/* ============================================================
   NatroVia 官网 v2 — 编辑风设计
   暖纸底色 + 深墨绿 + Fraunces 衬线标题 + Inter 正文 + 发丝线
   ============================================================ */
:root {
  --paper: #f7f5ee;
  --paper-2: #efece1;
  --card: #fffdf7;
  --ink: #182a21;
  --body: #3d4c43;
  --muted: #5a675d;
  --green: #1b5a40;
  --green-deep: #0f3d2a;
  --leaf: #58a942;
  --line: #ddd7c6;
  --line-soft: #e7e2d3;
  --radius: 10px;
  --maxw: 1180px;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 96px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--body);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--ink); line-height: 1.12; letter-spacing: -0.015em; }
h4 { color: var(--ink); }

.kicker {
  font-size: 12px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--green); display: flex; align-items: center; gap: 10px;
}
.kicker::before { content: ""; width: 26px; height: 1px; background: var(--leaf); flex: none; }

.lede { font-size: clamp(16px, 1.5vw, 19px); color: var(--body); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-size: 14.5px; font-weight: 600; letter-spacing: 0.01em;
  padding: 11px 22px; border-radius: 7px; border: 1px solid transparent;
  cursor: pointer; transition: background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
}
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-solid { background: var(--green); color: #fdfcf7; }
.btn-solid:hover { background: var(--green-deep); transform: translateY(-1px); }
.btn-line { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-line:hover { border-color: var(--green); color: var(--green); }

/* ---------- 顶栏 + 导航 ---------- */
.topbar { background: var(--green-deep); color: rgba(250, 248, 240, 0.85); font-size: 13px; }
.topbar-in { display: flex; justify-content: space-between; align-items: center; height: 36px; }
.topbar-mail:hover { color: #fff; }
.lang-wrap { display: inline-flex; align-items: center; gap: 7px; }
.lang-globe { display: inline-flex; opacity: 0.8; }
.lang-wrap select {
  background: transparent; color: inherit; border: none; font: inherit; cursor: pointer;
  padding-right: 2px;
}
.lang-wrap select:focus-visible { outline: 2px solid var(--leaf); outline-offset: 2px; border-radius: 3px; }
.lang-wrap select option { color: var(--ink); }

.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(247, 245, 238, 0.92); backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
}
.nav.scrolled { box-shadow: 0 6px 24px rgba(24, 42, 33, 0.08); }
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 74px; gap: 24px; }
.brand img { height: 40px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--body); position: relative; }
.nav-links a:hover { color: var(--green); }
.nav-links a.btn-solid { color: #fdfcf7; }
.nav-links a.btn-solid:hover { color: #fff; background: var(--green-deep); }
.nav-right { display: flex; align-items: center; gap: 14px; }
.nav-cta-m { display: none; }
.burger { display: none; background: none; border: none; cursor: pointer; padding: 10px 4px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; transition: transform .2s, opacity .2s; }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 84px; position: relative; overflow: hidden; }
.hero::after {
  content: ""; position: absolute; right: -220px; top: -220px; width: 560px; height: 560px;
  border-radius: 50%; background: radial-gradient(circle, rgba(88, 169, 66, 0.10), transparent 65%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 64px; align-items: center; position: relative; }
.hero-copy .kicker { margin-bottom: 22px; }
.hero h1 { font-size: clamp(38px, 4.6vw, 62px); margin-bottom: 22px; }
.hero .lede { max-width: 520px; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats {
  display: flex; gap: 0; margin-top: 52px; border-top: 1px solid var(--line);
  padding-top: 26px; max-width: 540px;
}
.hero-stats > div { flex: 1; padding-right: 20px; }
.hero-stats > div + div { border-left: 1px solid var(--line); padding-left: 24px; }
.hero-stats dt { font-family: var(--serif); font-size: 32px; font-weight: 600; color: var(--green); line-height: 1; }
.hero-stats dd { font-size: 13px; color: var(--muted); margin-top: 7px; }

.hero-media { position: relative; justify-self: end; width: min(440px, 100%); }
.hero-media img {
  width: 100%; height: 540px; object-fit: cover;
  border-radius: 220px 220px var(--radius) var(--radius);
  border: 1px solid var(--line);
  box-shadow: 0 30px 70px rgba(15, 61, 42, 0.16);
}
.hero-media::before {
  content: ""; position: absolute; inset: -14px 14px 14px -14px; z-index: -1;
  border: 1px solid var(--line); border-radius: 230px 230px 14px 14px;
}
.hero-chip {
  position: absolute; left: -18px; bottom: 34px;
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 10px 18px; font-size: 13.5px; font-weight: 600; color: var(--ink);
  box-shadow: 0 10px 30px rgba(15, 61, 42, 0.12);
}
.hero-chip .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--leaf); flex: none; }

