@charset "UTF-8";
/* ==========================================================================
   华博会门户网站 · 公共样式表
   路径说明：本文件位于 assets/css/，引用图片请使用 ../img/xxx.jpg
   ========================================================================== */

:root{
  --red:#A61B29; --red-dark:#7E1420; --red-deep:#5C0E16;
  --gold:#C9A252; --gold-light:#E3C888;
  --ink:#211D18; --muted:#6B635A;
  --paper:#FAF7F2; --card:#FFFFFF; --line:#E8E0D4;
  --serif:"Songti SC","STSong","Noto Serif SC","SimSun",serif;
  --navh:72px;
  --tabh:62px;          /* 内页小节 Tab 的高度，由脚本精确测量后覆盖 */
  --sec-pad:clamp(52px,8vw,88px);
  --gap:clamp(14px,1.6vw,26px);
  --h1:clamp(26px,5vw,46px);
  --h2:clamp(22px,3.2vw,34px);
  --h3:clamp(18px,2.1vw,22px);
  --r:10px;
}
*{margin:0;padding:0;box-sizing:border-box}
/* overflow-x 放在 html 上：避免 body 成为滚动容器而破坏 iOS 吸顶导航 */
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--paper);line-height:1.75;font-size:clamp(16px,1.05vw,17px);
  -webkit-tap-highlight-color:transparent}
body.nav-open{overflow:hidden}
h1,h2,h3,h4,.serif{font-family:var(--serif)}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 clamp(18px,4vw,24px)}
section{padding:var(--sec-pad) 0}
section[id],#top,[id]{scroll-margin-top:calc(var(--navh) + 16px)}
/* 有吸顶 Tab 的页面：定位偏移要把吸顶 Tab 自身的高度算进去，
   否则点击 Tab 后小节标题会被吸顶条压住 */
.has-tabs [id]{scroll-margin-top:calc(var(--navh) + var(--tabh) + 14px)}
.skip{position:absolute;left:-9999px;top:0;background:var(--red);color:#fff;padding:10px 18px;z-index:999}
.skip:focus{left:8px;top:8px}
.sec-tag{display:inline-flex;align-items:center;gap:10px;color:var(--red);font-size:clamp(12px,1.4vw,14px);letter-spacing:4px;margin-bottom:14px}
.sec-tag::before,.sec-tag::after{content:"";width:26px;height:1px;background:var(--gold)}
.sec-title{font-size:var(--h2);letter-spacing:2px;margin-bottom:14px;line-height:1.4}
.sec-sub{color:var(--muted);max-width:760px}
.center{text-align:center}
.center .sec-sub{margin:0 auto}

/* ===== 顶栏 ===== */
.topbar{background:var(--red-deep);color:#EAD9C2;font-size:13px;padding:7px 0}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px}
.topbar b{color:var(--gold-light);font-family:var(--serif);letter-spacing:1px}
.topbar a{color:var(--gold-light)}

/* ===== 头部 + 导航 ===== */
/* 注意：backdrop-filter 会让 fixed 子元素（移动端抽屉菜单）以 header 为定位基准，
   因此只在桌面端启用毛玻璃，移动端使用实底白，保证抽屉全屏高度正确 */
header{position:sticky;top:0;z-index:120;background:#fff;border-bottom:1px solid var(--line)}
@media (min-width:901px){
  header{background:rgba(255,255,255,.94);backdrop-filter:blur(12px)}
}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--navh);gap:16px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{width:clamp(42px,5vw,52px);height:auto;border-radius:50%;box-shadow:0 2px 10px rgba(166,27,41,.25)}
.brand .name{font-family:var(--serif);font-size:clamp(18px,2.2vw,21px);letter-spacing:3px;color:var(--red);font-weight:700;line-height:1.2}
.brand .en{font-size:11px;color:var(--muted);letter-spacing:1.5px}
nav ul{display:flex;gap:2px;list-style:none;align-items:center}
nav a{display:block;padding:9px 12px;font-size:15px;color:var(--ink);border-radius:6px;transition:.2s;white-space:nowrap}
nav a:hover,nav a.active{color:var(--red);background:rgba(166,27,41,.06)}
nav a.active{font-weight:600}
.nav-cta{background:var(--red);color:#fff !important;padding:10px 18px !important;border-radius:24px !important}
.nav-cta:hover{background:var(--red-dark)}
#menuBtn{display:none;background:none;border:0;width:44px;height:44px;position:relative;flex:none}
#menuBtn span{position:absolute;left:10px;right:10px;height:2px;background:var(--red);border-radius:2px;transition:.25s}
#menuBtn span:nth-child(1){top:15px}
#menuBtn span:nth-child(2){top:21.5px}
#menuBtn span:nth-child(3){top:28px}
.nav-close{display:none}
.nav-mask{position:fixed;inset:0;background:rgba(20,14,10,.5);opacity:0;visibility:hidden;transition:.3s;z-index:110}

