/* ============================================================
   l189.com 壹捌玖网络科技 全站公共样式 common.css
   设计语言：时尚潮流 · 浅咖 #C9A87C + 亮黑 #141414 + 纯白 #FFFFFF
   本文件负责：设计变量 / 基础排版 / 按钮 / 顶栏 / 导航 / 页脚 /
   滚动渐入动画 / 视差 / 通用工具类 / 响应式（导航与页脚部分）
   页面个性样式一律写入各页面自己的 css（如 index.css、service.css）
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --coffee:#C9A87C;            /* 浅咖主色 */
  --coffee-deep:#A98859;       /* 深咖 */
  --coffee-bright:#DFC69B;     /* 亮咖 */
  --coffee-bg:#F6F0E6;         /* 浅咖背景 */
  --coffee-bg-2:#EFE5D3;       /* 略深浅咖背景 */
  --ink:#141414;               /* 亮黑主色 */
  --ink-2:#1E1C1A;             /* 暖黑 */
  --ink-3:#2B2824;             /* 次级黑 */
  --white:#FFFFFF;
  --text:#2A2622;              /* 正文暖深灰 */
  --text-2:#746C60;            /* 次要文字 */
  --line:#E8DECC;              /* 分隔线 */
  --grad-coffee:linear-gradient(135deg,#D9B98B 0%,#B99260 100%);
  --grad-ink:linear-gradient(135deg,#23201C 0%,#141414 100%);
  --shadow-sm:0 4px 18px rgba(20,20,20,.08);
  --shadow-md:0 12px 40px rgba(20,20,20,.12);
  --shadow-lg:0 24px 70px rgba(20,20,20,.18);
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:28px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Helvetica Neue",Arial,sans-serif;
  --nav-h:76px;
  --topbar-h:38px;
}

/* ---------- 基础重置 ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .3s ease}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{font-weight:800;line-height:1.25;color:var(--ink);letter-spacing:-.01em}
::selection{background:var(--coffee);color:#fff}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--coffee-deep),var(--coffee));border-radius:8px}
::-webkit-scrollbar-track{background:#F3EDE3}

/* 页面载入过渡 */
body.page-ready{animation:pageIn .55s ease both}
@keyframes pageIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- 布局工具 ---------- */
.container{width:100%;max-width:1220px;margin:0 auto;padding:0 24px}
.section{padding:110px 0;position:relative}
.section-tight{padding:70px 0}
.section-dark{background:var(--ink);color:#E9E2D6}
.section-dark h1,.section-dark h2,.section-dark h3{color:#fff}
.section-coffee{background:var(--coffee-bg)}
.section-white{background:#fff}
.grid{display:grid;gap:28px}
.text-center{text-align:center}

/* 区块标题体系（各页可覆盖配色与排版，但骨架统一保证全站一致节奏） */
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.22em;color:var(--coffee-deep);
  text-transform:uppercase;margin-bottom:16px;
}
.sec-eyebrow::before{content:"";width:26px;height:2px;background:var(--grad-coffee);border-radius:2px}
.sec-title{font-size:clamp(28px,4vw,44px);font-weight:900;line-height:1.2;margin-bottom:18px}
.sec-lead{font-size:16px;color:var(--text-2);max-width:640px;line-height:1.9}
.section-dark .sec-eyebrow{color:var(--coffee-bright)}
.section-dark .sec-lead{color:#B7AE9E}
.sec-head{margin-bottom:52px}
.sec-head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 34px;border-radius:100px;
  font-size:15px;font-weight:700;letter-spacing:.04em;white-space:nowrap;
  background:var(--ink);color:#fff;
  box-shadow:0 10px 26px rgba(20,20,20,.22);
  transition:all .35s cubic-bezier(.22,.68,.4,1);
  position:relative;overflow:hidden;
}
.btn::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(255,255,255,.16),transparent 45%);
  opacity:0;transition:opacity .35s;
}
.btn:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(20,20,20,.3);color:#fff}
.btn:hover::after{opacity:1}
.btn svg{width:17px;height:17px;transition:transform .35s}
.btn:hover svg{transform:translateX(4px)}
.btn-coffee{background:var(--grad-coffee);color:#fff;box-shadow:0 10px 26px rgba(169,136,89,.35)}
.btn-coffee:hover{box-shadow:0 18px 40px rgba(169,136,89,.5)}
.btn-outline{background:transparent;color:var(--ink);box-shadow:none;border:2px solid var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff;transform:translateY(-3px)}
.btn-outline.on-dark{color:#fff;border-color:rgba(255,255,255,.6)}
.btn-outline.on-dark:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-light{background:#fff;color:var(--ink);box-shadow:0 10px 26px rgba(0,0,0,.15)}
.btn-light:hover{color:var(--ink);box-shadow:0 18px 40px rgba(0,0,0,.22)}
.btn-lg{padding:17px 44px;font-size:16px}
.btn-sm{padding:9px 22px;font-size:13px}
.btn-tel{display:inline-flex;align-items:center;gap:12px;font-weight:900;font-size:clamp(18px,2.4vw,26px)}
.btn-tel svg{width:26px;height:26px;color:var(--coffee)}

