/* ============================================================
   客信新材料（广东）有限公司 - 企业官网样式
   设计风格：科技现代 / 商务蓝 / 磨砂亚麻
   ============================================================ */

/* ---------- CSS 变量（配色规范） ---------- */
:root {
  --canvas: #fcfcfc;          /* 亚麻画布 - 页面背景 */
  --wash: #f0f4fe;            /* 天空洗色 - 交替区块背景 */
  --ink: #020520;             /* 午夜墨蓝 - 主标题 */
  --graphite: #14141e;        /* 石墨灰 - 次级标题 */
  --slate: #374151;           /* 石板灰 - 导航/正文 */
  --fog: #696a72;             /* 雾灰 - 辅助文字 */
  --deepfog: #95959b;         /* 深雾灰 - 占位/时间戳 */
  --steel: #6b7280;           /* 钢灰 - 静音辅助 */
  --signal: #145aff;          /* 信号蓝 - 强调色（仅文字/边框/焦点环） */
  --action: #0f1f3d;          /* 主行动色 - 按钮边框/链接 */
  --jade: #16ca2e;            /* 翡翠绿 - 状态辅助 */
  --coral: #f26052;           /* 珊瑚红 - 提醒辅助 */
  --info: #0099ff;            /* 天蓝信息 */
  --card: #ffffff;            /* 卡片表面 */

  --font: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC",
          "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --mono: "Roboto Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --radius-pill: 100px;
  --radius-card: 8px;
  --radius-badge: 4px;
  --radius-img: 16px;
  --radius-input: 12px;
  --radius-btn: 12px;
  --radius-large: 40px;

  --shadow-card: rgba(0, 0, 0, 0.1) 0px 0px 4px -2px;
  --shadow-lift: rgba(0, 0, 0, 0.25) 0px 0px 4px -2px;
  --shadow-feature:
    rgba(0, 0, 0, 0.082) 0px 0.36px 1.81px -1.42px,
    rgba(0, 0, 0, 0.07) 0px 1.37px 6.87px -2.83px,
    rgba(0, 0, 0, 0.016) 0px 6px 30px -4.25px;

  --grad-blue: linear-gradient(rgb(59, 130, 246) 0%, rgb(20, 90, 255) 100%);
  --grad-hero: radial-gradient(97.8% 181.6% at 53.7% 50%,
                 #f0f4fe 0%, #e6edfd 40%, #fcfcfc 100%);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--slate);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 排版 ---------- */
h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.display {
  font-size: 56px;
  line-height: 1.05;
  letter-spacing: -1.51px;
  font-weight: 600;
  color: var(--ink);
}
.heading-lg {
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: -0.76px;
  font-weight: 600;
}
.heading { font-size: 22px; line-height: 1.25; letter-spacing: -0.22px; }
.heading-sm { font-size: 18px; line-height: 1.4; letter-spacing: -0.16px; }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.21px;
  color: var(--signal);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section { padding: 80px 0; }
.section--wash { background: var(--wash); }
.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--fog); margin-top: 14px; font-size: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn--outline {
  background: rgba(255,255,255,0.8);
  color: var(--action);
  border-color: var(--action);
}
.btn--outline:hover {
  border-color: var(--action);
  background: rgba(15,31,61,0.05);
  box-shadow: 0 4px 14px -6px rgba(15,31,61,0.3);
}
.btn--fill {
  background: var(--grad-blue);
  color: #ffffff;
  border-color: transparent;
}
.btn--fill:hover {
  filter: brightness(1.05);
  box-shadow: 0 8px 20px -8px rgba(20,90,255,0.6);
  transform: translateY(-1px);
}
.btn--ghost {
  background: #fcfcfc;
  color: var(--signal);
  border: 1px solid rgba(20,90,255,0.35);
  border-radius: 50px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 500;
}
.btn--ghost:hover { border-color: var(--signal); background: #fff; }

