/* ============ 印辰设计系统 — 深蓝 / 暖橙 / 现代杂志风 ============ */
:root {
  --brand: #0a2540;
  --brand-2: #16345b;
  --brand-3: #1f4a7c;
  --accent: #ff6b35;
  --accent-2: #ff8a5b;
  --accent-soft: #ffece2;
  --cream: #fff7ec;
  --ink: #131722;
  --ink-2: #3a4254;
  --muted: #6f7689;
  --line: #e6e6ea;
  --bg: #fafafa;
  --card: #ffffff;
  --shadow-sm: 0 1px 3px rgba(10,37,64,.06), 0 4px 12px rgba(10,37,64,.04);
  --shadow-md: 0 12px 40px rgba(10,37,64,.10);
  --shadow-lg: 0 24px 70px rgba(255,107,53,.18);
  --radius: 8px;
  --radius-lg: 18px;
  --font: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, sans-serif;
  --font-serif: 'Source Han Serif SC', 'STSong', 'SimSun', serif;
  --container: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }

/* ============ 顶部导航(无背景透明,滚动加深) ============ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,250,250,.86);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.logo {
  display: flex; align-items: center; gap: 12px;
  font-weight: 800; font-size: 18px; color: var(--brand);
  letter-spacing: -.3px;
}
.logo-mark {
  width: 38px; height: 38px;
  background: var(--brand); color: var(--accent);
  display: grid; place-items: center;
  font-weight: 900; font-size: 20px;
  border-radius: 4px;
  font-family: var(--font-serif);
}
.nav-links { display: flex; gap: 36px; }
.nav-links a {
  font-size: 14px; color: var(--ink-2); font-weight: 500;
  position: relative; padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; left: 50%; bottom: -4px;
  width: 0; height: 2px; background: var(--accent);
  transition: all .25s; transform: translateX(-50%);
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: 11px 24px;
  background: var(--brand); color: #fff !important;
  font-size: 13.5px; font-weight: 700; letter-spacing: .5px;
  border-radius: 4px;
  transition: all .25s;
}
.nav-cta:hover { background: var(--accent); color: #fff !important; }

/* ============ Hero — 居中大杂志风 ============ */
.hero {
  position: relative;
  padding: 110px 0 140px;
  background: var(--cream);
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute;
  top: -120px; right: -100px;
  width: 380px; height: 380px;
  background: var(--accent); opacity: .12;
  border-radius: 50%; filter: blur(60px);
}
.hero::after {
  content: ''; position: absolute;
  bottom: -100px; left: -120px;
  width: 320px; height: 320px;
  background: var(--brand); opacity: .08;
  border-radius: 50%; filter: blur(60px);
}
.hero-content { position: relative; max-width: 860px; margin: 0 auto; }
.tagline {
  display: inline-block;
  padding: 6px 16px;
  background: #fff; color: var(--brand);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: 2px;
  margin-bottom: 28px;
}
.tagline .dot {
  display: inline-block; width: 6px; height: 6px;
  background: var(--accent); border-radius: 50%; margin-right: 8px;
  vertical-align: middle;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 58px; line-height: 1.15; font-weight: 800;
  color: var(--brand); letter-spacing: -.5px;
  margin-bottom: 26px;
}
.hero h1 .underline {
  position: relative; display: inline-block;
  color: var(--accent);
}
.hero h1 .underline::after {
  content: ''; position: absolute;
  bottom: 6px; left: 0; right: 0;
  height: 12px; background: rgba(255,107,53,.18);
  z-index: -1; transform: skewX(-12deg);
}
.hero p.lead {
  font-size: 18px; color: var(--ink-2);
  max-width: 620px; margin: 0 auto 40px;
}
.hero-cta { display: inline-flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 32px;
  font-size: 14.5px; font-weight: 700; letter-spacing: .5px;
  border-radius: 4px;
  transition: all .25s;
}
.btn-primary {
  background: var(--accent); color: #fff !important;
  box-shadow: 0 10px 28px rgba(255,107,53,.32);
}
.btn-primary:hover { background: #e85a2a; color: #fff !important; transform: translateY(-2px); }
.btn-outline {
  background: transparent; color: var(--brand) !important;
  border: 2px solid var(--brand);
}
.btn-outline:hover { background: var(--brand); color: #fff !important; }

