/* =========================================
   西安铭赞网络 日语网站建设 营销官网
   主题：日式简约 + 现代商务
   字体：系统免费字体栈（无版权风险）
   ========================================= */

/* ===== CSS变量：日式和色 + 商务黑 ===== */
:root{
  /* 主色 - 朱红（和色·赤红/朱色） */
  --color-primary: #C8102E;
  --color-primary-dark: #9B0C24;
  --color-primary-light: #E83A4D;
  /* 辅色 - 墨黑 */
  --color-ink: #1A1A1A;
  --color-ink-soft: #333333;
  /* 强调色 - 金茶（和色） */
  --color-gold: #C5A572;
  --color-gold-light: #D4A574;
  /* 中性色 - 和纸 */
  --color-paper: #F7F4ED;
  --color-paper-warm: #F1ECE0;
  --color-white: #FFFFFF;
  --color-line: #E5E0D5;
  --color-gray-1: #F5F5F5;
  --color-gray-2: #E5E5E5;
  --color-gray-3: #999999;
  --color-gray-4: #666666;
  /* 字体栈 - 全部使用免费/系统字体，无版权风险 */
  --font-zh: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans CN", "WenQuanYi Micro Hei", sans-serif;
  --font-jp: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", "Noto Sans JP", "MS PGothic", sans-serif;
  --font-en: "Helvetica Neue", "Helvetica", "Arial", "Segoe UI", sans-serif;
  --font-display: "Times New Roman", "Hiragino Mincho ProN", "Yu Mincho", "Songti SC", "STSong", serif;
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
  /* 圆角 - 直角为主 */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  /* 容器 */
  --container: 1280px;
  --container-wide: 1400px;
  /* 过渡 */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;font-size:16px}
body{
  font-family:var(--font-zh);
  color:var(--color-ink);
  background:var(--color-white);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button,input,textarea,select{font:inherit;color:inherit;border:none;background:transparent;outline:none}
button{cursor:pointer}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;letter-spacing:-.01em}

/* ===== 容器 ===== */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 32px;font-size:15px;font-weight:500;
  letter-spacing:.05em;border:1px solid transparent;
  transition:all .3s var(--ease);
  cursor:pointer;white-space:nowrap;
}
.btn-primary{
  background:var(--color-primary);color:#fff;
  border-color:var(--color-primary);
}
.btn-primary:hover{
  background:var(--color-primary-dark);
  border-color:var(--color-primary-dark);
  transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(200,16,46,.25);
}
.btn-ghost{
  background:transparent;color:#fff;
  border-color:rgba(255,255,255,.4);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.1);
  border-color:#fff;
  transform:translateY(-1px);
}

/* ===== 导航 + Banner 一体区 ===== */
.hero{
  position:relative;
  min-height:100vh;
  background:#0a0a0a;
  color:#fff;
  overflow:hidden;
  isolation:isolate;
  display:flex;flex-direction:column;
}

/* 动态背景层 */
.hero-bg{position:absolute;inset:0;z-index:-1;overflow:hidden}
.hero-bg-gradient{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(200,16,46,.35) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(197,165,114,.25) 0%, transparent 55%),
    radial-gradient(ellipse at 50% 100%, rgba(155,12,36,.20) 0%, transparent 60%),
    linear-gradient(135deg, #1a0508 0%, #0a0a0a 50%, #1a0f08 100%);
  animation:heroGradientShift 20s var(--ease) infinite;
}
@keyframes heroGradientShift{
  0%,100%{background-position:0% 0%, 100% 100%, 50% 100%, 0% 0%}
  50%{background-position:30% 20%, 70% 80%, 50% 80%, 0% 0%}
}
.hero-bg-pattern{
  position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,.05) 1px, transparent 0);
  background-size:40px 40px;
  opacity:.6;
}
.hero-bg-circle{
  position:absolute;border-radius:50%;
  background:radial-gradient(circle, rgba(200,16,46,.15) 0%, transparent 70%);
  filter:blur(40px);
  animation:heroCircleFloat 25s ease-in-out infinite;
}
.hero-bg-circle-1{width:600px;height:600px;top:-200px;left:-200px;animation-delay:0s}
.hero-bg-circle-2{width:500px;height:500px;bottom:-150px;right:-100px;animation-delay:-8s}
.hero-bg-circle-3{width:400px;height:400px;top:40%;left:50%;transform:translateX(-50%);animation-delay:-15s}
@keyframes heroCircleFloat{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(50px,-30px) scale(1.05)}
  66%{transform:translate(-30px,40px) scale(.95)}
}

