:root {
  --cream: #faf6ef; --sand: #f0e8da; --sand-2: #e6dac6; --ink: #2a2621; --muted: #6f665b; --line: #e4dacb;
  --accent: #7a5c3e; --accent-dark: #5f452c; --olive: #56603f;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--cream); color: var(--ink); font: 16px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.2; margin: 0; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
.wrap { width: min(1160px, 100% - 48px); margin-inline: auto; }
.narrow { width: min(780px, 100% - 48px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 6px; z-index: 100; }
.skip:focus { left: 12px; }

/* 页头 */
header.site { position: sticky; top: 0; z-index: 50; background: rgba(250, 246, 239, .92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 24px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.mark { width: 38px; height: 38px; border-radius: 10px; background: var(--accent); color: var(--cream); display: inline-grid; place-items: center; font: 500 21px/1 var(--serif); flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text b { font: 600 17px/1.2 var(--serif); letter-spacing: .02em; }
.brand-text small { font-size: 11.5px; color: var(--muted); letter-spacing: .04em; }
nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
nav a.opt { text-decoration: none; color: var(--ink); padding: 8px 12px; border-radius: 8px; font-size: 15px; }
nav a.opt:hover, nav a[aria-current] { color: var(--accent); background: var(--sand); }
.btn { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; background: var(--accent); color: #fff; padding: 13px 26px; border-radius: 999px; font-weight: 600; border: 1px solid var(--accent); transition: background .2s, transform .2s; }
.btn:hover { background: var(--accent-dark); transform: translateY(-1px); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }
.btn.small { padding: 8px 18px; font-size: 14px; margin-left: 8px; }
.lang { white-space: nowrap; flex: none; margin-left: 8px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px; padding: 6px 14px; font: inherit; font-size: 14px; cursor: pointer; }
.lang:hover { border-color: var(--accent); color: var(--accent); }

/* 首屏 */
.hero { padding: 72px 0 80px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .16em; font-size: 12.5px; color: var(--accent); font-weight: 600; margin-bottom: 18px; }
.zh .eyebrow, .eyebrow.zh { letter-spacing: .12em; text-transform: none; }
.hero h1 { font-size: clamp(40px, 5.6vw, 68px); line-height: 1.06; margin-bottom: 22px; }
.hero .lead { font-size: 18.5px; color: var(--muted); max-width: 520px; margin-bottom: 32px; }
.cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-img { position: relative; }
.hero-img img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 220px 220px 20px 20px; box-shadow: 0 30px 60px -28px rgba(70, 48, 24, .45); }
.hero-img::before { content: ""; position: absolute; inset: 22px -22px -22px 22px; border: 1px solid var(--sand-2); border-radius: 220px 220px 20px 20px; z-index: -1; }

/* 三个卖点 */
.values { border-block: 1px solid var(--line); background: #fff; }
.values .wrap { display: grid; grid-template-columns: repeat(3, 1fr); }
.value { padding: 34px 32px; border-left: 1px solid var(--line); }
.value:first-child { border-left: 0; padding-left: 0; }
.value h3 { font-size: 21px; margin-bottom: 8px; }
.value p { color: var(--muted); margin: 0; font-size: 15.5px; }
.value .n { font: 500 14px var(--serif); color: var(--accent); letter-spacing: .1em; margin-bottom: 10px; display: block; }

/* 通栏横幅 */
.banner { padding: 96px 0 0; }
.banner figure { margin: 0; position: relative; border-radius: 24px; overflow: hidden; }
.banner img { width: 100%; height: clamp(320px, 52vw, 600px); object-fit: cover; object-position: 50% 40%; }
.banner figcaption { position: absolute; left: clamp(18px, 4vw, 48px); bottom: clamp(18px, 4vw, 48px); background: rgba(250, 246, 239, .94); padding: 26px 32px; border-radius: 16px; max-width: 420px; }
.banner figcaption h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 8px; }
.banner figcaption p { margin: 0; color: var(--muted); font-size: 15.5px; }

section.block { padding: 96px 0 0; }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 44px); margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 17.5px; margin: 0; }

/* 产品卡片 */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; display: flex; flex-direction: column; transition: transform .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 22px 40px -26px rgba(70, 48, 24, .4); }
.card img { width: 100%; aspect-ratio: 4 / 3.4; object-fit: cover; }
.card .ph { aspect-ratio: 4 / 3.4; background: linear-gradient(135deg, var(--sand), var(--sand-2)); display: grid; place-items: center; }
.card .ph svg { width: 64px; height: 64px; stroke: var(--accent); fill: none; stroke-width: 1.4; }
.card .body { padding: 24px 26px 28px; }
.card h3 { font-size: 22px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15.5px; margin: 0; }