/* Hero 数据条 */
.hero-meta {
  display: flex; justify-content: center; gap: 60px;
  margin-top: 70px; padding-top: 40px;
  border-top: 1px dashed rgba(10,37,64,.18);
  position: relative;
}
.meta-item { text-align: center; }
.meta-item strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 38px; color: var(--brand); font-weight: 800;
  line-height: 1;
}
.meta-item span { display: block; margin-top: 6px; font-size: 13px; color: var(--muted); letter-spacing: 1px; }

/* ============ 通用 Section ============ */
.section { padding: 110px 0; }
.section-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 14px; color: var(--accent);
  font-weight: 700; letter-spacing: 3px;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 38px; font-weight: 800;
  color: var(--brand); line-height: 1.25;
  margin-bottom: 14px; letter-spacing: -.3px;
}
.section-sub { color: var(--muted); font-size: 15.5px; max-width: 580px; }

.section-head-split {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 60px; gap: 40px; flex-wrap: wrap;
}
.section-head-split .title-wrap { flex: 1; min-width: 300px; }

/* ============ 服务 — 横向 row 列表(完全不同于第一版的卡片grid) ============ */
.service-row {
  display: grid; grid-template-columns: 80px 1.6fr 1fr 180px 140px;
  align-items: center; gap: 30px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  transition: all .3s;
  position: relative;
}
.service-row:first-child { border-top: 1px solid var(--line); }
.service-row:hover { background: var(--cream); padding-left: 18px; padding-right: 18px; }
.service-row .num {
  font-family: var(--font-serif);
  font-size: 38px; color: var(--brand-3); font-weight: 800;
  opacity: .35;
  transition: color .3s, opacity .3s;
}
.service-row:hover .num { color: var(--accent); opacity: 1; }
.service-row h3 {
  font-family: var(--font-serif);
  font-size: 22px; font-weight: 700; color: var(--brand);
  margin-bottom: 6px;
}
.service-row .desc { color: var(--ink-2); font-size: 14px; line-height: 1.6; }
.service-row .tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  font-size: 12px; color: var(--muted);
}
.service-row .tags span {
  padding: 4px 10px; background: rgba(10,37,64,.06);
  border-radius: 999px;
}
.service-row .row-price {
  font-family: var(--font-serif);
  font-size: 26px; color: var(--accent); font-weight: 800;
}
.service-row .row-price small { font-size: 12px; color: var(--muted); font-weight: 500; margin-left: 4px; }
.service-row .row-cta {
  text-align: right;
}
.service-row .row-cta a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px;
  background: var(--brand); color: #fff !important;
  font-size: 13px; font-weight: 600;
  border-radius: 4px;
  transition: all .25s;
}
.service-row .row-cta a:hover { background: var(--accent); color: #fff !important; }
.service-row .img-thumb {
  width: 80px; height: 80px;
  border-radius: 6px; overflow: hidden;
  cursor: pointer;
  position: relative;
}
.service-row .img-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.service-row .img-thumb:hover img { transform: scale(1.12); }

/* ============ 实力带 — 不同布局(分栏带分隔) ============ */
.strength {
  background: var(--brand);
  color: #fff;
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}
.strength::before {
  content: ''; position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,107,53,.15), transparent 65%);
}
.strength-grid {
  position: relative;
  display: grid; grid-template-columns: 1fr 2fr; gap: 60px; align-items: center;
}
.strength h2 {
  font-family: var(--font-serif);
  font-size: 36px; font-weight: 800; line-height: 1.3;
}
.strength h2 em { color: var(--accent-2); font-style: normal; }
.strength-items {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px;
}
.strength-item {
  padding: 24px;
  background: rgba(255,255,255,.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
}
.strength-item h4 {
  font-size: 18px; font-weight: 700;
  margin-bottom: 8px; color: #fff;
}
.strength-item p { color: rgba(255,255,255,.75); font-size: 14px; }