/* 顶部导航 */
.navbar{
  position:relative;z-index:10;
  padding:20px 0;
  transition:all .3s var(--ease);
}
.navbar.scrolled{
  position:fixed;top:0;left:0;right:0;
  background:rgba(10,10,10,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.08);
  padding:12px 0;
}
.nav-container{
  max-width:var(--container-wide);
  margin:0 auto;padding:0 32px;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;
}

/* LOGO */
.logo{
  display:flex;align-items:center;gap:10px;
  font-weight:600;font-size:20px;letter-spacing:.02em;
  color:#fff;flex-shrink:0;
}
.logo-brand{position:relative;display:inline-flex;align-items:flex-start}
.logo-brand .logo-r{
  font-size:10px;font-weight:400;
  color:var(--color-gold-light);
  margin-left:2px;line-height:1;
  position:relative;top:-2px;
}
.logo-divider{
  color:rgba(255,255,255,.4);font-weight:300;margin:0 2px;
}
.logo-slogan{
  font-weight:400;font-size:18px;
  font-family:var(--font-jp);
  color:#fff;letter-spacing:.04em;
}
.logo-footer{color:var(--color-ink)}
.logo-footer .logo-slogan{color:var(--color-ink)}

/* 导航菜单 */
.nav-menu{
  display:flex;align-items:center;gap:4px;
  flex:1;justify-content:flex-end;
}
.nav-menu li a{
  display:block;padding:8px 16px;
  font-size:14px;font-weight:400;
  color:rgba(255,255,255,.85);
  transition:all .2s var(--ease);
  position:relative;
}
.nav-menu li a::after{
  content:'';position:absolute;left:50%;bottom:2px;
  width:0;height:1px;background:var(--color-primary-light);
  transition:all .3s var(--ease);
  transform:translateX(-50%);
}
.nav-menu li a:hover{color:#fff}
.nav-menu li a:hover::after{width:60%}
.nav-menu li a.nav-cta{
  margin-left:8px;padding:10px 20px;
  background:var(--color-primary);
  color:#fff;font-weight:500;
  border:1px solid var(--color-primary);
}
.nav-menu li a.nav-cta:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark)}
.nav-menu li a.nav-cta::after{display:none}

/* 移动端汉堡菜单 */
.nav-toggle{
  display:none;flex-direction:column;
  gap:4px;padding:8px;
}
.nav-toggle span{
  display:block;width:24px;height:1.5px;
  background:#fff;transition:all .3s var(--ease);
}
.nav-toggle.active span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* Banner 主内容 */
.hero-content{
  flex:1;display:flex;flex-direction:column;justify-content:center;
  padding:60px 0 100px;position:relative;
}
.hero-inner{
  max-width:var(--container-wide);
  margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:1.1fr .9fr;gap:60px;
  align-items:center;width:100%;
}
.hero-text{max-width:620px}
.hero-eyebrow{
  display:inline-block;
  font-size:13px;font-weight:500;letter-spacing:.2em;
  color:var(--color-gold-light);margin-bottom:24px;
  padding:6px 16px;border:1px solid rgba(197,165,114,.3);
  border-radius:var(--radius-sm);
  text-transform:uppercase;
}
.hero-title{
  font-size:clamp(40px, 5.5vw, 68px);
  font-weight:700;line-height:1.1;
  margin-bottom:24px;
  font-family:var(--font-zh);
  letter-spacing:-.02em;
}
.hero-title-jp{
  display:block;font-family:var(--font-jp);
  font-size:clamp(24px, 3vw, 36px);
  font-weight:400;color:var(--color-gold-light);
  margin-top:8px;letter-spacing:.1em;
}
.hero-subtitle{
  font-size:16px;line-height:1.9;
  color:rgba(255,255,255,.78);
  margin-bottom:36px;
  max-width:580px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:24px 32px;
  padding-top:32px;border-top:1px solid rgba(255,255,255,.1);
}
.hero-trust li{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:rgba(255,255,255,.75);
}
.trust-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--color-primary-light);
  box-shadow:0 0 0 3px rgba(232,58,77,.2);
}