/* ===== 首屏（首页） ===== */
.hero{position:relative;display:flex;align-items:center;color:#fff;padding:0;
  min-height:min(720px,86vh);
  background:#14100c url("../img/hero.jpg?v=e0b5fac1") center right/cover no-repeat}
.hero::before{content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(16,11,8,.92) 0%,rgba(16,11,8,.76) 42%,rgba(16,11,8,.24) 74%,rgba(16,11,8,.5) 100%)}
.hero .wrap{position:relative;padding-top:clamp(48px,7vw,74px);padding-bottom:clamp(48px,7vw,74px);width:100%}
.hero .badge{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(227,200,136,.55);color:var(--gold-light);
  font-size:clamp(12px,1.4vw,14px);letter-spacing:2px;padding:6px 16px;border-radius:24px;margin-bottom:22px}
.hero h1{font-size:var(--h1);line-height:1.38;letter-spacing:2px;max-width:680px}
.hero h1 span{color:var(--gold-light)}
.hero p.lead{margin-top:18px;font-size:clamp(15px,1.6vw,18px);color:#E7DDCE;max-width:560px}
.hero .btns{margin-top:clamp(26px,4vw,36px);display:flex;gap:14px;flex-wrap:wrap}
.chips{margin-top:clamp(30px,4vw,42px);display:flex;flex-wrap:wrap;gap:8px;max-width:640px}
.chips span{border:1px solid rgba(227,200,136,.4);background:rgba(20,14,10,.45);color:#EAD9C2;
  font-size:13px;letter-spacing:1px;padding:6px 14px;border-radius:4px}
.chips .t{color:var(--gold-light);border:none;background:none;padding-left:0;font-family:var(--serif)}

/* ===== 内页页头 ===== */
.page-hero{position:relative;color:#fff;padding:0;
  background:linear-gradient(115deg,#3A2118 0%,#5C0E16 55%,#7E1420 100%)}
.page-hero::after{content:"";position:absolute;inset:0;opacity:.28;
  background:
    radial-gradient(circle at 82% 20%,rgba(227,200,136,.30),transparent 42%),
    radial-gradient(circle at 12% 88%,rgba(201,162,82,.22),transparent 46%)}
.page-hero .wrap{position:relative;z-index:2;padding-top:clamp(38px,5vw,58px);padding-bottom:clamp(34px,4.6vw,52px)}
.page-hero h1{font-size:clamp(24px,3.6vw,38px);letter-spacing:3px;line-height:1.35}
.page-hero p{margin-top:12px;color:#E4D6C0;font-size:clamp(14px,1.5vw,16.5px);max-width:760px}
.crumb{margin-top:18px;font-size:13.5px;color:#C6B49B;letter-spacing:1px}
.crumb a:hover{color:#fff}
.crumb span{margin:0 8px;color:rgba(227,200,136,.6)}

/* ===== 通用按钮 ===== */
.btn{display:inline-block;padding:13px 32px;border-radius:28px;font-size:clamp(15px,1.5vw,16px);letter-spacing:2px;transition:.2s;text-align:center}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 6px 20px rgba(166,27,41,.45)}
.btn-primary:hover{background:var(--red-dark);transform:translateY(-2px)}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-line{border:1px solid var(--red);color:var(--red)}
.btn-line:hover{background:var(--red);color:#fff}

/* ===== 数据条 ===== */
.trust{position:relative;z-index:5;margin-top:-46px}
.trust-in{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  box-shadow:0 20px 46px rgba(33,29,24,.12);display:grid;grid-template-columns:repeat(4,1fr)}
.trust-in .ti{padding:clamp(20px,2.6vw,30px) 18px;text-align:center;border-right:1px solid var(--line)}
.trust-in .ti:last-child{border-right:0}
.trust-in .n{font-family:var(--serif);font-size:clamp(26px,3.4vw,36px);color:var(--red);line-height:1.2}
.trust-in .n em{font-style:normal;font-size:.55em;color:var(--gold);margin-left:2px}
.trust-in .l{font-size:13.5px;color:var(--muted);margin-top:4px;letter-spacing:1px}

/* ===== 平台介绍 ===== */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(26px,4vw,56px);align-items:center;margin-top:clamp(30px,4vw,44px)}
.about-img{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:0 20px 50px rgba(33,29,24,.22)}
.about-img::after{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.35);border-radius:6px;pointer-events:none}
.about-text p{margin-bottom:16px;color:#3D3830;text-align:justify}
.about-text .motto{font-family:var(--serif);color:var(--red);font-size:clamp(16px,1.8vw,19px);letter-spacing:2px;
  border-left:3px solid var(--gold);padding-left:14px;margin:22px 0}
.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);margin-top:clamp(36px,5vw,64px)}
.adv .item{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--red);border-radius:8px;
  padding:26px 22px;text-align:center;transition:.25s}
.adv .item:hover{transform:translateY(-5px);box-shadow:0 14px 30px rgba(33,29,24,.12)}
.adv .item svg{width:44px;height:44px;margin:0 auto 12px}
.adv .item h3{font-size:18px;margin-bottom:8px;letter-spacing:1px}
.adv .item p{font-size:14px;color:var(--muted);line-height:1.7}