/* ---------- 导航栏 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(252,252,252,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--grad-blue);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px;
  letter-spacing: -0.5px;
  box-shadow: var(--shadow-card);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-size: 17px; font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
.brand-en { font-size: 10px; color: var(--fog); letter-spacing: 0.08em; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--slate);
  transition: background .2s ease, color .2s ease;
}
.nav-links a:hover { background: var(--wash); color: var(--ink); }
.nav-links a.active { background: var(--wash); color: var(--ink); font-weight: 600; }

.nav-cta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: none; background: none;
  cursor: pointer;
  flex-direction: column;
  align-items: center; justify-content: center;
  gap: 5px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: all .25s ease; }

/* ---------- 英雄区 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
  padding: 96px 0 120px;
}
.hero-inner { position: relative; z-index: 2; text-align: center; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.7);
  color: var(--slate);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 24px;
  border: 1px solid rgba(20,90,255,0.12);
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--jade); }
.hero h1 { max-width: 860px; margin: 0 auto 24px; }
.hero-sub {
  max-width: 620px;
  margin: 0 auto 40px;
  color: var(--slate);
  font-size: 18px;
  line-height: 1.6;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-visual {
  max-width: 900px;
  margin: 64px auto 0;
  border-radius: var(--radius-large);
  background: rgba(252,252,252,0.55);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-feature);
  padding: 12px;
}
.hero-visual .panel {
  border-radius: 28px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-card);
}
.hero-visual .panel img {
  width: 100%; height: auto; border-radius: 16px;
  display: block; object-fit: cover;
}

/* ---------- 核心优势 ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.advantage-card {
  background: var(--card);
  border-radius: var(--radius-large);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .25s ease, transform .25s ease;
}
.advantage-card:hover { box-shadow: var(--shadow-feature); transform: translateY(-4px); }
.advantage-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--wash);
  color: var(--signal);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.advantage-icon svg { width: 24px; height: 24px; }
.advantage-card h3 { font-size: 18px; margin-bottom: 10px; }
.advantage-card p { color: var(--fog); font-size: 14px; line-height: 1.6; }

/* ---------- 关于我们（首页预览） ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split-media {
  border-radius: var(--radius-large);
  background: var(--wash);
  padding: 12px;
  box-shadow: var(--shadow-feature);
}
.split-media .frame {
  border-radius: 28px; overflow: hidden; background: #fff;
  padding: 40px 32px; box-shadow: var(--shadow-card);
}
.split-media .frame .stat-row { display: flex; gap: 24px; margin-top: 28px; }
.stat { flex: 1; }
.stat-num { font-family: var(--mono); font-size: 28px; font-weight: 500; color: var(--ink); letter-spacing: -0.54px; }
.stat-label { font-size: 12px; color: var(--fog); margin-top: 4px; }
.split-body .lead { font-size: 17px; color: var(--graphite); line-height: 1.7; margin-bottom: 18px; }
.split-body p { color: var(--slate); line-height: 1.75; margin-bottom: 16px; }
.values { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0; }
.value-chip {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--wash);
  color: var(--action);
  font-size: 13px;
  font-weight: 500;
}

/* ---------- 产品卡片 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  display: flex; flex-direction: column;
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow .25s ease, transform .25s ease;
}
.product-card:hover { box-shadow: var(--shadow-feature); transform: translateY(-4px); }
.product-thumb {
  height: 200px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 40px; font-weight: 700; letter-spacing: -1px;
}
.product-thumb.g1 { background: linear-gradient(135deg, #3b82f6, #145aff); }
.product-thumb.g2 { background: linear-gradient(135deg, #6366f1, #4338ca); }
.product-thumb.g3 { background: linear-gradient(135deg, #0ea5e9, #0284c7); }
.product-thumb.g4 { background: linear-gradient(135deg, #14b8a6, #0f766e); }
.product-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.product-tag {
  align-self: flex-start;
  font-size: 12px; font-weight: 500;
  color: var(--signal);
  background: rgba(20,90,255,0.08);
  padding: 3px 10px;
  border-radius: var(--radius-badge);
  margin-bottom: 12px;
}
.product-body h3 { font-size: 19px; margin-bottom: 10px; }
.product-body p { color: var(--fog); font-size: 14px; line-height: 1.65; flex: 1; }
.product-link {
  margin-top: 20px;
  font-size: 14px; font-weight: 600;
  color: var(--action);
  display: inline-flex; align-items: center; gap: 6px;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.product-link:hover { border-color: var(--action); }