/* Hero 视觉卡片 */
.hero-visual{
  position:relative;
  height:480px;
  display:flex;align-items:center;justify-content:center;
}
.hero-card{
  background:#fff;color:var(--color-ink);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-xl);
  overflow:hidden;
  position:absolute;
}
.hero-card-main{
  width:100%;max-width:380px;
  top:20px;left:0;
  transform:rotate(-2deg);
  z-index:2;
}
.hero-card-sub{
  width:240px;bottom:0;right:0;
  transform:rotate(3deg);
  z-index:1;
}
.card-bar{
  display:flex;align-items:center;gap:6px;
  padding:10px 14px;background:var(--color-gray-1);
  border-bottom:1px solid var(--color-gray-2);
}
.card-dot{width:10px;height:10px;border-radius:50%}
.card-dot-r{background:#FF5F57}
.card-dot-y{background:#FFBD2E}
.card-dot-g{background:#28C940}
.card-url{
  margin-left:8px;font-size:11px;
  color:var(--color-gray-3);
  font-family:var(--font-en);
}
.card-body{padding:24px}
.card-jp-eyebrow{
  font-family:var(--font-jp);font-size:11px;
  color:var(--color-primary);letter-spacing:.2em;
  margin-bottom:12px;
}
.card-jp-title{
  font-family:var(--font-jp);font-size:18px;
  font-weight:600;line-height:1.5;
  margin-bottom:16px;
}
.card-jp-line{
  height:6px;background:var(--color-gray-1);
  border-radius:3px;margin-bottom:8px;
}
.card-jp-line.short{width:60%}
.card-jp-btn{
  display:inline-block;margin-top:16px;
  padding:8px 16px;background:var(--color-primary);
  color:#fff;font-family:var(--font-jp);
  font-size:13px;border-radius:var(--radius-sm);
}
.card-body-mini{
  display:flex;justify-content:space-around;
  padding:24px 16px;
}
.mini-stat{text-align:center}
.mini-num{
  display:block;font-size:28px;font-weight:700;
  color:var(--color-primary);
  font-family:var(--font-en);
}
.mini-lbl{
  display:block;font-size:12px;
  color:var(--color-gray-4);margin-top:4px;
}

/* 关键词滚动条 */
.hero-keywords{
  position:absolute;bottom:0;left:0;right:0;
  padding:20px 0;
  background:linear-gradient(to top, rgba(0,0,0,.4), transparent);
  border-top:1px solid rgba(255,255,255,.08);
  overflow:hidden;
}
.kw-track{
  display:flex;gap:32px;
  white-space:nowrap;
  animation:kwScroll 40s linear infinite;
  font-size:13px;color:rgba(255,255,255,.5);
  font-family:var(--font-jp);
}
.kw-track span{flex-shrink:0}
@keyframes kwScroll{
  0%{transform:translateX(0)}
  100%{transform:translateX(-50%)}
}

/* 向下滚动指示 */
.hero-scroll{
  position:absolute;bottom:80px;left:50%;
  transform:translateX(-50%);
  width:24px;height:40px;
  border:1.5px solid rgba(255,255,255,.3);
  border-radius:12px;
  display:flex;justify-content:center;padding-top:8px;
  z-index:5;
}
.hero-scroll span{
  width:2px;height:6px;background:#fff;
  border-radius:1px;
  animation:scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot{
  0%{transform:translateY(0);opacity:1}
  100%{transform:translateY(12px);opacity:0}
}