/* ============ 案例 — 杂志拼图 ============ */
.case-mosaic {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  grid-template-rows: 280px 240px;
  gap: 20px;
}
.case-tile {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.case-tile img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.case-tile:hover img { transform: scale(1.08); }
.case-tile .overlay {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 26px 26px 22px;
  background: linear-gradient(to top, rgba(10,37,64,.92) 10%, transparent 95%);
  color: #fff;
}
.case-tile .overlay .tag {
  display: inline-block;
  padding: 3px 10px; background: var(--accent); color: #fff;
  font-size: 11px; font-weight: 600; letter-spacing: 1px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.case-tile .overlay h4 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.case-tile .overlay p { font-size: 13px; opacity: .85; }
.case-tile.large { grid-column: 1; grid-row: 1 / span 2; }

/* ============ 客户评价 — 时间轴卡 ============ */
.review-wall {
  columns: 3; column-gap: 24px;
}
.review-card {
  break-inside: avoid;
  margin-bottom: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  transition: all .25s;
}
.review-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.stars {
  color: var(--accent); font-size: 14px; letter-spacing: 2px;
  margin-bottom: 14px;
}
.review-card p {
  color: var(--ink-2); font-size: 14.5px; line-height: 1.75;
  margin-bottom: 18px;
  font-family: var(--font-serif);
}
.review-foot {
  display: flex; align-items: center; gap: 12px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.avatar {
  width: 42px; height: 42px;
  border-radius: 4px;
  background: var(--brand); color: var(--accent);
  font-family: var(--font-serif);
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
}
.review-info strong { display: block; font-size: 14px; color: var(--ink); }
.review-info span { font-size: 12px; color: var(--muted); }

/* ============ 流程 / About ============ */
.about-flex {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 70px; align-items: center;
}
.about-img-wrap {
  position: relative;
}
.about-img-wrap img {
  border-radius: var(--radius-lg);
  aspect-ratio: 4/5; object-fit: cover;
  box-shadow: var(--shadow-md);
}
.about-img-wrap::before {
  content: ''; position: absolute;
  top: 20px; left: -20px; right: 20px; bottom: -20px;
  border: 3px solid var(--accent);
  border-radius: var(--radius-lg);
  z-index: -1;
}
.about-flex p { color: var(--ink-2); margin-bottom: 16px; font-size: 15.5px; }
.about-flex p.big {
  font-family: var(--font-serif);
  font-size: 20px; color: var(--brand); font-weight: 600;
  line-height: 1.6;
}

.value-list { list-style: none; margin-top: 28px; }
.value-list li {
  padding: 14px 0; padding-left: 36px; position: relative;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
}
.value-list li::before {
  content: '✦'; position: absolute; left: 0; top: 14px;
  color: var(--accent); font-size: 18px;
}
.value-list li strong { color: var(--brand); margin-right: 8px; }

/* ============ CTA 横幅 ============ */
.cta-wrap {
  background: var(--brand);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 60px 70px;
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  position: relative; overflow: hidden;
}
.cta-wrap::before {
  content: ''; position: absolute;
  top: 0; right: -60px; bottom: 0; width: 320px;
  background: linear-gradient(135deg, transparent, var(--accent));
  opacity: .25;
  transform: skewX(-22deg);
}
.cta-wrap h3 {
  position: relative;
  font-family: var(--font-serif);
  font-size: 30px; font-weight: 800; margin-bottom: 10px;
}
.cta-wrap p { position: relative; opacity: .85; font-size: 15px; }

/* ============ 页脚 ============ */
.footer {
  background: #08172a;
  color: rgba(255,255,255,.65);
  padding: 70px 0 26px;
  font-size: 14px;
}
.footer-top {
  display: grid; grid-template-columns: 1.8fr repeat(3, 1fr);
  gap: 50px; margin-bottom: 50px;
}
.footer h5 {
  color: #fff; font-size: 13px; font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 20px; text-transform: uppercase;
}
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 12px; font-size: 13.5px; }
.footer a:hover { color: var(--accent-2); }
.footer .brand-row .logo { color: #fff; margin-bottom: 16px; }
.footer .brand-row .logo .logo-mark { background: #fff; color: var(--brand); }
.footer .brand-row p { line-height: 1.8; opacity: .75; }
.footer-base {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex; flex-wrap: wrap; gap: 14px;
  justify-content: space-between; font-size: 13px; opacity: .65;
}
.footer-base a { color: var(--accent-2); }
.footer-base a:hover { text-decoration: underline; }