/* ---------- 顶栏（全站统一，联系方式最显眼处） ---------- */
.topbar{
  position:relative;z-index:60;height:var(--topbar-h);
  background:var(--ink);color:#CFC7B8;font-size:13px;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.topbar-left{display:flex;align-items:center;gap:8px;white-space:nowrap}
.topbar-left svg{width:15px;height:15px;color:var(--coffee)}
.topbar-right{display:flex;align-items:center;gap:26px;font-weight:600;white-space:nowrap}
.topbar-right a{display:inline-flex;align-items:center;gap:8px;color:#E9E2D6;transition:color .3s;white-space:nowrap}
.topbar-right a:hover{color:var(--coffee-bright)}
.topbar-right a svg{width:15px;height:15px;color:var(--coffee)}
.topbar-right .tb-tel{color:#fff;font-weight:800;font-size:14px;letter-spacing:.03em}
.topbar-right .tb-tel svg{color:var(--coffee-bright)}
@media (max-width:860px){
  .topbar-left{display:none}
  .topbar-right{gap:16px}
}

/* ---------- 主导航（全站统一） ---------- */
.site-header{
  position:fixed;top:0;left:0;width:100%;z-index:99;
  transition:background .4s ease,box-shadow .4s ease;
  background:linear-gradient(180deg,rgba(20,20,20,.5),rgba(20,20,20,.12));
}
.site-header .topbar{background:rgba(20,20,20,.9);backdrop-filter:blur(6px)}
.site-header.scrolled{background:rgba(20,20,20,.97);box-shadow:0 8px 34px rgba(0,0,0,.35);backdrop-filter:blur(14px)}
.site-header.scrolled .topbar{background:var(--ink)}
.main-nav{height:var(--nav-h);position:relative}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:flex;align-items:center;gap:12px;white-space:nowrap}
.brand img{height:46px;width:auto;object-fit:contain;flex-shrink:0}
.brand-name{display:flex;flex-direction:column;line-height:1.1;white-space:nowrap}
.brand-name b{font-size:21px;font-weight:900;color:#fff;letter-spacing:.06em;white-space:nowrap}
.brand-name span{font-size:11px;color:var(--coffee-bright);letter-spacing:.3em;margin-top:2px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links>li{position:relative}
.nav-links>li>a{
  display:flex;align-items:center;gap:6px;
  padding:12px 16px;font-size:15px;font-weight:600;color:#F1EBE1;border-radius:8px;
  transition:color .3s,background .3s;
  white-space:nowrap;
}
.nav-links>li>a:hover,.nav-links>li>a.active{color:#fff;background:rgba(255,255,255,.12)}
.nav-links>li>a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:6px;height:2px;background:var(--grad-coffee);border-radius:2px}
.nav-links .caret{width:11px;height:11px;transition:transform .3s}
.nav-links li:hover>.caret,.nav-links li:focus-within>.caret{transform:rotate(180deg)}
/* 下拉面板 */
.dropdown{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(12px);
  min-width:230px;background:#fff;border-radius:var(--radius-md);
  box-shadow:var(--shadow-lg);padding:12px;
  opacity:0;visibility:hidden;transition:all .32s cubic-bezier(.22,.68,.4,1);
  z-index:80;
}
.dropdown::before{content:"";position:absolute;top:-10px;left:0;right:0;height:10px}
.dropdown a{
  display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:10px;
  font-size:14px;color:var(--text);font-weight:600;white-space:nowrap;
}
.dropdown a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--coffee);opacity:.55;transition:all .3s}
.dropdown a:hover{background:var(--coffee-bg);color:var(--ink)}
.dropdown a:hover::before{opacity:1;transform:scale(1.6);background:var(--coffee-deep)}
.dropdown .dd-title{
  padding:8px 14px;font-size:12px;font-weight:800;letter-spacing:.18em;
  color:var(--coffee-deep);text-transform:uppercase;white-space:nowrap;
}
/* 宽下拉（两列网格，用于服务/行业聚合） */
.dropdown.wide{min-width:560px;display:grid;grid-template-columns:repeat(2,1fr);gap:2px;padding:14px}
.dropdown.wide .dd-title{grid-column:1/-1;padding:4px 12px 8px}
.dropdown.wide .dd-more{
  grid-column:1/-1;margin-top:6px;border-top:1px solid var(--line);
  padding:10px 12px 4px;font-size:13px;font-weight:800;color:var(--coffee-deep);white-space:nowrap;
}
@media (max-width:620px){
  .dropdown.wide{min-width:300px;grid-template-columns:1fr}
}
.nav-links li:hover .dropdown,.nav-links li:focus-within .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
/* 导航 CTA */
.nav-cta{margin-left:14px}
.nav-cta .btn{padding:11px 26px;font-size:14px}

