/* ============================================================
   评墨君 · 其实文化  —— 视觉设计系统
   风格：中国红 × 现代极简，以朱红为主色调，金线点缀，水墨留白
   ============================================================ */

/* 微软雅黑统一字体 */

:root{
  --ink-900:#1b1815;
  --ink-800:#26221d;
  --ink-700:#3a352d;
  --ink-500:#6b6255;
  --ink-300:#a89d8a;
  --paper-0:#faf7f0;
  --paper-1:#f3ede1;
  --paper-2:#eae1cf;
  --gold:#a9832f;
  --gold-soft:#c9a24d;
  --seal:#c1272d;
  --seal-dark:#9c1f24;
  --red-900:#7c1518;
  --red-800:#a3211f;
  --red-700:#c1352f;
  --line:rgba(27,24,21,0.12);
  --line-on-red:rgba(250,247,240,0.15);
  --max:1180px;
  --serif:'Microsoft YaHei', sans-serif;
  --sans:'Microsoft YaHei', sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper-0);
  color:var(--ink-800);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  line-height:1.7;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family:var(--serif); margin:0; font-weight:700; }
p{ margin:0; }

.container{ max-width:var(--max); margin:0 auto; padding:0 32px; }

/* ---------- 米字格纹理背景 ---------- */
.grid-texture{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:64px 64px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  padding:22px 0;
  transition:background .35s ease, padding .35s ease, box-shadow .35s ease, border-color .35s ease;
  border-bottom:1px solid transparent;
}
.site-header.solid{
  background:rgba(250,247,240,0.92);
  backdrop-filter:blur(10px);
  padding:14px 0;
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 24px rgba(27,24,21,0.05);
}
.site-header .container{ display:flex; align-items:center; justify-content:space-between; }

.brand{ display:flex; align-items:center; gap:14px; }
.brand-logo{
  display:inline-block; height:42px; aspect-ratio:1121/283; flex:none;
  background:url('../images/logo-right.png') no-repeat left center / contain;
}

.site-header.on-dark:not(.solid) .brand-logo{ background-image:url('../images/logo-right-light.png'); }

.footer-brand .brand-logo{ background-image:url('../images/logo-right-light.png'); height:48px; }

.nav{ display:flex; align-items:center; gap:44px; }
.nav a{
  font-size:15px; letter-spacing:.05em; color:var(--ink-700);
  position:relative; padding:6px 0;
}
.nav a::after{
  content:''; position:absolute; left:0; right:0; bottom:0; height:1px;
  background:var(--seal); transform:scaleX(0); transform-origin:right;
  transition:transform .3s ease;
}
.nav a:hover::after, .nav a.active::after{ transform:scaleX(1); transform-origin:left; }
.nav a.active{ color:var(--seal); }

.nav-toggle{ display:none; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 30px; font-size:14px; letter-spacing:.1em;
  border:1px solid var(--seal); color:var(--seal);
  transition:all .3s ease; white-space:nowrap;
}
.btn:hover{ background:var(--seal); color:var(--paper-0); }
.btn-primary{ background:var(--seal); border-color:var(--seal); color:var(--paper-0); }
.btn-primary:hover{ background:var(--seal-dark); border-color:var(--seal-dark); }
.btn-ghost-light{ border-color:rgba(250,247,240,0.55); color:var(--paper-0); }
.btn-ghost-light:hover{ background:var(--paper-0); color:var(--ink-900); }
.btn-arrow{ transition:transform .3s ease; }
.btn:hover .btn-arrow{ transform:translateX(4px); }

/* ---------- 版块通用 ---------- */
section{ position:relative; }
.section-pad{ padding:120px 0; }
.eyebrow{
  display:flex; align-items:center; gap:14px;
  font-size:13px; letter-spacing:.35em; color:var(--seal);
  margin-bottom:22px; text-transform:uppercase;
}
.eyebrow::before{ content:''; width:34px; height:1px; background:var(--seal); }
.section-title{ font-size:clamp(30px,3.6vw,44px); color:var(--ink-900); }
.section-desc{ margin-top:20px; max-width:620px; color:var(--ink-500); font-size:16px; }
.section-head{ display:flex; align-items:flex-end; justify-content:space-between; gap:40px; flex-wrap:wrap; margin-bottom:64px; }