/* ===== 业务体系（深色块） ===== */
.biz{background:linear-gradient(180deg,#221A14,#2E221A);color:#F3EBDD}
.biz .sec-sub{color:#B8AB97}
.biz .sec-tag{color:var(--gold-light)}
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:clamp(34px,5vw,52px)}
.biz-card{position:relative;background:rgba(255,255,255,.045);border:1px solid rgba(201,162,82,.35);border-radius:var(--r);
  padding:clamp(26px,3vw,38px) clamp(22px,2.6vw,30px);transition:.25s;overflow:hidden}
.biz-card:hover{background:rgba(201,162,82,.1);transform:translateY(-6px)}
.biz-card .num{position:absolute;top:16px;right:20px;font-family:var(--serif);font-size:clamp(34px,4vw,44px);color:rgba(201,162,82,.22)}
.biz-card svg{width:50px;height:50px;margin-bottom:16px}
.biz-card h3{font-size:clamp(18px,2vw,21px);letter-spacing:1px;color:var(--gold-light);margin-bottom:10px}
.biz-card p{font-size:15px;color:#CFC3B0;line-height:1.85}

/* ===== 存证流程 ===== */
.flow-steps{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:clamp(10px,1.4vw,18px);align-items:stretch;margin-top:clamp(34px,5vw,56px)}
.flow-step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:clamp(24px,3vw,34px) clamp(20px,2.4vw,26px);text-align:center}
.flow-step .idx{width:54px;height:54px;margin:0 auto 16px;border-radius:50%;background:var(--red);color:#fff;
  font-family:var(--serif);font-size:22px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(166,27,41,.3)}
.flow-step h3{font-size:clamp(18px,2vw,20px);letter-spacing:2px;color:var(--red)}
.flow-step .tag{display:inline-block;margin-top:10px;font-size:13px;color:var(--muted);background:var(--paper);border:1px solid var(--line);padding:3px 12px;border-radius:14px}
.flow-step p{margin-top:14px;font-size:14.5px;color:#4A443C;text-align:left}
.flow-arrow{display:flex;align-items:center;color:var(--gold);font-size:24px}

/* ===== 官方体系 ===== */
.auth{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.auth-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--gap);margin-top:clamp(32px,5vw,48px)}
.auth-card{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:26px 12px;text-align:center;transition:.25s}
.auth-card:hover{border-color:var(--gold);box-shadow:0 10px 24px rgba(33,29,24,.08)}
.auth-card svg{width:42px;height:42px;margin:0 auto 12px}
.auth-card h3{font-size:16.5px;letter-spacing:1px}
.auth-card p{font-size:13px;color:var(--muted);margin-top:6px}
.auth-note{margin-top:clamp(30px,4vw,44px);background:linear-gradient(90deg,#FBF3E4,#FAF7F2);
  border:1px solid var(--gold-light);border-left:4px solid var(--gold);border-radius:8px;
  padding:clamp(20px,2.6vw,24px) clamp(20px,3vw,28px);display:flex;gap:18px;align-items:flex-start}
.auth-note svg{flex:none;width:34px;height:34px;margin-top:3px}
.auth-note h4{font-size:18px;color:var(--red);margin-bottom:6px;letter-spacing:1px}
.auth-note p{font-size:15px;color:#4A443C}

/* ===== 五大机构战略联盟 ===== */
.partner-band{background:var(--card);border-bottom:1px solid var(--line)}
.partners{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--gap);margin-top:clamp(30px,4vw,46px)}
.partner{background:linear-gradient(180deg,#FFFDF9,#FAF7F2);border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(22px,2.6vw,30px) 16px;text-align:center;transition:.25s;position:relative}
.partner:hover{border-color:var(--gold);box-shadow:0 14px 30px rgba(33,29,24,.09);transform:translateY(-4px)}
.partner .mk{width:52px;height:52px;margin:0 auto 14px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(166,27,41,.07);border:1px solid rgba(166,27,41,.18);color:var(--red);font-family:var(--serif);font-size:22px}
.partner h3{font-size:15.5px;line-height:1.5;letter-spacing:.5px;color:var(--ink)}
.partner p{font-size:12.5px;color:var(--muted);margin-top:8px;letter-spacing:1px}
.league{margin-top:clamp(28px,3.6vw,40px);text-align:center;background:linear-gradient(120deg,#2E221A,#5C0E16);
  color:#fff;border-radius:var(--r);padding:clamp(24px,3vw,34px) clamp(20px,3vw,32px)}
.league .lb{font-size:12.5px;letter-spacing:5px;color:var(--gold-light)}
.league h3{margin-top:10px;font-size:clamp(19px,2.5vw,26px);letter-spacing:2px;line-height:1.5}
.league p{margin-top:10px;color:#DCCDB6;font-size:14.5px}