/* ============ 漂浮按钮 — 客服在左下,返回顶部在右下 ============ */
.fab-chat {
  position: fixed; left: 24px; bottom: 30px; z-index: 60;
  width: 60px; height: 60px;
  background: var(--accent); color: #fff;
  display: grid; place-items: center;
  border-radius: 50%;
  font-size: 24px;
  box-shadow: 0 14px 30px rgba(255,107,53,.4);
  transition: all .25s;
}
.fab-chat:hover { transform: scale(1.1) rotate(-8deg); }
.fab-top {
  position: fixed; right: 24px; bottom: 30px; z-index: 60;
  width: 48px; height: 48px;
  background: var(--brand); color: #fff;
  border-radius: 50%;
  display: none; place-items: center;
  font-size: 18px;
  box-shadow: var(--shadow-md);
  transition: all .25s;
}
.fab-top.show { display: grid; }
.fab-top:hover { background: var(--accent); transform: translateY(-3px); }

/* ============ 客服浮窗(左下展开) ============ */
.chat-panel {
  position: fixed; left: 24px; bottom: 110px; z-index: 70;
  width: 320px; max-width: calc(100vw - 48px);
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 30px 80px rgba(10,37,64,.32);
  display: none; flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
}
.chat-panel.open { display: flex; }
.chat-head {
  background: var(--brand);
  color: #fff; padding: 18px 20px;
  display: flex; justify-content: space-between; align-items: center;
}
.chat-head strong { font-size: 15px; }
.chat-head small { display: block; font-size: 11px; opacity: .8; margin-top: 2px; }
.chat-close { color: #fff; font-size: 20px; }
.chat-body { padding: 18px; max-height: 280px; overflow-y: auto; }
.msg {
  padding: 11px 14px; border-radius: 10px;
  font-size: 13.5px; margin-bottom: 10px; max-width: 88%;
  line-height: 1.5;
}
.msg.bot { background: var(--accent-soft); color: var(--ink-2); border-bottom-left-radius: 3px; }
.msg.user { background: var(--brand); color: #fff; margin-left: auto; border-bottom-right-radius: 3px; }
.chat-foot {
  display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line);
}
.chat-foot input {
  flex: 1; padding: 11px 16px; border-radius: 999px;
  border: 1px solid var(--line); font-size: 13.5px; outline: none;
  font-family: inherit;
}
.chat-foot input:focus { border-color: var(--accent); }
.chat-foot button {
  padding: 0 18px; border-radius: 999px;
  background: var(--accent); color: #fff; font-size: 13px; font-weight: 700;
}

/* ============ 表单 (下单) ============ */
.checkout-grid { display: grid; grid-template-columns: 1.3fr .9fr; gap: 50px; }
.form-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 36px;
}
.form-step {
  display: flex; gap: 14px; align-items: center;
  margin-top: 28px; margin-bottom: 18px;
}
.form-step:first-child { margin-top: 0; }
.form-step .n {
  width: 32px; height: 32px;
  background: var(--brand); color: var(--accent);
  border-radius: 4px; font-family: var(--font-serif);
  display: grid; place-items: center; font-weight: 800;
}
.form-step h3 { font-size: 18px; font-family: var(--font-serif); color: var(--brand); }
.field { margin-bottom: 18px; }
.field label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--ink-2); margin-bottom: 7px;
}
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 16px;
  border-radius: 6px;
  border: 1.5px solid var(--line); font-size: 14px;
  font-family: inherit; outline: none; transition: border .2s;
  background: #fafafa;
}
.field textarea { resize: vertical; min-height: 100px; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent); background: #fff;
}
.field-row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pay-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.pay-options label {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 18px 12px;
  border: 1.5px solid var(--line); border-radius: 8px;
  cursor: pointer; font-size: 13px; transition: all .25s;
  text-align: center;
}
.pay-options input { display: none; }
.pay-options label:has(input:checked) {
  border-color: var(--accent); background: var(--accent-soft);
  color: var(--brand); font-weight: 700;
}
.pay-options .icn { font-size: 22px; }