/* ---------- Hero ---------- */
.hero{
  min-height:100vh; display:flex; align-items:center;
  background:linear-gradient(155deg,var(--red-800) 0%,var(--red-900) 100%);
  color:var(--paper-0); overflow:hidden; position:relative;
}
.hero .grid-texture{
  position:absolute; inset:0; opacity:.5;
  background-image:
    linear-gradient(rgba(250,247,240,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(250,247,240,.05) 1px, transparent 1px);
}
.hero-seal-mark{
  position:absolute; right:6%; top:50%; transform:translateY(-50%);
  font-family:var(--serif); font-size:min(46vw,560px); font-weight:900;
  color:rgba(250,247,240,0.045); line-height:1; user-select:none; pointer-events:none;
}
.hero-inner{ position:relative; z-index:2; padding-top:110px; }
.hero-kicker{
  display:inline-flex; align-items:center; gap:12px;
  border:1px solid rgba(250,247,240,.25); padding:8px 18px;
  font-size:12px; letter-spacing:.3em; color:var(--gold-soft); margin-bottom:36px;
}
.hero-title{
  font-size:clamp(40px,6vw,74px); line-height:1.25; color:var(--paper-0);
  max-width:820px; font-weight:700;
}
.hero-title em{ font-style:normal; color:var(--gold-soft); }
.hero-lede{
  margin-top:30px; max-width:560px; font-size:17px; color:var(--paper-2);
  font-family:var(--sans);
}
.hero-actions{ display:flex; gap:20px; margin-top:52px; flex-wrap:wrap; }
.hero-stats{
  margin-top:96px; display:grid; grid-template-columns:repeat(4,auto);
  gap:56px; border-top:1px solid rgba(250,247,240,.15); padding-top:36px;
}
.hero-stats .num{ font-family:var(--serif); font-size:32px; color:var(--paper-0); }
.hero-stats .lbl{ font-size:12px; letter-spacing:.15em; color:var(--paper-2); margin-top:6px; }

/* ---------- 碑帖卡片 ---------- */
.tie-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:2px; background:var(--line); }
.tie-card{
  background:var(--paper-0); padding:56px 40px; position:relative;
  min-height:420px; display:flex; flex-direction:column; justify-content:flex-end;
  overflow:hidden; transition:background .4s ease;
}
.tie-card::before{
  content:attr(data-glyph);
  position:absolute; top:36px; right:32px;
  font-family:var(--serif); font-size:120px; color:var(--paper-2);
  transition:color .4s ease, transform .5s ease; line-height:1;
}
.tie-card:hover::before{ color:var(--paper-1); transform:scale(1.06) rotate(2deg); }
.tie-card:hover{ background:var(--paper-1); }
.tie-index{ font-size:12px; letter-spacing:.2em; color:var(--seal); margin-bottom:18px; }
.tie-card h3{ font-size:26px; color:var(--ink-900); }
.tie-card p{ margin-top:14px; color:var(--ink-500); font-size:14px; line-height:1.8; }
.tie-link{ margin-top:26px; font-size:13px; letter-spacing:.15em; color:var(--seal); display:inline-flex; align-items:center; gap:8px; }

/* ---------- AI 评墨君 板块 ---------- */
.ai-section{ background:var(--paper-1); color:var(--ink-800); }
.ai-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:80px; align-items:center; }
.ai-grid .eyebrow{ color:var(--seal); }
.ai-grid .eyebrow::before{ background:var(--seal); }
.ai-section .section-title{ color:var(--ink-900); }
.ai-section .section-desc{ color:var(--ink-500); }
.ai-feature-list{ margin-top:44px; display:grid; gap:26px; }
.ai-feature{ display:flex; gap:20px; align-items:flex-start; }
.ai-feature .idx{
  font-family:var(--serif); font-size:15px; color:var(--seal);
  border:1px solid rgba(193,39,45,.35); width:34px; height:34px; flex:none;
  display:flex; align-items:center; justify-content:center; border-radius:50%;
}
.ai-feature h4{ font-size:16px; color:var(--ink-900); font-weight:600; font-family:var(--sans); }
.ai-feature p{ font-size:14px; color:var(--ink-500); margin-top:6px; }

.ai-panel{
  background:linear-gradient(155deg,var(--red-700),var(--red-900));
  border:1px solid rgba(250,247,240,.12);
  padding:48px; text-align:center; position:relative;
  box-shadow:0 30px 60px -20px rgba(124,21,24,0.45);
}
.ai-panel .qr{
  width:168px; height:168px; margin:0 auto 24px; background:var(--paper-0);
  padding:14px; border-radius:4px;
}
.ai-panel .qr svg, .ai-panel .qr img{ width:100%; height:100%; object-fit:contain; }
.ai-panel .qr-name{ font-family:var(--serif); font-size:20px; color:var(--paper-0); }
.ai-panel .qr-tip{ font-size:13px; color:var(--paper-2); margin-top:10px; letter-spacing:.05em; }
.ai-panel .qr-divider{ width:40px; height:1px; background:rgba(250,247,240,.25); margin:28px auto; }
.ai-panel .qr-badge{ font-size:12px; letter-spacing:.2em; color:var(--gold-soft); }