/* ===== 通用 section ===== */
.section{padding:120px 0;position:relative}
.section-stats{padding:80px 0;background:var(--color-paper)}
.section-head{text-align:center;max-width:720px;margin:0 auto 80px}
.section-eyebrow{
  font-size:12px;font-weight:600;letter-spacing:.3em;
  color:var(--color-primary);
  margin-bottom:16px;
  text-transform:uppercase;
}
.section-title{
  font-size:clamp(28px, 3.5vw, 40px);
  font-weight:700;line-height:1.25;
  margin-bottom:20px;
  position:relative;display:inline-block;
}
.section-title::after{
  content:'';display:block;
  width:48px;height:2px;
  background:var(--color-primary);
  margin:24px auto 0;
}
.section-sub{
  font-size:16px;color:var(--color-gray-4);
  line-height:1.8;
}

/* ===== 核心数据 ===== */
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;
}
.stat-item{
  text-align:center;padding:40px 24px;
  position:relative;
}
.stat-item::after{
  content:'';position:absolute;right:0;top:25%;height:50%;
  width:1px;background:var(--color-line);
}
.stat-item:last-child::after{display:none}
.stat-num{
  font-size:clamp(40px, 5vw, 56px);
  font-weight:700;line-height:1;
  color:var(--color-primary);
  font-family:var(--font-en);
  display:inline-flex;align-items:baseline;
}
.stat-unit{
  font-size:24px;margin-left:4px;
  font-weight:500;
}
.stat-label{
  margin-top:12px;font-size:14px;
  color:var(--color-gray-4);
  letter-spacing:.05em;
}

/* ===== 服务介绍 ===== */
.services-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.service-card{
  position:relative;padding:40px 32px;
  background:#fff;
  border:1px solid var(--color-line);
  transition:all .4s var(--ease);
  overflow:hidden;
}
.service-card::before{
  content:'';position:absolute;top:0;left:0;
  width:0;height:2px;background:var(--color-primary);
  transition:width .5s var(--ease);
}
.service-card:hover{
  border-color:var(--color-primary);
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
}
.service-card:hover::before{width:100%}
.service-num{
  font-size:14px;font-weight:600;
  color:var(--color-primary);
  font-family:var(--font-en);
  letter-spacing:.2em;
  margin-bottom:16px;
}
.service-title{
  font-size:20px;font-weight:600;
  margin-bottom:16px;
  line-height:1.4;
}
.service-desc{
  font-size:14px;color:var(--color-gray-4);
  line-height:1.8;margin-bottom:20px;
}
.service-list{
  border-top:1px solid var(--color-line);
  padding-top:20px;
}
.service-list li{
  font-size:13px;color:var(--color-gray-4);
  padding:6px 0;padding-left:18px;
  position:relative;
}
.service-list li::before{
  content:'·';position:absolute;left:4px;
  color:var(--color-primary);font-weight:700;
}

/* ===== 服务优势 ===== */
.section-advantages{background:var(--color-paper)}
.advantages-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.advantage-item{text-align:center;padding:20px}
.advantage-icon{
  width:72px;height:72px;margin:0 auto 24px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:50%;
  color:var(--color-primary);
  transition:all .4s var(--ease);
}
.advantage-icon svg{width:32px;height:32px}
.advantage-item:hover .advantage-icon{
  background:var(--color-primary);color:#fff;
  border-color:var(--color-primary);
  transform:rotateY(180deg);
}
.advantage-title{
  font-size:18px;font-weight:600;
  margin-bottom:12px;
}
.advantage-desc{
  font-size:14px;color:var(--color-gray-4);
  line-height:1.8;
}