/* ===== 公司资质 ===== */
.qual-grid{display:grid;grid-template-columns:1fr minmax(320px,420px);gap:clamp(26px,4vw,52px);margin-top:clamp(30px,4vw,48px);align-items:start}
.qual-list{display:grid;gap:12px}
.qual-list.cols-2{grid-template-columns:repeat(2,1fr);gap:14px}
.license-wrap{max-width:880px;margin:clamp(30px,4vw,46px) auto 0}
.qual-item{display:flex;align-items:center;gap:16px;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:16px 20px}
.qual-item .ok{flex:none;width:34px;height:34px;border-radius:50%;background:rgba(166,27,41,.08);display:flex;align-items:center;justify-content:center}
.qual-item h4{font-size:clamp(15px,1.7vw,16px);font-weight:600}
.qual-item .no{font-size:13px;color:var(--muted)}
.qual-item .no em{font-style:normal;color:var(--gold);letter-spacing:1px}
.qual-item .no b{color:var(--red);font-weight:600;letter-spacing:.5px}
.qual-note{font-size:13.5px;color:var(--muted);margin-top:4px}
.license{cursor:zoom-in;position:relative}
.license img{border-radius:8px;box-shadow:0 16px 40px rgba(33,29,24,.18);border:1px solid var(--line);width:100%}
.license figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:10px;letter-spacing:1px}
.license .zoom{position:absolute;right:10px;top:10px;background:rgba(33,29,24,.62);color:#fff;font-size:12px;
  padding:4px 10px;border-radius:14px;letter-spacing:1px}

/* ===== 小程序 ===== */
.mini{background:linear-gradient(120deg,var(--red-deep),var(--red-dark));color:#fff}
.mini-grid{display:grid;grid-template-columns:1fr auto;gap:clamp(28px,5vw,60px);align-items:center}
.mini h2{color:#fff}
.mini .sec-tag{color:var(--gold-light)}
.mini .sec-sub{color:#EAD9C2}
.qr-box{width:min(230px,72vw);background:#fff;border-radius:14px;padding:18px;text-align:center;box-shadow:0 16px 44px rgba(0,0,0,.35)}
/* 小程序码已是成品图（自带白边做静默区），直接铺满卡片内宽即可 */
.qr-box .qr-img{width:100%;height:auto;display:block;border-radius:6px}
.qr-box .cap{margin-top:10px;font-size:13.5px;color:#7A6E5D;font-family:var(--serif);letter-spacing:.5px}

/* ===== FAQ ===== */
.faq{max-width:880px;margin:clamp(30px,4vw,46px) auto 0}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:8px;margin-bottom:12px;overflow:hidden}
.faq details[open]{border-color:var(--gold-light);box-shadow:0 10px 26px rgba(33,29,24,.07)}
.faq summary{list-style:none;cursor:pointer;padding:18px 52px 18px 22px;position:relative;
  font-family:var(--serif);font-size:clamp(15.5px,1.8vw,17.5px);letter-spacing:1px;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"＋";position:absolute;right:20px;top:50%;transform:translateY(-50%);color:var(--gold);font-size:20px;transition:.25s}
.faq details[open] summary::after{content:"－";color:var(--red)}
.faq .a{padding:14px 22px 20px;color:#4A443C;font-size:15px;border-top:1px dashed var(--line)}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:clamp(30px,4vw,48px)}
.contact-grid.two{grid-template-columns:repeat(2,1fr);max-width:860px;margin-left:auto;margin-right:auto}
.contact-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(24px,3vw,32px) clamp(20px,2.4vw,26px);text-align:center;transition:.25s}
.contact-card:hover{border-color:var(--gold);box-shadow:0 14px 32px rgba(33,29,24,.1)}
.contact-card svg{width:40px;height:40px;margin:0 auto 14px}
.contact-card h4{font-size:16px;color:var(--muted);letter-spacing:2px;margin-bottom:8px;font-weight:400}
.contact-card .v{font-size:clamp(16px,1.8vw,18px);font-family:var(--serif);color:var(--ink);letter-spacing:1px}
.contact-card a.v:hover{color:var(--red)}
.contact-card .v.big{font-size:clamp(21px,2.4vw,24px);color:var(--red);letter-spacing:2px}
.cta-band{margin-top:clamp(30px,4vw,44px);background:linear-gradient(120deg,#2E221A,#5C0E16);color:#fff;border-radius:var(--r);
  padding:clamp(26px,3.4vw,40px) clamp(22px,3vw,44px);display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h3{color:#fff;font-size:clamp(19px,2.4vw,24px);letter-spacing:1px;margin-bottom:6px}
.cta-band p{color:#E3C888;font-size:15px}
.cta-band .acts{display:flex;gap:12px;flex-wrap:wrap}