/* ---------- 四大业务 ---------- */
.biz-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.biz-card{ background:var(--paper-0); padding:44px 34px; }
.biz-num{ font-family:var(--serif); font-size:14px; color:var(--seal); }
.biz-card h3{ font-size:19px; margin-top:22px; color:var(--ink-900); }
.biz-card p{ margin-top:16px; font-size:13.5px; color:var(--ink-500); }
.biz-tags{ margin-top:20px; display:flex; flex-wrap:wrap; gap:8px; }
.biz-tags span{ font-size:11.5px; padding:5px 11px; border:1px solid var(--line); color:var(--ink-500); }

/* ---------- 关于我们（首页摘要） ---------- */
.about-summary{ background:var(--paper-1); }
.about-grid{ display:grid; grid-template-columns:.95fr 1.05fr; gap:90px; align-items:center; }
.about-media{
  aspect-ratio:4/5; background:linear-gradient(155deg,var(--red-700),var(--red-900));
  position:relative; overflow:hidden;
}
.about-media .brush{ position:absolute; inset:0; opacity:.5; }
.about-media .caption{
  position:absolute; left:28px; bottom:28px; color:var(--paper-1);
  font-family:var(--serif); font-size:15px; letter-spacing:.1em;
}
.about-quote{ font-family:var(--serif); font-size:clamp(22px,2.4vw,30px); color:var(--ink-900); line-height:1.7; }
.about-quote::before{ content:'“'; color:var(--seal); font-size:1.4em; margin-right:2px; }
.about-quote::after{ content:'”'; color:var(--seal); font-size:1.4em; margin-left:2px; }
.about-body{ margin-top:28px; color:var(--ink-500); font-size:15px; }
.about-partners{ margin-top:44px; display:flex; flex-wrap:wrap; gap:14px 34px; }
.about-partners span{ font-size:13px; color:var(--ink-700); letter-spacing:.06em; padding-bottom:6px; border-bottom:1px solid var(--seal); }

/* ---------- 产品 ---------- */
.product-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:2px; background:var(--line); }
.product-card{ background:var(--paper-0); padding:52px; display:grid; grid-template-columns:150px 1fr; gap:32px; }
.product-thumb{
  width:150px; height:190px; background:linear-gradient(165deg,var(--paper-2),var(--paper-1));
  border:1px solid var(--line); position:relative; overflow:hidden;
}
.product-thumb::after{
  content:attr(data-mark); position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:40px; color:var(--ink-300);
}
.product-tag{ font-size:11.5px; letter-spacing:.2em; color:var(--seal); }
.product-card h3{ font-size:20px; margin-top:14px; color:var(--ink-900); line-height:1.5; }
.product-card p{ font-size:13.5px; color:var(--ink-500); margin-top:14px; }
.product-meta{ margin-top:20px; display:flex; align-items:center; gap:18px; font-size:12.5px; color:var(--ink-500); }
.product-meta b{ color:var(--seal); font-weight:600; }

/* ---------- CTA 区块 ---------- */
.cta{
  background:linear-gradient(155deg,var(--red-700),var(--red-900)); color:var(--paper-0); text-align:center; padding:130px 0;
  position:relative; overflow:hidden;
}
.cta::before{
  content:'评'; position:absolute; font-family:var(--serif); font-weight:900;
  font-size:600px; color:rgba(250,247,240,.03); top:50%; left:50%; transform:translate(-50%,-50%);
  line-height:1;
}
.cta-inner{ position:relative; z-index:1; max-width:700px; margin:0 auto; }
.cta h2{ font-size:clamp(28px,3.6vw,42px); color:var(--paper-0); }
.cta p{ margin-top:20px; color:var(--paper-2); font-size:16px; }
.cta .hero-actions{ justify-content:center; margin-top:44px; }