/* 面料 */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split img { border-radius: 22px; width: 100%; aspect-ratio: 1; object-fit: cover; }
.split h2 { font-size: clamp(30px, 3.6vw, 44px); margin-bottom: 18px; }
.split p.lead { color: var(--muted); font-size: 17.5px; }
.ticks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.ticks li { position: relative; padding-left: 34px; margin: 0; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 4px; width: 20px; height: 20px; border-radius: 50%; background: var(--sand) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='%237a5c3e' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 20px no-repeat; }

/* 关于 / 销售渠道 */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px; }
.about-grid h2 { font-size: clamp(30px, 3.6vw, 44px); }
.facts { display: grid; gap: 0; border-top: 1px solid var(--line); }
.facts div { display: flex; justify-content: space-between; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.facts dt { color: var(--muted); } .facts dd { margin: 0; font-weight: 500; text-align: right; }
dl.facts { margin: 0; }

/* 技术与数据 */
.tech { background: var(--olive); color: #f3f0e6; border-radius: 26px; padding: clamp(32px, 5vw, 64px); display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.tech h2 { font-size: clamp(28px, 3.2vw, 40px); margin-bottom: 16px; color: #fff; }
.tech p { color: #e6e2d3; }
.tech a { color: #fff; }
.tech ul { padding-left: 20px; margin: 0 0 1em; } .tech li { margin: 8px 0; color: #e6e2d3; }
.tech .note { background: rgba(255, 255, 255, .1); border-radius: 12px; padding: 14px 18px; color: #fff; margin-top: 18px; }

/* 联系 */
.contact { background: var(--sand); border-radius: 26px; padding: clamp(36px, 6vw, 72px); text-align: center; }
.contact h2 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 14px; }
.contact p { color: var(--muted); max-width: 560px; margin-inline: auto; }
.contact .mail { font: 500 clamp(20px, 3vw, 30px) var(--serif); margin: 22px 0 26px; }
.contact .meta { margin-top: 28px; font-size: 14.5px; }

/* 页脚 */
footer.site { margin-top: 110px; background: var(--ink); color: #d9d2c6; padding-top: 64px; }
.foot { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.foot-brand { display: flex; gap: 12px; align-items: center; color: #fff; font: 500 18px var(--serif); margin-bottom: 14px; }
footer.site h4 { color: #fff; font: 600 14px var(--sans); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; }
footer.site a { display: block; color: #d9d2c6; text-decoration: none; padding: 4px 0; }
footer.site a:hover { color: #fff; text-decoration: underline; }
footer.site p { color: #b3aa9b; font-size: 14.5px; max-width: 340px; }
.muted-line { display: block; padding: 4px 0; color: #b3aa9b; }
.muted-line a { display: inline; }
.legal { border-top: 1px solid rgba(255, 255, 255, .14); padding: 22px 0 34px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 13.5px; color: #9d9486; }

/* 隐私页 */
.page-head { padding: 72px 0 36px; border-bottom: 1px solid var(--line); background: #fff; }
.page-head h1 { font-size: clamp(36px, 5vw, 54px); margin-bottom: 10px; }
.doc { padding: 48px 0 0; }
.doc h2 { font-size: 26px; margin: 40px 0 12px; }
.doc p, .doc li { color: #433d35; }
.doc table { border-collapse: collapse; width: 100%; margin: 14px 0 20px; font-size: 15px; background: #fff; border-radius: 12px; overflow: hidden; }
.doc th, .doc td { border: 1px solid var(--line); padding: 12px 16px; text-align: left; vertical-align: top; }
.doc th { background: var(--sand); font-weight: 600; }
.muted { color: var(--muted); }
mark.todo { background: #fff3b0; color: #7a5b00; padding: 0 6px; border-radius: 4px; }

/* 双语切换：两种语言都写在页面里，用 data-lang 控制显示；没开 JS 时默认显示英文 */
html[data-lang="en"] .zh, html[data-lang="zh"] .en { display: none !important; }

/* 滚动出现（仅在有 JS 时启用，没有 JS 时内容始终可见） */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

@media (max-width: 960px) {
  .hero .wrap, .split, .about-grid, .tech { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 44px 0 56px; }
  .hero-img { max-width: 520px; }
  .cards { grid-template-columns: 1fr; }
  .values .wrap { grid-template-columns: 1fr; }
  .value, .value:first-child { border-left: 0; border-top: 1px solid var(--line); padding: 24px 0; }
  .value:first-child { border-top: 0; }
  .foot { grid-template-columns: 1fr 1fr; }
  .foot > div:first-child { grid-column: 1 / -1; }
  .banner, section.block { padding-top: 64px; }
}
@media (max-width: 720px) {
  nav a.opt { display: none; }
  .bar { gap: 12px; }
  .btn.small { margin-left: 0; padding: 8px 14px; white-space: nowrap; }
  .lang { margin-left: 4px; padding: 6px 12px; }
  .brand-text small { display: none; }
  .banner figcaption { position: static; border-radius: 0 0 16px 16px; max-width: none; }
  .banner figure { border-radius: 16px; }
  .banner img { height: 300px; }
}