/* ===== 建站流程 ===== */
.process-timeline{
  display:grid;grid-template-columns:repeat(6,1fr);
  gap:16px;position:relative;
}
.process-timeline::before{
  content:'';position:absolute;
  top:32px;left:8%;right:8%;height:1px;
  background:var(--color-line);z-index:0;
}
.process-step{
  text-align:center;position:relative;
  padding:0 8px;
}
.process-num{
  width:64px;height:64px;
  margin:0 auto 20px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--color-line);
  border-radius:50%;
  font-size:18px;font-weight:700;
  color:var(--color-primary);
  font-family:var(--font-en);
  position:relative;z-index:1;
  transition:all .3s var(--ease);
}
.process-step:hover .process-num{
  background:var(--color-primary);color:#fff;
  border-color:var(--color-primary);
  transform:scale(1.05);
}
.process-title{
  font-size:16px;font-weight:600;
  margin-bottom:10px;
}
.process-desc{
  font-size:13px;color:var(--color-gray-4);
  line-height:1.7;
}

/* ===== 行业方案 ===== */
.solutions-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.solution-card{
  position:relative;
  aspect-ratio:3/4;
  overflow:hidden;
  cursor:pointer;
  display:flex;align-items:flex-end;
  color:#fff;
  transition:transform .4s var(--ease);
}
.solution-card:hover{transform:translateY(-6px)}
.solution-overlay{
  position:absolute;inset:0;
  transition:all .5s var(--ease);
}
.solution-trade .solution-overlay{
  background:linear-gradient(135deg, #8B1A1A 0%, #4A0E0E 100%);
}
.solution-ecom .solution-overlay{
  background:linear-gradient(135deg, #1A1A1A 0%, #2D1810 100%);
}
.solution-edu .solution-overlay{
  background:linear-gradient(135deg, #2C4A6B 0%, #0F2237 100%);
}
.solution-travel .solution-overlay{
  background:linear-gradient(135deg, #5C3317 0%, #2D1810 100%);
}
.solution-card::before{
  content:'';position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 30px, rgba(255,255,255,.03) 30px, rgba(255,255,255,.03) 60px);
  z-index:1;
}
.solution-card::after{
  content:'';position:absolute;top:20px;right:20px;
  width:40px;height:40px;
  border:1px solid rgba(255,255,255,.3);border-radius:50%;
  z-index:1;
}
.solution-content{
  position:relative;z-index:2;
  padding:32px 28px;width:100%;
}
.solution-tag{
  display:inline-block;
  font-size:11px;letter-spacing:.2em;
  padding:4px 12px;
  background:rgba(255,255,255,.15);
  border:1px solid rgba(255,255,255,.3);
  margin-bottom:16px;
  backdrop-filter:blur(8px);
}
.solution-title{
  font-size:20px;font-weight:600;
  margin-bottom:12px;line-height:1.4;
}
.solution-desc{
  font-size:13px;line-height:1.7;
  color:rgba(255,255,255,.85);
}
.solution-card:hover .solution-overlay{
  filter:brightness(1.15);
}

/* ===== 案例展示 ===== */
.section-cases{background:var(--color-paper)}
.cases-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.case-card{
  background:#fff;
  overflow:hidden;
  transition:all .4s var(--ease);
  border:1px solid var(--color-line);
}
.case-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}
.case-thumb{
  aspect-ratio:4/3;
  position:relative;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
}
.case-thumb::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(135deg, transparent 0%, rgba(255,255,255,.1) 50%, transparent 100%);
  transition:transform .6s var(--ease);
}
.case-card:hover .case-thumb::before{transform:translateX(100%)}
.case-thumb-1{background:linear-gradient(135deg, #8B1A1A 0%, #4A0E0E 100%)}
.case-thumb-2{background:linear-gradient(135deg, #1A1A1A 0%, #2D1810 100%)}
.case-thumb-3{background:linear-gradient(135deg, #2C4A6B 0%, #0F2237 100%)}
.case-thumb-4{background:linear-gradient(135deg, #5C3317 0%, #2D1810 100%)}
.case-jp{
  font-family:var(--font-jp);
  font-size:18px;font-weight:500;
  color:rgba(255,255,255,.95);
  text-align:center;padding:0 20px;
  position:relative;z-index:1;
  letter-spacing:.05em;
}
.case-info{padding:24px 20px}
.case-tag{
  display:inline-block;
  font-size:11px;color:var(--color-primary);
  border:1px solid var(--color-primary);
  padding:2px 10px;margin-bottom:12px;
  letter-spacing:.1em;
}
.case-title{
  font-size:16px;font-weight:600;
  margin-bottom:8px;line-height:1.5;
}
.case-desc{
  font-size:13px;color:var(--color-gray-4);
  line-height:1.7;
}