/* ---------- 页脚 ---------- */
.site-footer{ background:var(--ink-900); color:var(--paper-2); padding:80px 0 0; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:60px; padding-bottom:64px; border-bottom:1px solid rgba(250,247,240,.08); }
.footer-desc{ margin-top:20px; font-size:13.5px; color:var(--ink-300); max-width:280px; }
.footer-col h5{ font-family:var(--sans); font-size:13px; letter-spacing:.15em; color:var(--seal); font-weight:600; margin-bottom:22px; }
.footer-col li{ margin-bottom:13px; font-size:13.5px; color:var(--paper-2); }
.footer-col a:hover{ color:var(--seal); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; padding:28px 0; font-size:12.5px; color:var(--ink-300); flex-wrap:wrap; gap:12px; }

/* ---------- 内页 Page Hero ---------- */
.page-hero{
  background:linear-gradient(180deg,var(--red-900),var(--red-800));
  color:var(--paper-0); padding:200px 0 100px;
  position:relative; overflow:hidden;
}
.page-hero .container{ position:relative; z-index:1; }
.page-hero .crumb{ font-size:13px; letter-spacing:.2em; color:var(--gold-soft); margin-bottom:24px; }
.page-hero h1{ font-size:clamp(34px,4.6vw,54px); color:var(--paper-0); }
.page-hero p{ margin-top:22px; max-width:560px; color:var(--paper-2); font-size:16px; }

/* ---------- 淡入动画 ---------- */
.reveal{ opacity:0; transform:translateY(28px); transition:opacity .8s ease, transform .8s ease; }
.reveal.in{ opacity:1; transform:none; }

/* ---------- 关于页专用 ---------- */
.timeline{ display:grid; gap:0; }
.tl-row{ display:grid; grid-template-columns:140px 1fr; gap:40px; padding:36px 0; border-top:1px solid var(--line); }
.tl-row:last-child{ border-bottom:1px solid var(--line); }
.tl-num{ font-family:var(--serif); font-size:22px; color:var(--seal); }
.tl-row h3{ font-size:19px; color:var(--ink-900); }
.tl-row p{ margin-top:10px; font-size:14px; color:var(--ink-500); max-width:640px; }

.value-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.value-card{ background:var(--paper-0); padding:40px 32px; }
.value-card .mark{ font-family:var(--serif); font-size:34px; color:var(--seal); }
.value-card h4{ margin-top:18px; font-size:17px; color:var(--ink-900); }
.value-card p{ margin-top:12px; font-size:13.5px; color:var(--ink-500); }

/* ============================================================
   新增组件：截图展示 / 证书展示 / 知识体系 / 轮播 / 标签页
   ============================================================ */

/* ---------- 截图展示 ---------- */
.screenshot-section{ background:var(--paper-1); }
.screenshot-grid{
  display:grid; grid-template-columns:repeat(4,1fr); gap:24px;
}
.screenshot-card{
  background:var(--paper-0); border:1px solid var(--line);
  border-radius:16px; overflow:hidden;
  box-shadow:0 10px 30px rgba(27,24,21,0.06);
  transition:transform .35s ease, box-shadow .35s ease;
}
.screenshot-card:hover{ transform:translateY(-8px); box-shadow:0 20px 50px rgba(27,24,21,0.12); }
.screenshot-card .thumb{
  aspect-ratio:9/16; overflow:hidden; background:var(--paper-2);
}
.screenshot-card .thumb img{
  width:100%; height:100%; object-fit:cover;
  transition:transform .6s ease;
}
.screenshot-card:hover .thumb img{ transform:scale(1.05); }
.screenshot-card .info{ padding:22px 20px 24px; }
.screenshot-card .tag{
  display:inline-block; font-size:11px; letter-spacing:.15em;
  color:var(--seal); border:1px solid rgba(193,39,45,.25); padding:4px 10px; margin-bottom:12px;
}
.screenshot-card h4{ font-size:17px; color:var(--ink-900); }
.screenshot-card p{ font-size:13px; color:var(--ink-500); margin-top:8px; line-height:1.7; }

/* ---------- 证书展示 ---------- */
.certificate-showcase{ background:var(--paper-0); }
.certificate-grid{
  display:grid; grid-template-columns:1fr 1.2fr; gap:70px; align-items:center;
}
.certificate-frame{
  background:linear-gradient(155deg,var(--paper-1),var(--paper-0));
  border:1px solid var(--line); padding:24px; border-radius:8px;
  box-shadow:0 30px 70px rgba(27,24,21,0.1);
}
.certificate-frame img{ border-radius:4px; box-shadow:0 4px 20px rgba(27,24,21,0.08); }
.certificate-features{ display:grid; gap:22px; margin-top:36px; }
.certificate-features li{
  display:flex; gap:16px; align-items:flex-start;
  font-size:14px; color:var(--ink-500); line-height:1.7;
}
.certificate-features .check{
  width:24px; height:24px; flex:none; border-radius:50%;
  background:var(--seal); color:var(--paper-0);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:13px;
}