/* ===== 页脚 ===== */
footer{background:#1B1712;color:#B3A795;font-size:14px}
.foot-top{display:grid;grid-template-columns:1.25fr 1.15fr .8fr;gap:clamp(26px,4vw,44px);padding:clamp(38px,5vw,56px) 0 clamp(28px,4vw,40px)}
.foot-top h4{color:#EAD9C2;font-size:16px;letter-spacing:2px;margin-bottom:16px;font-family:var(--serif)}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand img{width:46px;height:auto;border-radius:50%}
.foot-brand .n{font-family:var(--serif);color:#fff;font-size:18px;letter-spacing:2px}
footer ul{list-style:none}
footer li{padding:4px 0}
footer a:hover{color:#fff}
.qual-foot li{font-size:13.5px;color:#8E8271;line-height:1.6}
.qual-foot b{color:#C7B9A2;font-weight:600}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:13px;color:#8E8271}
.foot-bottom a{color:#C9A252}
.foot-bottom .row{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 14px;align-items:center}
.foot-bottom .police{display:inline-flex;align-items:center;gap:6px;color:#C9A252}
.foot-bottom .police img{width:16px;height:16px;display:block;background:#fff;border-radius:3px;padding:1px;box-sizing:content-box}
#toTop{position:fixed;right:18px;bottom:20px;width:46px;height:46px;border-radius:50%;border:0;background:var(--red);color:#fff;
  font-size:20px;box-shadow:0 10px 26px rgba(166,27,41,.4);opacity:0;visibility:hidden;transition:.3s;z-index:90}
#toTop.on{opacity:1;visibility:visible}

/* ===== 动效 =====
   注意：滚动显现只在 JS 可用时生效（html 上会被脚本加上 .js 类）。
   这样即使脚本失效或加载失败，页面内容依然完整可见，不会出现空白区块。 */
.js .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.on{opacity:1;transform:none}

/* ==========================================================================
   新增组件：多页面所需的通用模块
   ========================================================================== */

/* ---- 通用两栏 / 三栏 ---- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(26px,4vw,52px);align-items:start}
.split.center-y{align-items:center}
.split.wide-right{grid-template-columns:1.15fr .85fr}
.split.wide-left{grid-template-columns:.85fr 1.15fr}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.mt-l{margin-top:clamp(30px,4vw,48px)}
.mt-m{margin-top:clamp(20px,2.6vw,32px)}

/* ---- 长文排版 ---- */
.prose{max-width:920px}
.prose p{margin-bottom:16px;color:#3D3830;text-align:justify;text-justify:inter-ideograph}
.prose h3{font-size:var(--h3);letter-spacing:1.5px;color:var(--red);margin:clamp(26px,3vw,38px) 0 14px;
  padding-left:14px;border-left:3px solid var(--gold)}
.prose h3:first-child{margin-top:0}
.prose strong{color:#1B1712}
.prose ul{margin:0 0 16px 20px;color:#3D3830}
.prose li{margin-bottom:8px}
.prose ol{margin:0 0 16px 22px;color:#3D3830}
.lead-para{font-size:clamp(16.5px,1.9vw,18.5px);color:#2A251F !important;line-height:1.9}

/* ---- 图片通用卡片 ---- */
.figure{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  box-shadow:0 12px 32px rgba(33,29,24,.1)}
.figure img{width:100%}
.figure figcaption{padding:12px 16px;font-size:13.5px;color:var(--muted);text-align:center;letter-spacing:.5px;
  border-top:1px solid var(--line);background:#FCFAF6}

/* ---- 图集（点击放大） ---- */
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);margin-top:clamp(28px,3.6vw,42px)}
.gal .gi{position:relative;border-radius:8px;overflow:hidden;border:1px solid var(--line);background:var(--card);
  cursor:zoom-in;transition:.25s}
.gal .gi:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(33,29,24,.14);border-color:var(--gold)}
.gal .gi img{width:100%;aspect-ratio:4/3;object-fit:cover}
.gal .gi .cap{padding:10px 12px;font-size:13px;color:#5C554C;line-height:1.55}
.gal.tall .gi img{aspect-ratio:3/4;object-fit:contain;background:#FBF8F3}
.gal.wide{grid-template-columns:repeat(3,1fr)}
/* 证照双列：竖版证书与横版证书混排，统一压进 3:4 画框，两卡等高才对得齐。
   注意必须给明确 aspect-ratio —— 写成 auto + object-fit:contain 时，
   Chromium 会把内容盒算成 0 高，图片位置占住了但一片空白。 */
.gal.cert2{grid-template-columns:repeat(2,1fr);align-items:start}
.gal.cert2 .gi img{aspect-ratio:4/3;object-fit:contain;background:#FBF8F3}
.gal.cert2 .gi .cap{padding:12px 14px;font-size:13.5px;line-height:1.6}
.gal.cert2 .gi .cap strong{color:#2A251F;font-weight:600}

/* ---- 时间轴 ---- */
.timeline{position:relative;margin-top:clamp(30px,4vw,44px);padding-left:clamp(20px,4vw,34px)}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--gold),rgba(201,162,82,.15))}
.tl-item{position:relative;padding:0 0 clamp(24px,3vw,34px) clamp(18px,2.4vw,26px)}
.tl-item::before{content:"";position:absolute;left:calc(-1 * clamp(20px,4vw,34px) + 1px);top:8px;width:12px;height:12px;
  border-radius:50%;background:var(--card);border:3px solid var(--red)}
.tl-item .yr{display:inline-block;font-family:var(--serif);color:var(--red);font-size:clamp(16px,1.9vw,19px);
  letter-spacing:2px;margin-bottom:6px}
.tl-item h4{font-size:clamp(15.5px,1.8vw,17px);letter-spacing:.5px;margin-bottom:6px}
.tl-item p{font-size:14.5px;color:#4A443C}
.tl-item:last-child{padding-bottom:0}

