
  font-family: inherit; 
  outline: none; 
  background: #fff; 
  transition: all .2s ease;
}
.field input:focus, .field textarea:focus, .field select:focus { 
  border-color: var(--teal); 
  box-shadow: 0 0 0 4px rgba(13,148,136,.08);
}
.field textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 8px; }
.form-ok { 
  display: none; 
  background: #ecfdf5; 
  border: 1px solid #a7f3d0; 
  color: #065f46; 
  padding: 16px 20px; 
  border-radius: 12px; 
  margin-bottom: 20px;
  font-weight: 500;
}
.form-err { 
  display: none; 
  background: #fef2f2; 
  border: 1px solid #fecaca; 
  color: #991b1b; 
  padding: 16px 20px; 
  border-radius: 12px; 
  margin-bottom: 20px;
  font-weight: 500;
}

/* 联系信息块 */
.contact-info { list-style: none; padding: 0; margin: 0; }
.contact-info li { 
  display: flex; gap: 16px; 
  align-items: flex-start; 
  padding: 18px 0; 
  border-bottom: 1px solid var(--line); 
}
.contact-info li:last-child { border-bottom: 0; }
.contact-info .ci-ico { 
  width: 48px; height: 48px; 
  border-radius: 12px; 
  background: var(--bg-soft); 
  display: grid; place-items: center; 
  color: var(--teal); 
  font-size: 22px; 
  flex: none;
  transition: all .2s ease;
}
.contact-info li:hover .ci-ico {
  background: var(--teal);
  color: #fff;
}
.contact-info .ci-label { font-size: 13px; color: var(--muted); margin-bottom: 2px; }
.contact-info .ci-val { font-weight: 600; color: var(--navy); font-size: 15px; }

/* ---------- CTA 区 ---------- */
.cta-band { 
  background: linear-gradient(135deg, var(--teal), var(--navy)); 
  color: #fff; 
  border-radius: 24px; 
  padding: 60px; 
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; top: -50%; right: -20%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,.1) 0%, transparent 70%);
  pointer-events: none;
}
.cta-band h2 { color: #fff; position: relative; }
.cta-band p { 
  color: rgba(255,255,255,.85); 
  max-width: 600px; 
  margin: 0 auto 28px;
  font-size: 17px;
  position: relative;
}

/* ---------- 悬浮客服按钮（新增）---------- */
.float-cta {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}
.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--teal-light));
  color: #fff;
  border: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 24px;
  box-shadow: 0 8px 24px rgba(13,148,136,.4);
  transition: all .3s ease;
  position: relative;
}
.float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 32px rgba(13,148,136,.5);
}
.float-btn.pulse::after {
  content: "";
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--teal);
  animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.5); opacity: 0; }
}
.float-label {
  background: var(--card);
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateX(10px);
  transition: all .3s ease;
  pointer-events: none;
}
.float-cta:hover .float-label {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- 页脚 ---------- */
.site-footer { 
  background: var(--navy); 
  color: #9fb6c1; 
  padding: 72px 0 32px; 
}
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; }
.site-footer h4 { 
  color: #fff; 
  font-size: 15px; 
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.site-footer a { 
  color: #9fb6c1; 
  display: block; 
  padding: 6px 0; 
  font-size: 14px;
  transition: color .2s ease;
}
.site-footer a:hover { color: var(--accent); }
.footer-brand p { font-size: 14px; color: #8aa1ad; line-height: 1.7; }
.footer-brand .brand-mini {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .brand-mini .logo-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--teal), var(--teal-light));
  display: grid; place-items: center;
}
.footer-brand .brand-mini .logo-icon svg { width: 20px; height: 20px; }
.footer-brand .brand-mini span { color: #fff; font-weight: 600; font-size: 16px; }
.footer-bottom { 
  border-top: 1px solid rgba(255,255,255,.1); 
  margin-top: 48px; 
  padding-top: 24px; 
  font-size: 13px; 
  color: #6b8a9a; 
  display: flex; 
  justify-content: space-between; 
  flex-wrap: wrap; 
  gap: 12px; 
}
.footer-bottom a { display: inline; color: #6b8a9a; }
.wave-divider { display: block; width: 100%; height: 60px; }

/* ---------- 面包屑 / 页头 ---------- */
.page-hero { 
  background: linear-gradient(160deg, var(--navy), var(--navy-2)); 
  color: #fff; 
  padding: 72px 0 80px; 
  position: relative;
}
.page-hero::after {
  content: "";
  position: absolute; bottom: 0; left: 0; right: 0; height: 100px;
  background: linear-gradient(to top, var(--bg), transparent);
}
.page-hero h1 { color: #fff; position: relative; }
.page-hero p { color: #c6d6df; max-width: 640px; position: relative; }
.crumb { 
  font-size: 13px; 
  color: #8aa1ad; 
  margin-bottom: 16px;
  position: relative;
}
.crumb a { color: #8aa1ad; transition: color .2s ease; }
.crumb a:hover { color: var(--accent); }

/* ---------- 声波装饰 ---------- */
.wave-deco { display: inline-flex; align-items: flex-end; gap: 3px; height: 24px; }
.wave-deco i { width: 3px; background: var(--teal-light); border-radius: 3px; animation: wave 1.2s ease-in-out infinite; }
.wave-deco i:nth-child(1){ height: 8px; animation-delay: 0s; }
.wave-deco i:nth-child(2){ height: 20px; animation-delay: .15s; }
.wave-deco i:nth-child(3){ height: 14px; animation-delay: .3s; }
.wave-deco i:nth-child(4){ height: 22px; animation-delay: .45s; }
.wave-deco i:nth-child(5){ height: 10px; animation-delay: .6s; }
@keyframes wave { 0%,100%{ transform: scaleY(.5);} 50%{ transform: scaleY(1);} }

/* ---------- 滚动显示动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .section { padding: 80px 0; }
  .split { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
}
@media (max-width: 768px) {
  .nav-wrap { padding: 0 20px; }
  .nav-links { 
    display: none; 
    position: absolute; top: var(--header-h); left: 0; right: 0; 
    flex-direction: column; 
    background: #fff; 
    border-bottom: 1px solid var(--line); 
    padding: 12px; 
    gap: 4px; 
    box-shadow: var(--shadow);
    margin: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a { 
    padding: 14px 16px; 
    line-height: 1.5;
    border-radius: 8px;
  }
  .nav-links a:hover { background: var(--bg-soft); }
  .nav-links a.active::after { display: none; }
  .btn-cta-nav { display: none; }
  .nav-cta-mobile { 
    display: block !important; 
    margin: 8px 16px;
    text-align: center;
  }
  .nav-toggle { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: 1fr; }
  .article-card { grid-template-columns: 1fr; }
  .article-card .thumb { min-height: 200px; }
  .article-card .body { padding: 24px; }
  .section { padding: 60px 0; }
  .cta-band { padding: 40px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .trustbar .container { gap: 0; padding: 20px; }
  .trust-item { flex: 1 1 50%; border-right: 0; padding: 12px; }
  .float-cta { bottom: 20px; right: 20px; }
  .float-btn { width: 48px; height: 48px; font-size: 20px; }
}
@media (max-width: 480px) {
  .steps { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: 28px; }
  h2 { font-size: 24px; }
}