/* ---------- 案例卡片 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow .25s ease, transform .25s ease;
}
.case-card:hover { box-shadow: var(--shadow-feature); transform: translateY(-4px); }
.case-thumb { height: 180px; display: flex; align-items: center; justify-content: center; font-size: 30px; font-weight: 700; color: #fff; letter-spacing: -0.5px; }
.case-thumb.c1 { background: linear-gradient(135deg, #0f1f3d, #145aff); }
.case-thumb.c2 { background: linear-gradient(135deg, #0f766e, #14b8a6); }
.case-thumb.c3 { background: linear-gradient(135deg, #7c3aed, #4f46e5); }
.case-body { padding: 24px; }
.case-body .cat { font-size: 12px; color: var(--signal); font-weight: 500; margin-bottom: 8px; }
.case-body h3 { font-size: 18px; margin-bottom: 10px; }
.case-body p { color: var(--fog); font-size: 14px; line-height: 1.6; }

/* ---------- 新闻卡片 ---------- */
.news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px;
  display: flex; flex-direction: column;
  transition: box-shadow .25s ease, transform .25s ease;
}
.news-card:hover { box-shadow: var(--shadow-feature); transform: translateY(-4px); }
.news-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--deepfog); margin-bottom: 14px; }
.news-meta .cat { color: var(--signal); font-weight: 500; }
.news-card h3 { font-size: 18px; margin-bottom: 12px; line-height: 1.4; }
.news-card p { color: var(--fog); font-size: 14px; line-height: 1.6; flex: 1; }

/* ---------- 联系区（首页） ---------- */
.contact-band {
  background: var(--grad-blue);
  border-radius: var(--radius-large);
  padding: 64px 56px;
  color: #fff;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}
.contact-band h2 { color: #fff; margin-bottom: 16px; }
.contact-band p { color: rgba(255,255,255,0.85); line-height: 1.7; }
.contact-band .btn { align-self: center; justify-self: start; }

/* ---------- 页脚 ---------- */
.footer { background: #fbfbfd; border-top: 1px solid rgba(0,0,0,0.05); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { color: var(--fog); font-size: 14px; line-height: 1.7; margin-top: 16px; max-width: 320px; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 18px; }
.footer-col a, .footer-col li { display: block; color: var(--slate); font-size: 14px; margin-bottom: 12px; }
.footer-col a:hover { color: var(--signal); }
.footer-contact li { display: flex; gap: 8px; color: var(--fog); }
.footer-bottom {
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid rgba(0,0,0,0.06);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: var(--fog);
}
.footer-bottom a { color: var(--fog); }
.footer-bottom a:hover { color: var(--signal); }

/* ---------- 内页头部 ---------- */
.page-hero {
  background: var(--grad-hero);
  padding: 80px 0 72px;
  text-align: center;
}
.page-hero .eyebrow { margin-bottom: 12px; }
.page-hero h1 { font-size: 44px; letter-spacing: -1.2px; }
.page-hero p { max-width: 640px; margin: 18px auto 0; color: var(--slate); font-size: 17px; line-height: 1.7; }

/* ---------- 面包屑 ---------- */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--deepfog); padding: 20px 0; }
.breadcrumb a { color: var(--fog); }
.breadcrumb a:hover { color: var(--signal); }
.breadcrumb .sep { color: var(--deepfog); }