.cart-side {
  background: var(--brand); color: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  height: fit-content; position: sticky; top: 96px;
}
.cart-side h4 {
  font-family: var(--font-serif); font-size: 18px; margin-bottom: 22px;
  padding-bottom: 14px; border-bottom: 1px solid rgba(255,255,255,.15);
}
.cart-line { display: flex; gap: 14px; margin-bottom: 20px; }
.cart-line img { width: 70px; height: 70px; object-fit: cover; border-radius: 6px; }
.cart-line .info strong { display: block; font-size: 14.5px; }
.cart-line .info span { font-size: 12px; opacity: .7; }
.cart-line .info .p { color: var(--accent-2); font-weight: 700; margin-top: 4px; font-size: 15px; }
.cart-row {
  display: flex; justify-content: space-between;
  padding: 8px 0; font-size: 14px; opacity: .85;
}
.cart-total {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-top: 14px; padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.15);
  font-size: 16px; font-weight: 700;
}
.cart-total .big {
  font-family: var(--font-serif);
  font-size: 28px; color: var(--accent-2);
}
.submit-btn {
  width: 100%; margin-top: 22px;
  padding: 15px; border-radius: 6px;
  background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 700; letter-spacing: 1px;
  transition: background .25s, transform .15s;
}
.submit-btn:hover { background: #e85a2a; transform: translateY(-1px); }

/* ============ 商品详情 ============ */
.product-hero { display: grid; grid-template-columns: 1fr 1.05fr; gap: 60px; align-items: flex-start; }
.pd-img-wrap {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 4/5; box-shadow: var(--shadow-md);
}
.pd-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.pd-info .breadcrumb {
  font-size: 12px; color: var(--muted); letter-spacing: 1.5px;
  margin-bottom: 16px;
}
.pd-info .breadcrumb a { color: var(--muted); }
.pd-info h1 {
  font-family: var(--font-serif);
  font-size: 38px; line-height: 1.2;
  color: var(--brand); font-weight: 800;
  margin-bottom: 14px;
}
.pd-info .summary { color: var(--ink-2); font-size: 15.5px; line-height: 1.7; }
.pd-info .price-box {
  background: var(--cream);
  border-left: 4px solid var(--accent);
  padding: 20px 22px;
  margin: 24px 0;
  border-radius: 0 8px 8px 0;
}
.pd-info .price-now {
  font-family: var(--font-serif);
  font-size: 40px; color: var(--accent); font-weight: 800; line-height: 1;
}
.pd-info .price-now small {
  font-size: 14px; color: var(--muted); font-weight: 500; margin-left: 8px;
}
.pd-info .price-tag { font-size: 13px; color: var(--muted); margin-top: 6px; }
.feat-bullets { list-style: none; margin: 20px 0; }
.feat-bullets li {
  padding: 10px 0; padding-left: 28px; position: relative;
  color: var(--ink-2); font-size: 14.5px;
  border-bottom: 1px dashed var(--line);
}
.feat-bullets li::before {
  content: ''; position: absolute;
  left: 4px; top: 18px;
  width: 8px; height: 8px;
  background: var(--accent); transform: rotate(45deg);
}
.pd-actions { display: flex; gap: 12px; margin-top: 24px; }

.pd-section { margin-top: 80px; }
.pd-section .lbl {
  font-family: var(--font-serif);
  display: inline-block;
  padding: 6px 16px; background: var(--accent-soft);
  color: var(--accent); font-weight: 700;
  font-size: 13px; letter-spacing: 2px;
  margin-bottom: 14px;
  border-radius: 4px;
}
.pd-section h2 {
  font-family: var(--font-serif);
  font-size: 28px; color: var(--brand); font-weight: 800;
  margin-bottom: 30px;
}
.detail-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.detail-row .card-d {
  background: #fff; padding: 26px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  transition: all .25s;
}
.detail-row .card-d:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.detail-row .card-d .step-n {
  display: inline-block;
  width: 38px; height: 38px;
  background: var(--brand); color: var(--accent);
  font-family: var(--font-serif);
  border-radius: 4px;
  display: grid; place-items: center;
  font-weight: 800; font-size: 18px;
  margin-bottom: 14px;
}
.detail-row .card-d h4 { font-size: 16px; color: var(--brand); margin-bottom: 8px; font-weight: 700; }
.detail-row .card-d p { color: var(--ink-2); font-size: 14px; line-height: 1.7; }