/* ---- 存证版本方案卡 ---- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:clamp(30px,4vw,48px);align-items:stretch}
.plan{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;transition:.25s}
.plan:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(33,29,24,.14);border-color:var(--gold)}
.plan .hd{padding:clamp(20px,2.4vw,26px) clamp(20px,2.4vw,26px) 16px;background:linear-gradient(135deg,#FBF3E4,#FFFDF9);
  border-bottom:1px solid var(--line)}
.plan .hd .pn{font-size:12.5px;letter-spacing:4px;color:var(--gold)}
.plan .hd h3{margin-top:8px;font-size:clamp(17px,2vw,20px);line-height:1.5;color:var(--red);letter-spacing:.5px}
.plan .bd{padding:clamp(20px,2.4vw,26px);flex:1}
.plan .bd ul{list-style:none}
.plan .bd li{position:relative;padding-left:22px;margin-bottom:10px;font-size:14.5px;color:#403A33;line-height:1.7}
.plan .bd li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;
  background:rgba(166,27,41,.18);border:1.5px solid var(--red)}
.plan .ft{padding:0 clamp(20px,2.4vw,26px) clamp(20px,2.4vw,26px);font-size:13px;color:var(--muted)}
.plan .badge{display:inline-block;font-size:12px;letter-spacing:1px;color:#fff;background:var(--red);
  padding:3px 10px;border-radius:12px;margin-left:8px;vertical-align:2px}
.plan.hl{border-color:var(--gold);box-shadow:0 16px 38px rgba(201,162,82,.22)}

/* ---- 鉴定方式 ---- */
.ways{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap);margin-top:clamp(30px,4vw,44px)}
.way{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:8px;
  padding:clamp(22px,2.6vw,30px) clamp(20px,2.4vw,28px);transition:.25s}
.way:hover{box-shadow:0 14px 32px rgba(33,29,24,.1)}
.way h3{font-size:clamp(16.5px,1.9vw,19px);color:var(--red);letter-spacing:1px;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.way h3 .no{flex:none;width:30px;height:30px;border-radius:50%;background:rgba(166,27,41,.08);color:var(--red);
  font-size:14px;display:flex;align-items:center;justify-content:center;font-family:var(--serif)}
.way p{font-size:14.5px;color:#4A443C;margin-top:8px}

/* ---- 承诺 / 声明卡 ---- */
.promise{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:clamp(28px,3.6vw,42px)}
.promise .pc{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--gold);border-radius:8px;
  padding:clamp(22px,2.6vw,30px) clamp(20px,2.4vw,26px)}
.promise .pc h3{font-size:clamp(16px,1.8vw,18px);color:var(--red);letter-spacing:2px;margin-bottom:12px}
.promise .pc p{font-size:14.5px;color:#4A443C}
.promise .pc p+p{margin-top:10px}

/* ---- 提示框 ---- */
.note-box{background:linear-gradient(90deg,#FBF3E4,#FAF7F2);border:1px solid var(--gold-light);
  border-left:4px solid var(--gold);border-radius:8px;padding:clamp(18px,2.4vw,24px) clamp(20px,3vw,28px);
  margin-top:clamp(24px,3vw,34px)}
.note-box h4{font-size:17px;color:var(--red);margin-bottom:8px;letter-spacing:1px}
.note-box p{font-size:14.5px;color:#4A443C}
.note-box.warn{background:linear-gradient(90deg,#FDF1F0,#FBF8F3);border-color:#E4B4B4;border-left-color:var(--red)}

/* ---- 关键信息表 ---- */
.spec{width:100%;border-collapse:collapse;margin-top:clamp(24px,3vw,34px);font-size:14.5px;background:var(--card);
  border:1px solid var(--line);border-radius:8px;overflow:hidden}
.spec th,.spec td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.spec th{width:34%;background:#FCFAF6;color:var(--muted);font-weight:400;letter-spacing:1px;white-space:nowrap}
.spec td{color:#2A251F;font-weight:600}
.spec td em{font-style:normal;color:var(--gold);font-weight:400}
.spec-wrap{overflow-x:auto}
/* 多列对比表（如三大存证版本） */
.spec.multi{min-width:760px}
.spec.multi th{width:15%;white-space:normal;font-size:13.5px}
.spec.multi tr:first-child td{background:#FCFAF6;font-weight:600;letter-spacing:.5px;color:var(--red)}
@media (max-width:560px){
  .spec.multi{font-size:13px;min-width:640px}
  .spec.multi th,.spec.multi td{padding:10px 11px}
}

/* ---- 灯箱（多图） ---- */
.lightbox{position:fixed;inset:0;background:rgba(16,11,8,.92);z-index:200;display:none;align-items:center;justify-content:center;padding:20px}
.lightbox.on{display:flex}
.lightbox img{max-width:min(1100px,94vw);max-height:86vh;width:auto;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox .close{position:absolute;top:14px;right:16px;background:none;border:0;color:#fff;font-size:34px;line-height:1}
.lightbox .cap{position:absolute;left:0;right:0;bottom:16px;text-align:center;color:#E7DDCE;font-size:14px;padding:0 20px}