/* ---------- 轮播 ---------- */
.carousel{ position:relative; }
.carousel-track{ display:flex; transition:transform .5s ease; }
.carousel-slide{ min-width:100%; padding:0 8px; box-sizing:border-box; }
.carousel-slide img{
  width:100%; border-radius:12px; border:1px solid var(--line);
  box-shadow:0 20px 60px rgba(27,24,21,0.12);
}
.carousel-dots{
  display:flex; justify-content:center; gap:10px; margin-top:28px;
}
.carousel-dots button{
  width:10px; height:10px; border-radius:50%; border:none;
  background:var(--paper-2); cursor:pointer; transition:background .3s ease;
}
.carousel-dots button.active{ background:var(--seal); }
.carousel-nav{
  position:absolute; top:50%; transform:translateY(-50%);
  width:48px; height:48px; border-radius:50%; border:1px solid var(--line);
  background:var(--paper-0); color:var(--ink-700); cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  transition:all .3s ease;
}
.carousel-nav:hover{ background:var(--seal); color:var(--paper-0); border-color:var(--seal); }
.carousel-nav.prev{ left:-24px; }
.carousel-nav.next{ right:-24px; }

/* ---------- 标签页 ---------- */
.tabs-nav{
  display:flex; gap:8px; flex-wrap:wrap; margin-bottom:44px;
}
.tab-btn{
  padding:12px 24px; font-size:14px; letter-spacing:.05em;
  border:1px solid var(--line); background:var(--paper-0); color:var(--ink-700);
  cursor:pointer; transition:all .3s ease;
}
.tab-btn:hover{ border-color:var(--seal); color:var(--seal); }
.tab-btn.active{ background:var(--seal); border-color:var(--seal); color:var(--paper-0); }
.tab-panel{ display:none; }
.tab-panel.active{ display:block; animation:fadeIn .5s ease; }
@keyframes fadeIn{ from{ opacity:0; transform:translateY(12px);} to{ opacity:1; transform:none;} }

/* ---------- 知识体系页面 ---------- */
.class-hero{ background:linear-gradient(180deg,var(--red-900),var(--red-800)); }
.class-intro{ background:var(--paper-1); }
.class-intro-grid{ display:grid; grid-template-columns:1fr 1fr; gap:60px; }
.class-intro-card{
  background:var(--paper-0); border:1px solid var(--line); padding:36px;
}
.class-intro-card h3{
  font-size:20px; color:var(--ink-900); margin-bottom:16px;
  display:flex; align-items:center; gap:12px;
}
.class-intro-card h3::before{
  content:''; width:6px; height:24px; background:var(--seal); border-radius:3px;
}
.class-intro-card ul{ list-style:none; }
.class-intro-card li{
  padding:10px 0; border-bottom:1px dashed var(--line);
  font-size:14px; color:var(--ink-500);
}
.class-intro-card li:last-child{ border-bottom:none; }

/* 分类体系树 */
.class-tree{ display:grid; gap:24px; }
.class-branch{
  background:var(--paper-0); border:1px solid var(--line); border-radius:8px; overflow:hidden;
}
.class-branch-header{
  background:linear-gradient(90deg,var(--paper-1),var(--paper-0));
  padding:24px 30px; display:flex; align-items:center; gap:18px;
  cursor:pointer; transition:background .3s ease;
}
.class-branch-header:hover{ background:var(--paper-1); }
.class-branch-header .num{
  width:44px; height:44px; flex:none; border-radius:50%;
  background:var(--seal); color:var(--paper-0);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:16px;
}
.class-branch-header h3{ font-size:20px; color:var(--ink-900); }
.class-branch-header .target{
  margin-left:auto; font-size:12px; color:var(--seal); letter-spacing:.1em;
  border:1px solid rgba(193,39,45,.25); padding:4px 10px;
}
.class-branch-body{
  display:grid; grid-template-columns:repeat(3,1fr); gap:2px;
  background:var(--line); border-top:1px solid var(--line);
  max-height:0; overflow:hidden; transition:max-height .4s ease;
}
.class-branch.expanded .class-branch-body{ max-height:800px; }
.class-branch-body .leaf{
  background:var(--paper-0); padding:24px;
}
.class-branch-body .leaf h4{
  font-size:15px; color:var(--ink-900); margin-bottom:10px;
}
.class-branch-body .leaf ul{ list-style:disc; padding-left:18px; }
.class-branch-body .leaf li{
  font-size:13px; color:var(--ink-500); line-height:1.8;
}