/* ---------- 通用 section ---------- */
.section { padding: 88px 0; }
.section-tint { background: var(--paper-2); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head .kicker { margin-bottom: 16px; }
.section-head h2 { font-size: clamp(28px, 3.2vw, 42px); }
.section-sub { margin-top: 14px; color: var(--muted); font-size: 16.5px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
.about-lede {
  font-family: var(--serif); font-size: clamp(20px, 2.1vw, 26px); line-height: 1.45;
  color: var(--ink); font-weight: 500;
}
.about-rest p { margin-bottom: 16px; color: var(--body); }
.values {
  list-style: none; counter-reset: v; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 28px; margin-top: 56px;
}
.values li { counter-increment: v; border-top: 2px solid var(--ink); padding-top: 18px; }
.values li::before {
  content: counter(v, decimal-leading-zero);
  font-family: var(--serif); font-size: 14px; color: var(--leaf); font-weight: 600;
  display: block; margin-bottom: 10px; letter-spacing: 0.08em;
}
.values h3 { font-size: 18px; margin-bottom: 8px; font-family: var(--sans); font-weight: 600; }
.values p { font-size: 14px; color: var(--muted); }

/* ---------- 产品索引 ---------- */
.cat-group { margin-bottom: 40px; }
.cat-group-title {
  font-family: var(--sans); font-size: 13px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 14px;
}
.cat-index { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.cat-row {
  display: grid; grid-template-columns: 64px 1fr auto 46px; align-items: center;
  padding: 20px 26px 20px 20px; border-bottom: 1px solid var(--line-soft);
  transition: background .15s ease;
}
.cat-row:last-child { border-bottom: none; }
.cat-row:hover { background: var(--paper-2); }
.cat-no { font-family: var(--serif); font-size: 14px; color: var(--leaf); font-weight: 600; }
.cat-name { font-family: var(--serif); font-size: clamp(19px, 2vw, 24px); font-weight: 600; color: var(--ink); }
.cat-count { font-size: 13.5px; color: var(--muted); white-space: nowrap; margin-right: 18px; }
.cat-arrow { color: var(--line); display: inline-flex; justify-content: flex-end; transition: color .15s, transform .15s; }
.cat-row:hover .cat-arrow { color: var(--green); transform: translateX(4px); }

/* ---------- 服务 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.svc { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; display: flex; flex-direction: column; }
.svc-media { height: 210px; overflow: hidden; border-bottom: 1px solid var(--line-soft); }
.svc-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.svc:hover .svc-media img { transform: scale(1.04); }
.svc h3 { font-size: 20px; margin: 22px 24px 10px; }
.svc p { font-size: 14.5px; color: var(--muted); margin: 0 24px 26px; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 32px; align-items: start; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.form { padding: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: block; margin-bottom: 18px; }
.form label span { display: block; font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.form input, .form textarea {
  width: 100%; font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 7px; padding: 11px 13px;
  transition: border-color .15s, box-shadow .15s;
}
.form input:focus, .form textarea:focus {
  outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(27, 90, 64, 0.12); background: #fff;
}
.form textarea { resize: vertical; min-height: 120px; }
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-msg { color: #a43b2a; font-size: 14px; margin: -6px 0 14px; }
.form-success { padding: 48px 36px; text-align: center; }
.ok-badge {
  width: 58px; height: 58px; border-radius: 50%; margin: 0 auto 18px;
  background: rgba(88, 169, 66, 0.14); color: var(--green);
  display: grid; place-items: center;
}
.form-success h3 { font-size: 24px; margin-bottom: 10px; }
.form-success p { color: var(--muted); margin-bottom: 24px; }
.contact-side { display: grid; gap: 18px; }
.side-card { padding: 26px; }
.side-card h4 { font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; font-weight: 600; }
.side-mail { font-family: var(--serif); font-size: 20px; color: var(--green); font-weight: 600; word-break: break-all; }
.side-mail:hover { color: var(--green-deep); }
.side-note { font-size: 13.5px; color: var(--muted); margin-top: 10px; }
.side-card p { font-size: 14.5px; color: var(--body); }