/* 汉堡按钮 */
.hamburger{
  display:none;width:44px;height:44px;border-radius:10px;
  position:relative;z-index:120;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .35s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动端抽屉导航 */
.mobile-drawer{
  position:fixed;top:0;right:0;width:min(420px,86vw);height:100vh;z-index:110;
  background:var(--ink);color:#fff;transform:translateX(105%);transition:transform .45s cubic-bezier(.22,.68,.4,1);
  display:flex;flex-direction:column;padding:92px 28px 34px;overflow-y:auto;
}
.mobile-drawer.open{transform:none;box-shadow:-24px 0 70px rgba(0,0,0,.5)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,20,20,.55);z-index:105;
  opacity:0;visibility:hidden;transition:all .4s;backdrop-filter:blur(3px);
}
.drawer-mask.open{opacity:1;visibility:visible}
.mobile-drawer .md-group{margin-bottom:26px}
.mobile-drawer .md-group>h4{color:var(--coffee-bright);font-size:12px;letter-spacing:.24em;text-transform:uppercase;margin-bottom:12px;font-weight:800}
.mobile-drawer .md-group a{
  display:block;padding:11px 0;color:#EDE6DA;font-size:16px;font-weight:600;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-drawer .md-group a:hover{color:var(--coffee-bright)}
.mobile-drawer .md-contact{margin-top:8px;padding:18px;border-radius:16px;background:rgba(255,255,255,.06)}
.mobile-drawer .md-contact p{display:flex;align-items:center;gap:10px;font-size:15px;color:#EDE6DA;margin-bottom:8px}
.mobile-drawer .md-contact svg{width:17px;height:17px;color:var(--coffee)}
.mobile-drawer .md-contact b{font-size:19px;color:#fff;letter-spacing:.04em}

/* ---------- 页脚（全站统一） ---------- */
.site-footer{background:var(--ink);color:#B7AE9E;position:relative;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--coffee),transparent);
}
.footer-top{padding:78px 0 54px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:44px}
.footer-brand img{height:52px;width:auto;object-fit:contain;margin-bottom:18px}
.footer-brand p{font-size:14px;line-height:1.9;max-width:330px}
.footer-col h4{
  color:#fff;font-size:15px;font-weight:800;margin-bottom:22px;
  display:flex;align-items:center;gap:10px;
}
.footer-col h4::before{content:"";width:18px;height:2px;background:var(--grad-coffee);border-radius:2px}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:#B7AE9E;display:inline-flex;align-items:center;gap:8px;transition:all .3s}
.footer-col a::before{content:"›";color:var(--coffee);font-weight:700;opacity:.8}
.footer-col a:hover{color:#fff;transform:translateX(4px)}
.footer-contact li{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px;font-size:14px;line-height:1.7}
.footer-contact svg{width:18px;height:18px;color:var(--coffee);flex-shrink:0;margin-top:3px}
.footer-contact b{color:#fff;font-size:22px;letter-spacing:.03em}
.footer-contact .fc-tel{display:block;color:#fff;font-weight:800;font-size:20px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;font-size:13px;color:#8F8678;
}
.footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom a{color:#B7AE9E}
.footer-bottom a:hover{color:#fff}
.footer-icp{color:#9A9082;display:inline-flex;align-items:center;gap:6px}
.footer-icp a{color:#9A9082}
.footer-icp a:hover{color:#fff}
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:600px){
  .footer-top{grid-template-columns:1fr;gap:30px}
  .footer-bottom-inner{flex-direction:column;text-align:center}
}