/* ===== FAQ ===== */
.faq-list{
  max-width:960px;margin:0 auto;
}
.faq-item{
  background:#fff;
  border:1px solid var(--color-line);
  border-left:3px solid var(--color-primary);
  margin-bottom:12px;
  transition:all .3s var(--ease);
}
.faq-item[open]{
  box-shadow:var(--shadow-md);
  border-left-color:var(--color-primary);
}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;
  padding:24px 32px;
  cursor:pointer;
  list-style:none;
  user-select:none;
  transition:background .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--color-paper)}
.faq-q{
  font-size:16px;font-weight:600;
  color:var(--color-ink);
  line-height:1.5;flex:1;
}
.faq-icon{
  width:24px;height:24px;
  position:relative;flex-shrink:0;
  transition:transform .3s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:'';position:absolute;
  left:50%;top:50%;
  background:var(--color-primary);
  transform:translate(-50%,-50%);
  transition:all .3s var(--ease);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item[open] .faq-icon::after{
  transform:translate(-50%,-50%) scaleY(0);
}
.faq-a{
  padding:0 32px 24px;
  color:var(--color-gray-4);
  font-size:15px;line-height:1.9;
  animation:faqOpen .4s var(--ease-out);
}
.faq-a p{color:var(--color-gray-4)}
@keyframes faqOpen{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:translateY(0)}
}

/* ===== 关于铭赞 ===== */
.section-about{background:var(--color-ink);color:#fff}
.section-about .section-eyebrow{color:var(--color-gold-light)}
.section-about .section-title{color:#fff}
.about-grid{
  display:grid;grid-template-columns:1.2fr .8fr;
  gap:80px;align-items:center;
}
.about-lead{
  font-size:18px;line-height:1.9;
  color:rgba(255,255,255,.85);
  margin-bottom:24px;
  padding-left:16px;border-left:2px solid var(--color-primary);
}
.about-para{
  font-size:15px;line-height:1.9;
  color:rgba(255,255,255,.7);
  margin-bottom:16px;
}
.about-certs{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:24px;margin-top:40px;
  padding-top:40px;border-top:1px solid rgba(255,255,255,.1);
}
.cert-num{
  display:block;font-size:32px;font-weight:700;
  color:var(--color-gold-light);
  font-family:var(--font-en);
}
.cert-lbl{
  display:block;margin-top:8px;
  font-size:13px;color:rgba(255,255,255,.6);
  letter-spacing:.05em;
}
.about-visual{position:relative;height:480px}
.about-card{
  position:relative;height:100%;
  background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding:48px 40px;color:#fff;
  display:flex;flex-direction:column;justify-content:center;
  border-radius:var(--radius-md);
  overflow:hidden;
}
.about-card::before{
  content:'';position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 30px, rgba(255,255,255,.05) 30px, rgba(255,255,255,.05) 60px);
}
.about-card::after{
  content:'';position:absolute;top:-50%;right:-30%;
  width:300px;height:300px;
  background:radial-gradient(circle, rgba(255,255,255,.1) 0%, transparent 70%);
  border-radius:50%;
}
.about-card-jp{
  position:absolute;top:24px;right:32px;
  font-family:var(--font-jp);font-size:14px;
  color:rgba(255,255,255,.4);
  letter-spacing:.2em;z-index:1;
}
.about-card-title{
  position:relative;z-index:1;
  font-family:var(--font-jp);font-size:36px;
  font-weight:600;line-height:1.3;
  margin-bottom:32px;
}
.about-card-sub{
  position:relative;z-index:1;
  font-family:var(--font-jp);font-size:14px;
  color:rgba(255,255,255,.7);
  margin-bottom:24px;
}
.about-card-list{
  position:relative;z-index:1;
  font-size:14px;line-height:2;
}
.about-card-list li{color:rgba(255,255,255,.9)}