/* ============ 联系页 ============ */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.c-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  text-align: left;
  transition: all .3s;
  position: relative; overflow: hidden;
}
.c-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; height: 4px; width: 0;
  background: var(--accent);
  transition: width .3s;
}
.c-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.c-card:hover::before { width: 100%; }
.c-card .icn {
  width: 54px; height: 54px;
  background: var(--cream); color: var(--accent);
  display: grid; place-items: center;
  border-radius: 8px;
  margin-bottom: 18px;
  font-size: 24px;
}
.c-card h4 { font-family: var(--font-serif); font-size: 18px; color: var(--brand); margin-bottom: 8px; }
.c-card p { color: var(--ink-2); font-size: 14px; line-height: 1.7; }

/* ============ 关于页时间轴(改成左右对称) ============ */
.tl {
  position: relative;
  padding: 0;
  margin-top: 40px;
}
.tl::before {
  content: ''; position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 2px; background: var(--line);
  transform: translateX(-50%);
}
.tl-item {
  display: grid; grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  margin-bottom: 36px;
}
.tl-item .dot {
  width: 16px; height: 16px;
  background: var(--accent);
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: 0 0 0 2px var(--accent);
  margin: 0 auto;
}
.tl-item .yr {
  font-family: var(--font-serif);
  font-size: 28px; color: var(--brand); font-weight: 800;
}
.tl-item .body {
  background: #fff; padding: 18px 22px;
  border-radius: 8px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.tl-item .body h4 { font-size: 16px; color: var(--brand); margin-bottom: 4px; }
.tl-item .body p { font-size: 13.5px; color: var(--muted); }
.tl-item.left .yr { text-align: right; padding-right: 28px; grid-column: 1; }
.tl-item.left .body { grid-column: 3; margin-left: 28px; }
.tl-item.right .body { grid-column: 1; margin-right: 28px; text-align: right; }
.tl-item.right .yr { text-align: left; padding-left: 28px; grid-column: 3; }

/* ============ 工具 ============ */
.divider { height: 1px; background: var(--line); margin: 60px 0; }
.text-c { text-align: center; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .service-row { grid-template-columns: 60px 1fr 1fr 140px 130px; gap: 20px; }
  .service-row .img-thumb { width: 70px; height: 70px; }
}
@media (max-width: 820px) {
  .nav-links { display: none; }
  .hero { padding: 70px 0 90px; }
  .hero h1 { font-size: 36px; }
  .hero p.lead { font-size: 16px; }
  .hero-meta { gap: 30px; }
  .meta-item strong { font-size: 28px; }
  .section { padding: 70px 0; }
  .section-title { font-size: 28px; }
  .service-row {
    grid-template-columns: 1fr;
    text-align: left; gap: 14px;
    padding: 24px 0;
  }
  .service-row .num { font-size: 30px; }
  .service-row .img-thumb { width: 100%; height: 180px; }
  .service-row .row-cta { text-align: left; }
  .strength-grid { grid-template-columns: 1fr; gap: 36px; }
  .strength-items { grid-template-columns: 1fr; }
  .case-mosaic {
    grid-template-columns: 1fr; grid-template-rows: repeat(5, 220px); gap: 16px;
  }
  .case-tile.large { grid-column: auto; grid-row: auto; }
  .review-wall { columns: 1; }
  .about-flex, .product-hero, .checkout-grid {
    grid-template-columns: 1fr; gap: 36px;
  }
  .cta-wrap { flex-direction: column; text-align: center; padding: 40px 30px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .detail-row { grid-template-columns: 1fr; }
  .tl::before { left: 20px; }
  .tl-item { grid-template-columns: 40px 1fr; }
  .tl-item .yr, .tl-item.left .yr, .tl-item.right .yr {
    grid-column: 2; text-align: left; padding: 0 0 4px 0; font-size: 22px;
  }
  .tl-item .dot { grid-column: 1; margin: 0; }
  .tl-item .body, .tl-item.left .body, .tl-item.right .body {
    grid-column: 2; margin: 0; text-align: left;
  }
  .pd-info h1 { font-size: 28px; }
  .pd-info .price-now { font-size: 32px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 28px; }
  .contact-cards { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .pay-options { grid-template-columns: 1fr; }
  .field-row2 { grid-template-columns: 1fr; }
  .form-block { padding: 24px 22px; }
  .cta-wrap { padding: 32px 22px; }
}