/* ---------- 回顶按钮 ---------- */
.to-top{
  position:fixed;right:26px;bottom:30px;z-index:90;
  width:50px;height:50px;border-radius:50%;
  background:var(--grad-ink);color:var(--coffee-bright);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 12px 34px rgba(0,0,0,.35);
  opacity:0;visibility:hidden;transform:translateY(16px);
  transition:all .4s cubic-bezier(.22,.68,.4,1);
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top svg{width:20px;height:20px}
.to-top:hover{background:var(--grad-coffee);color:#fff}

/* ---------- 滚动渐入动画（JS 控制 .in 状态） ---------- */
.reveal{opacity:0;transform:translateY(42px);transition:opacity .8s cubic-bezier(.22,.68,.4,1),transform .8s cubic-bezier(.22,.68,.4,1)}
.reveal.in{opacity:1;transform:none}
.reveal-left{opacity:0;transform:translateX(-56px);transition:all .85s cubic-bezier(.22,.68,.4,1)}
.reveal-left.in{opacity:1;transform:none}
.reveal-right{opacity:0;transform:translateX(56px);transition:all .85s cubic-bezier(.22,.68,.4,1)}
.reveal-right.in{opacity:1;transform:none}
.reveal-zoom{opacity:0;transform:scale(.9);transition:all .85s cubic-bezier(.22,.68,.4,1)}
.reveal-zoom.in{opacity:1;transform:none}
.d1{transition-delay:.12s}.d2{transition-delay:.24s}.d3{transition-delay:.36s}
.d4{transition-delay:.48s}.d5{transition-delay:.6s}.d6{transition-delay:.72s}

/* ---------- 视差辅助（背景图视差，JS 驱动 transform） ---------- */
.parallax-bg{
  position:absolute;inset:-12% 0;background-size:cover;background-position:center;
  will-change:transform;z-index:0;
}
@media (prefers-reduced-motion:reduce){
  .reveal,.reveal-left,.reveal-right,.reveal-zoom{opacity:1;transform:none;transition:none}
  .parallax-bg{inset:0}
  html{scroll-behavior:auto}
}

/* ---------- 通用小件 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:100px;
  background:var(--coffee-bg);color:var(--coffee-deep);font-size:13px;font-weight:700;
}
.badge svg{width:14px;height:14px}
.divider-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--coffee);margin:0 10px}
.link-more{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:14px;color:var(--ink)}
.link-more svg{width:16px;height:16px;transition:transform .3s}
.link-more:hover{color:var(--coffee-deep)}
.link-more:hover svg{transform:translateX(5px)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  box-shadow:var(--shadow-sm);transition:all .4s cubic-bezier(.22,.68,.4,1);
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}

/* ---------- 导航与页脚响应式 ---------- */
/* 防导航折行：中等宽度收紧品牌与导航项，避免 10 项链接被压缩换行 */
@media (max-width:1320px){
  .brand img{height:40px}
  .brand-name b{font-size:18px}
  .brand-name span{font-size:10px;letter-spacing:.15em}
  .nav-links{gap:0}
  .nav-links>li>a{padding:10px 12px;font-size:14px}
  .nav-cta{margin-left:6px}
  .nav-cta .btn{padding:9px 16px;font-size:13px}
}
@media (max-width:1180px){
  .nav-links>li>a{padding:9px 10px;font-size:14px}
  .nav-cta{margin-left:4px}
  .nav-cta .btn{padding:8px 14px;font-size:13px}
}
@media (max-width:1024px){
  :root{--nav-h:66px}
  .nav-links,.nav-cta{display:none}
  .hamburger{display:flex}
  .brand img{height:40px}
  .brand-name b{font-size:18px}
}
@media (max-width:640px){
  .section{padding:76px 0}
  .sec-head{margin-bottom:36px}
}