/* ===== 联系方式 ===== */
.contact-grid{
  display:grid;grid-template-columns:1.2fr .8fr;
  gap:60px;align-items:start;
}
.contact-info{
  display:grid;grid-template-columns:1fr 1fr;
  gap:16px;
}
.contact-card{
  display:flex;align-items:flex-start;gap:16px;
  padding:24px;
  background:#fff;
  border:1px solid var(--color-line);
  transition:all .3s var(--ease);
  color:var(--color-ink);
}
.contact-card:hover{
  border-color:var(--color-primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
}
.contact-icon{
  width:44px;height:44px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--color-paper);
  color:var(--color-primary);
  border-radius:50%;
}
.contact-icon svg{width:20px;height:20px}
.contact-body{flex:1;min-width:0}
.contact-label{
  font-size:13px;color:var(--color-gray-4);
  margin-bottom:6px;
  font-weight:500;
}
.contact-value{
  display:block;font-size:18px;font-weight:600;
  color:var(--color-ink);
  line-height:1.4;word-break:break-all;
}
a.contact-value:hover{color:var(--color-primary)}
.contact-tip{
  font-size:12px;color:var(--color-gray-3);
  margin-top:4px;
}
.contact-card-weibo .contact-icon{color:#E6162D}
.contact-card-weibo:hover{border-color:#E6162D}

.contact-qr{display:flex;justify-content:center}
.qr-card{
  background:#fff;
  padding:32px;
  border:1px solid var(--color-line);
  text-align:center;
  box-shadow:var(--shadow-md);
}
.qr-tip{
  font-size:14px;font-weight:500;
  color:var(--color-primary);
  margin-bottom:16px;
  letter-spacing:.1em;
}
.qr-img{
  width:240px;height:240px;
  margin:0 auto;
  display:block;
  border:1px solid var(--color-line);
}
.qr-phone{
  margin-top:16px;font-size:18px;
  font-weight:600;color:var(--color-ink);
  font-family:var(--font-en);
}
.qr-note{
  margin-top:8px;font-size:12px;
  color:var(--color-gray-4);
}

/* ===== 页脚 ===== */
.footer{background:#0a0a0a;color:rgba(255,255,255,.7);font-size:13px}
.footer-top{padding:80px 0 60px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-col-brand .logo{
  margin-bottom:20px;
}
.footer-intro{
  font-size:13px;line-height:1.9;
  color:rgba(255,255,255,.6);
  margin-bottom:20px;
}
.footer-meta{
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-title{
  font-size:14px;font-weight:600;
  color:#fff;margin-bottom:20px;
  position:relative;padding-bottom:12px;
}
.footer-title::after{
  content:'';position:absolute;
  bottom:0;left:0;width:24px;height:1px;
  background:var(--color-primary);
}
.footer-list{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px}
.footer-list li a{
  font-size:13px;color:rgba(255,255,255,.55);
  display:inline-block;
  padding:3px 0;
  transition:color .2s var(--ease);
}
.footer-list li a:hover{color:var(--color-primary-light)}
.footer-bottom{padding:24px 0;text-align:center}
.copyright{
  font-size:12px;color:rgba(255,255,255,.4);
  line-height:1.8;
}
.copyright a{color:rgba(255,255,255,.6)}
.copyright a:hover{color:var(--color-primary-light)}

/* ===== 返回顶部 ===== */
.back-to-top{
  position:fixed;right:24px;bottom:24px;
  width:44px;height:44px;
  background:var(--color-primary);color:#fff;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;
  transform:translateY(20px);
  transition:all .3s var(--ease);
  z-index:99;
}
.back-to-top.visible{
  opacity:1;visibility:visible;
  transform:translateY(0);
}
.back-to-top:hover{background:var(--color-primary-dark);transform:translateY(-2px)}
.back-to-top svg{width:20px;height:20px}