/* ---- 荣誉条 ---- */
.honor{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:clamp(28px,3.6vw,42px)}
.honor .hi{display:flex;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:20px 22px;align-items:flex-start}
.honor .hi .ic{flex:none;width:38px;height:38px;border-radius:50%;background:rgba(201,162,82,.14);
  display:flex;align-items:center;justify-content:center;color:var(--gold);font-family:var(--serif);font-size:17px}
.honor .hi h4{font-size:15.5px;margin-bottom:4px}
.honor .hi p{font-size:13.5px;color:var(--muted);line-height:1.65}

/* ---- 内页小节导航：吸顶 Tab ----
   说明：这一条是 <main> 的直接子元素（不是包在小 section 里），
   否则 sticky 的可用滚动范围只有那一小段，滚两下就脱离吸附了。
   margin-bottom 负责把它与下方首个区块（尤其深色块）之间留出间隙。 */
.section-tabs{position:sticky;top:var(--navh);z-index:100;
  padding:14px 0 10px;margin-bottom:clamp(8px,1.3vw,16px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease}
.section-tabs.stuck{background:var(--paper);border-bottom-color:var(--line);
  box-shadow:0 10px 22px -16px rgba(33,29,24,.55)}
@media (min-width:901px){
  .section-tabs.stuck{background:rgba(250,247,242,.9);backdrop-filter:blur(10px)}
}
.tabs-scroll{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  -webkit-overflow-scrolling:touch}
.tabs-scroll::-webkit-scrollbar{display:none}
.tabs-scroll a{flex:none;display:inline-block;font-size:14px;padding:8px 18px;
  border:1px solid var(--line);border-radius:20px;background:var(--card);color:var(--muted);
  white-space:nowrap;transition:background .22s,color .22s,border-color .22s,box-shadow .22s}
.tabs-scroll a:hover{border-color:var(--gold);color:var(--red)}
/* 选中态：整颗填充品牌红 + 白字。
   刻意不加 box-shadow —— 阴影在米色底上会糊出一圈灰影，很难看。
   同时匹配 .active 和 aria-current（脚本两者都会写），互为保险。 */
.tabs-scroll a.active,
.tabs-scroll a[aria-current="true"]{background:var(--red) !important;border-color:var(--red) !important;
  color:#fff !important;font-weight:600}

/* ---- 联系方式列表 ---- */
.info-list{list-style:none;margin-top:clamp(20px,2.6vw,28px)}
.info-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line);align-items:flex-start}
.info-list li:last-child{border-bottom:0}
.info-list .k{flex:none;width:88px;color:var(--muted);font-size:14px;letter-spacing:1px;padding-top:2px}
.info-list .v{color:#2A251F;font-size:15px}
.info-list .v a{color:var(--red)}
.info-list .v a:hover{text-decoration:underline}

/* ===== 我要备案（备案入口页） ===== */
.apply-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(22px,3vw,36px);
  margin-top:clamp(30px,4vw,46px);align-items:stretch}
.apply-card{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(26px,3vw,38px) clamp(22px,2.6vw,32px)}
.apply-card.accent{border-color:var(--gold-light);background:linear-gradient(180deg,#FFFDF9,#FAF7F2)}
.apply-card h3{font-size:clamp(18px,2.1vw,21px);letter-spacing:1px;color:var(--red)}
.apply-card > p{font-size:14.5px;color:#4A443C;max-width:420px}
.apply-card .btn{width:100%;max-width:320px}
.apply-card .tiny{font-size:13px;color:var(--muted);line-height:1.7}
.apply-card .mini-qr{margin:2px 0 4px}
.build-tip{display:none;width:100%;margin-top:4px;text-align:left;font-size:14px;color:#4A443C;
  background:linear-gradient(90deg,#FBF3E4,#FAF7F2);border:1px solid var(--gold-light);
  border-left:4px solid var(--gold);border-radius:8px;padding:14px 18px}
.build-tip.on{display:block;animation:tipIn .3s ease}
@keyframes tipIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ================= 中屏（导航项较多，压缩间距防止挤压） ================= */
@media (max-width:1120px) and (min-width:901px){
  nav a{padding:9px 9px;font-size:14px}
  .nav-cta{padding:9px 14px !important}
  .brand .en{display:none}
}

/* ================= 平板 ================= */
@media (max-width:1024px){
  .adv{grid-template-columns:repeat(2,1fr)}
  .auth-grid{grid-template-columns:repeat(3,1fr)}
  .qual-grid{grid-template-columns:1fr}
  .qual-list.cols-2{grid-template-columns:1fr}
  .license-wrap{max-width:600px}
  .foot-top{grid-template-columns:1fr 1fr}
  .foot-top>div:last-child{grid-column:1/-1}
  .partners{grid-template-columns:repeat(3,1fr)}
  .plans{grid-template-columns:1fr;max-width:620px;margin-left:auto;margin-right:auto}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .promise{grid-template-columns:1fr;max-width:720px;margin-left:auto;margin-right:auto}
  .honor{grid-template-columns:1fr;max-width:720px;margin-left:auto;margin-right:auto}
  .gal{grid-template-columns:repeat(3,1fr)}
}