/* 检索体系 */
.search-system{ background:var(--paper-1); }
.search-cards{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.search-card{
  background:var(--paper-0); border:1px solid var(--line); padding:32px 28px;
  text-align:center; transition:transform .3s ease, box-shadow .3s ease;
}
.search-card:hover{ transform:translateY(-6px); box-shadow:0 16px 40px rgba(27,24,21,0.08); }
.search-card .icon{
  width:56px; height:56px; margin:0 auto 20px; border-radius:50%;
  background:linear-gradient(155deg,var(--red-700),var(--red-900));
  color:var(--paper-0); display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:22px;
}
.search-card h4{ font-size:17px; color:var(--ink-900); margin-bottom:10px; }
.search-card p{ font-size:13px; color:var(--ink-500); line-height:1.7; }

/* 保障机制 */
.guarantee-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:20px; }
.guarantee-card{
  background:var(--paper-0); border:1px solid var(--line); padding:30px 24px;
  text-align:center;
}
.guarantee-card .num{
  font-family:var(--serif); font-size:36px; color:var(--seal); line-height:1;
  margin-bottom:16px;
}
.guarantee-card h4{ font-size:16px; color:var(--ink-900); margin-bottom:10px; }
.guarantee-card p{ font-size:12.5px; color:var(--ink-500); line-height:1.7; }

/* 合规结论 */
.conclusion{ background:linear-gradient(155deg,var(--red-700),var(--red-900)); color:var(--paper-0); }
.conclusion-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:30px; }
.conclusion-card{
  background:rgba(250,247,240,0.08); border:1px solid rgba(250,247,240,0.12);
  padding:36px 30px; text-align:center;
}
.conclusion-card .mark{
  width:56px; height:56px; margin:0 auto 20px; border-radius:50%;
  background:var(--gold-soft); color:var(--ink-900);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:22px;
}
.conclusion-card h4{ font-size:18px; color:var(--paper-0); margin-bottom:10px; }
.conclusion-card p{ font-size:14px; color:var(--paper-2); line-height:1.7; }

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .tie-grid{ grid-template-columns:1fr; }
  .biz-grid{ grid-template-columns:repeat(2,1fr); }
  .ai-grid{ grid-template-columns:1fr; gap:56px; }
  .about-grid{ grid-template-columns:1fr; gap:48px; }
  .value-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:40px; }
  .hero-stats{ grid-template-columns:repeat(2,1fr); }
  .screenshot-grid{ grid-template-columns:repeat(2,1fr); }
  .certificate-grid{ grid-template-columns:1fr; }
  .class-intro-grid{ grid-template-columns:1fr; }
  .class-branch-body{ grid-template-columns:1fr; }
  .search-cards{ grid-template-columns:repeat(2,1fr); }
  .guarantee-grid{ grid-template-columns:repeat(2,1fr); }
  .conclusion-grid{ grid-template-columns:1fr; }
}
@media (max-width:760px){
  .container{ padding:0 22px; }
  .nav{
    position:fixed; inset:0 0 0 auto; width:78%; max-width:320px;
    background:linear-gradient(170deg,var(--red-800),var(--red-900)); flex-direction:column; align-items:flex-start;
    padding:120px 36px; gap:28px; transform:translateX(100%);
    transition:transform .4s ease; z-index:99;
  }
  .nav.open{ transform:translateX(0); }
  .nav a{ color:var(--paper-1); font-size:18px; }
  .nav-toggle{
    display:flex; flex-direction:column; gap:5px; width:26px; z-index:101;
    background:none; border:none; cursor:pointer; padding:8px;
  }
  .nav-toggle span{ height:1px; background:currentColor; width:100%; }
  .site-header .container{ color:inherit; }
  .product-card{ grid-template-columns:1fr; }
  .product-thumb{ width:100%; }
  .biz-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .section-pad{ padding:80px 0; }
  .tl-row{ grid-template-columns:1fr; gap:10px; }
  .screenshot-grid{ grid-template-columns:1fr; }
  .search-cards{ grid-template-columns:1fr; }
  .guarantee-grid{ grid-template-columns:1fr; }
  .carousel-nav.prev{ left:8px; }
  .carousel-nav.next{ right:8px; }
}