/* ===== 滚动动画 ===== */
[data-anim]{opacity:0;transition:all .8s var(--ease-out)}
[data-anim="fade-up"]{transform:translateY(40px)}
[data-anim="fade-down"]{transform:translateY(-40px)}
[data-anim="fade-left"]{transform:translateX(40px)}
[data-anim="fade-right"]{transform:translateX(-40px)}
[data-anim].is-visible{
  opacity:1;transform:translate(0,0);
}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{height:380px;max-width:480px;margin:0 auto}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .advantages-grid{grid-template-columns:repeat(2,1fr);gap:40px}
  .process-timeline{grid-template-columns:repeat(3,1fr);gap:32px 16px}
  .process-timeline::before{display:none}
  .solutions-grid{grid-template-columns:repeat(2,1fr)}
  .cases-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr;gap:32px}
  .footer-col:nth-child(4){grid-column:1/-1;border-top:1px solid rgba(255,255,255,.06);padding-top:32px}
}

@media (max-width:768px){
  .section{padding:80px 0}
  .container{padding:0 20px}
  .nav-container{padding:0 20px}
  .nav-toggle{display:flex}
  .nav-menu{
    position:absolute;top:100%;left:0;right:0;
    background:rgba(10,10,10,.98);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    flex-direction:column;align-items:stretch;
    padding:20px;
    gap:0;
    display:none;
  }
  .nav-menu.open{display:flex}
  .nav-menu li a{
    padding:14px 16px;
    text-align:center;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .nav-menu li:last-child a{border-bottom:none}
  .nav-menu li a.nav-cta{margin:8px 0 0}
  .logo{font-size:16px}
  .logo-slogan{font-size:14px}
  .logo-divider{margin:0 4px}
  .hero-content{padding:40px 0 80px}
  .hero-title{font-size:36px}
  .hero-title-jp{font-size:20px}
  .hero-subtitle{font-size:15px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-visual{height:340px}
  .hero-card-main{max-width:300px}
  .hero-card-sub{width:200px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item::after{display:none}
  .stat-item:nth-child(odd){border-right:1px solid var(--color-line)}
  .services-grid{grid-template-columns:1fr}
  .advantages-grid{grid-template-columns:1fr;gap:32px}
  .process-timeline{grid-template-columns:repeat(2,1fr);gap:24px}
  .solutions-grid{grid-template-columns:1fr}
  .solution-card{aspect-ratio:5/3}
  .cases-grid{grid-template-columns:1fr}
  .section-faq .container{padding:0 16px}
  .faq-item summary{padding:18px 20px}
  .faq-q{font-size:15px}
  .faq-a{padding:0 20px 20px;font-size:14px}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-certs{grid-template-columns:repeat(2,1fr);gap:16px}
  .about-visual{height:380px}
  .about-card-title{font-size:28px}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .contact-info{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-col:nth-child(4){grid-column:auto;border-top:1px solid rgba(255,255,255,.06);padding-top:32px}
  .footer-list{grid-template-columns:1fr 1fr}
  .back-to-top{right:16px;bottom:16px;width:40px;height:40px}
  .hero-scroll{bottom:60px}
}

@media (max-width:480px){
  .hero-title{font-size:30px}
  .stats-grid{grid-template-columns:1fr}
  .stat-item:nth-child(odd){border-right:none}
  .stat-item{border-bottom:1px solid var(--color-line);padding:32px 16px}
  .stat-item:last-child{border-bottom:none}
  .process-timeline{grid-template-columns:1fr}
  .footer-list{grid-template-columns:1fr}
  .hero-card-main{max-width:280px}
  .hero-card-sub{width:180px}
  .about-card{padding:32px 24px}
  .about-card-title{font-size:24px}
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    transition-duration:.01ms!important;
  }
  html{scroll-behavior:auto}
}

/* ===== 打印样式 ===== */
@media print{
  .navbar,.back-to-top,.hero-bg,.hero-scroll,.hero-keywords{display:none}
  .hero{min-height:auto;background:#fff;color:#000;padding:40px 0}
  .hero-title,.hero-subtitle,.hero-trust{color:#000}
  .section{page-break-inside:avoid}
}