/* ================= 手机 / 窄屏 ================= */
@media (max-width:900px){
  :root{--navh:64px}
  #menuBtn{display:block;position:relative;z-index:140}
  .topbar{display:none}
  /* 抽屉式菜单 */
  #nav{position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);background:#fff;z-index:130;
    padding:calc(var(--navh) + 16px) 18px 24px;overflow-y:auto;
    transform:translateX(103%);visibility:hidden;
    transition:transform .34s cubic-bezier(.4,0,.2,1),visibility .34s;
    box-shadow:-12px 0 40px rgba(0,0,0,.18)}
  body.nav-open #nav{transform:none;visibility:visible}
  body.nav-open .nav-mask{opacity:1;visibility:visible}
  body.nav-open #menuBtn span:nth-child(1){top:21.5px;transform:rotate(45deg)}
  body.nav-open #menuBtn span:nth-child(2){opacity:0}
  body.nav-open #menuBtn span:nth-child(3){top:21.5px;transform:rotate(-45deg)}
  #nav ul{flex-direction:column;align-items:stretch;gap:2px}
  #nav a{padding:13px 14px;font-size:16px;border-radius:8px;border-bottom:1px solid var(--line)}
  #nav li:last-child a{border-bottom:0}
  .nav-cta{margin-top:14px;text-align:center;border-bottom:0 !important}
  .nav-close{display:block;position:absolute;top:14px;right:16px;width:38px;height:38px;border:0;
    background:rgba(166,27,41,.07);border-radius:50%;color:var(--red);font-size:20px;line-height:1}
  /* 首屏改用竖版图 + 纵向遮罩 */
  .hero{min-height:auto;background-image:url("../img/hero-mobile.jpg?v=b946d3ef");background-position:center top}
  .hero::before{background:linear-gradient(180deg,rgba(16,11,8,.62) 0%,rgba(16,11,8,.78) 45%,rgba(16,11,8,.93) 100%)}
  .hero .badge{margin-bottom:16px}
  /* 数据条 2×2 */
  .trust{margin-top:-34px}
  .trust-in{grid-template-columns:repeat(2,1fr)}
  .trust-in .ti:nth-child(2){border-right:0}
  .trust-in .ti:nth-child(1),.trust-in .ti:nth-child(2){border-bottom:1px solid var(--line)}
  .about-grid{grid-template-columns:1fr}
  .about-img{order:-1}
  .biz-grid,.flow-steps,.contact-grid,.mini-grid{grid-template-columns:1fr}
  .flow-arrow{justify-content:center;transform:rotate(90deg);font-size:20px}
  .mini-grid{gap:26px}
  .qr-box{margin:0 auto}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-band .acts{width:100%}
  .cta-band .acts .btn{flex:1 1 auto}
  .foot-top{grid-template-columns:1fr}
  .foot-top>div:last-child{grid-column:auto}
  .split,.split.wide-right,.split.wide-left{grid-template-columns:1fr}
  .apply-grid{grid-template-columns:1fr}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .ways{grid-template-columns:1fr}
  .gal,.gal.wide,.gal.cert2{grid-template-columns:repeat(2,1fr)}
  .page-hero h1{letter-spacing:2px}
  .spec th{width:auto}
  /* 吸顶 Tab 在窄屏收紧，并改为横向滑动 */
  .section-tabs{padding:10px 0 8px;margin-bottom:clamp(6px,1.6vw,12px)}
  .tabs-scroll a{font-size:13.5px;padding:7px 15px}
}
@media (max-width:560px){
  .auth-grid,.adv{grid-template-columns:repeat(2,1fr)}
  .auth-card{padding:20px 8px}
  .auth-card h3{font-size:15px}
  .adv .item{padding:22px 14px}
  .auth-note{flex-direction:column;gap:10px}
  .qual-item{align-items:flex-start;padding:14px 16px}
  .hero h1{letter-spacing:1px}
  .btn{padding:12px 22px;width:100%}
  .hero .btns{gap:10px}
  .contact-card{padding:22px 18px}
  .foot-bottom{font-size:12px}
  .partners{grid-template-columns:repeat(2,1fr)}
  .partner h3{font-size:14.5px}
  .gal,.gal.wide,.gal.cert2{grid-template-columns:1fr}
  .honor .hi{padding:18px}
  .way{padding:20px 18px}
  .spec{font-size:13.5px}
  .spec th,.spec td{padding:11px 12px}
  .info-list .k{width:72px;font-size:13px}
}
@media (max-width:380px){
  .trust-in{grid-template-columns:1fr}
  .trust-in .ti{border-right:0;border-bottom:1px solid var(--line)}
  .trust-in .ti:last-child{border-bottom:0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none !important;animation:none !important}
  .js .reveal{opacity:1;transform:none}
}