/* ---------- 关于页 ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: #e5e9f5; }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item::before {
  content: ""; position: absolute; left: -26px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--signal); border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--signal);
}
.timeline-item .year { font-family: var(--mono); font-size: 13px; color: var(--signal); font-weight: 500; }
.timeline-item h4 { font-size: 17px; margin: 6px 0 8px; }
.timeline-item p { color: var(--fog); font-size: 14px; line-height: 1.7; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.team-card { background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 28px; text-align: center; }
.team-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 600; font-size: 22px;
  background: var(--grad-blue);
}
.team-card h4 { font-size: 16px; }
.team-card .role { font-size: 13px; color: var(--signal); margin: 6px 0 10px; }
.team-card p { font-size: 13px; color: var(--fog); line-height: 1.6; }

/* ---------- 详情页 ---------- */
.article { max-width: 800px; margin: 0 auto; }
.article h1 { font-size: 36px; letter-spacing: -0.8px; margin-bottom: 20px; }
.article-meta { display: flex; gap: 16px; font-size: 13px; color: var(--deepfog); padding-bottom: 24px; border-bottom: 1px solid rgba(0,0,0,0.06); margin-bottom: 32px; }
.article-body { font-size: 16px; line-height: 1.85; color: var(--slate); }
.article-body h2 { font-size: 24px; margin: 40px 0 16px; letter-spacing: -0.3px; }
.article-body h3 { font-size: 19px; margin: 28px 0 12px; }
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol { margin: 0 0 18px 20px; }
.article-body li { list-style: disc; margin-bottom: 8px; }
.article-body ol li { list-style: decimal; }

.spec-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.spec-table th, .spec-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid rgba(0,0,0,0.06); }
.spec-table th { background: var(--wash); color: var(--ink); font-weight: 600; }
.spec-table td { color: var(--slate); }

.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--action); margin-top: 40px; }
.back-link:hover { color: var(--signal); }

/* ---------- 联系表单 ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info h3 { font-size: 20px; margin-bottom: 18px; }
.info-item { display: flex; gap: 14px; margin-bottom: 22px; }
.info-item .ic {
  flex-shrink: 0; width: 42px; height: 42px;
  border-radius: 10px; background: var(--wash); color: var(--signal);
  display: flex; align-items: center; justify-content: center;
}
.info-item .ic svg { width: 20px; height: 20px; }
.info-item h4 { font-size: 14px; color: var(--ink); margin-bottom: 4px; }
.info-item p { font-size: 14px; color: var(--fog); line-height: 1.5; }

.form-card {
  background: var(--card);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-feature);
  padding: 40px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--graphite); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 14px 15px;
  border: 1px solid #cfcfcf;
  border-radius: var(--radius-input);
  background: #fff;
  color: var(--graphite);
  font-size: 14px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--deepfog); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--info);
  box-shadow: rgba(0,153,255,1) 0px 0px 0px 3px;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-tip { font-size: 12px; color: var(--deepfog); margin-top: 12px; }

/* ---------- Logo 条（客户） ---------- */
.logo-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 32px; align-items: center; }
.logo-item {
  height: 64px;
  display: flex; align-items: center; justify-content: center;
  color: #9aa0ad; font-weight: 600; font-size: 16px;
  filter: grayscale(1); opacity: 0.75;
}

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid, .case-grid, .news-list { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .display { font-size: 44px; letter-spacing: -1.2px; }
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--canvas);
    flex-direction: column; align-items: stretch;
    padding: 16px 24px; gap: 4px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    box-shadow: var(--shadow-card);
    transform: translateY(-120%); opacity: 0; pointer-events: none;
    transition: transform .3s ease, opacity .3s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 14px 16px; }
  .nav-toggle { display: flex; }
  .nav-cta .btn { display: none; }
  .hero { padding: 64px 0 80px; }
  .hero h1 { font-size: 34px; letter-spacing: -0.8px; }
  .display { font-size: 34px; letter-spacing: -0.8px; }
  .heading-lg { font-size: 30px; letter-spacing: -0.5px; }
  .advantage-grid, .product-grid, .case-grid, .news-list, .team-grid { grid-template-columns: 1fr; }
  .logo-strip { grid-template-columns: repeat(2, 1fr); }
  .contact-band { grid-template-columns: 1fr; padding: 40px 28px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .article h1 { font-size: 28px; }
}