/* ---------- 产品页 ---------- */
.p-band { padding: 56px 0 44px; border-bottom: 1px solid var(--line-soft); background: var(--paper-2); }
.crumbs { font-size: 13.5px; color: var(--muted); display: flex; gap: 9px; margin-bottom: 26px; flex-wrap: wrap; }
.crumbs a:hover { color: var(--green); }
.crumbs b { color: var(--ink); font-weight: 600; }
.p-band .kicker { margin-bottom: 14px; }
.p-band h1 { font-size: clamp(32px, 4vw, 52px); }
.p-intro { margin-top: 16px; max-width: 640px; }
.p-list { padding-top: 46px; }
.p-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-bottom: 18px; flex-wrap: wrap; }
.p-count { font-size: 14px; color: var(--muted); }
.p-count b { font-family: var(--serif); color: var(--ink); font-size: 17px; }
.p-filter {
  font: inherit; font-size: 14px; padding: 10px 16px; min-width: 280px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--ink);
}
.p-filter:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(27, 90, 64, 0.1); }
.table-wrap { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow-x: auto; }
.p-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.p-table th {
  text-align: left; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); font-weight: 600; padding: 14px 18px;
  border-bottom: 1px solid var(--line); background: var(--paper-2);
  position: sticky; top: 0;
}
.p-table td { padding: 14px 18px; border-bottom: 1px solid var(--line-soft); font-size: 14.5px; vertical-align: top; }
.p-table tbody tr:last-child td { border-bottom: none; }
.p-table tbody tr:hover { background: var(--paper); }
.td-name { font-weight: 600; color: var(--ink); min-width: 200px; }
.td-cas { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; font-size: 13px; color: var(--body); white-space: nowrap; }
.td-act { text-align: right; white-space: nowrap; }
.inq-link { font-size: 13.5px; font-weight: 600; color: var(--green); opacity: 0; transition: opacity .12s; }
.p-table tr:hover .inq-link,
.p-table tr:focus-within .inq-link { opacity: 1; }
.inq-link:focus-visible { opacity: 1; outline: 2px solid var(--leaf); outline-offset: 2px; border-radius: 3px; }
@media (hover: none) { .inq-link { opacity: 1; } }
.p-empty { padding: 40px; text-align: center; color: var(--muted); }

.p-cta {
  margin-top: 40px; padding: 36px 40px; border-radius: var(--radius);
  background: var(--green-deep); color: rgba(250, 248, 240, 0.85);
  display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap;
}
.p-cta h2 { color: #fdfcf7; font-size: clamp(20px, 2.4vw, 28px); margin-bottom: 8px; }
.p-cta p { max-width: 560px; font-size: 14.5px; }
.p-cta .btn-solid { background: var(--leaf); }
.p-cta .btn-solid:hover { background: #4c9538; }

.p-others { margin-top: 56px; }
.p-others h3 { font-family: var(--sans); font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; font-weight: 600; }
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  padding: 9px 18px; font-size: 14px; font-weight: 500; color: var(--ink);
  transition: border-color .15s, color .15s, transform .15s;
}
.chip small { color: var(--muted); margin-left: 4px; }
.chip:hover { border-color: var(--green); color: var(--green); transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.footer { background: var(--green-deep); color: rgba(250, 248, 240, 0.72); padding: 58px 0 28px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 44px; padding-bottom: 38px; }
.footer-logo { height: 36px; width: auto; margin-bottom: 16px; filter: brightness(0) invert(1) opacity(0.92); }
.footer-brand p { max-width: 320px; font-size: 14.5px; }
.footer h4 { color: #fdfcf7; font-size: 12.5px; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 16px; }
.footer ul { list-style: none; display: grid; gap: 10px; font-size: 14.5px; }
.footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(250, 248, 240, 0.16); padding-top: 22px; font-size: 13px; color: rgba(250, 248, 240, 0.55); }

/* ---------- 404 ---------- */
.nf-in { min-height: 50vh; display: grid; place-content: center; text-align: center; gap: 18px; padding: 80px 24px; }
.nf h1 { font-size: clamp(32px, 5vw, 56px); }

/* ---------- 进场动画(轻,且尊重减动效) ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-media { justify-self: start; }
  .hero-media img { height: 420px; }
  .about-grid { grid-template-columns: 1fr; gap: 24px; }
  .values { grid-template-columns: repeat(2, 1fr); }
  .svc-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .topbar-in { font-size: 12px; }
  .nav-cta { display: none; }
}
@media (max-width: 1020px) {
  .burger { display: block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 74px;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 10px 24px 18px;
    box-shadow: 0 18px 36px rgba(24, 42, 33, 0.1);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 2px; border-bottom: 1px solid var(--line-soft); }
  .nav-links a:last-of-type { border-bottom: none; }
  .nav-cta-m { display: inline-flex; margin-top: 12px; }
}
@media (max-width: 720px) {
  .hero { padding: 48px 0 60px; }
  .hero-stats { max-width: none; }
  .hero-stats dt { font-size: 26px; }
  .hero-media img { height: 340px; border-radius: 170px 170px var(--radius) var(--radius); }
  .hero-media::before { border-radius: 180px 180px 14px 14px; }
  .section { padding: 60px 0; }
  .values { grid-template-columns: 1fr; gap: 20px; }
  .svc-grid { grid-template-columns: 1fr; }
  .cat-row { grid-template-columns: 40px 1fr auto; padding: 16px 16px; }
  .cat-arrow { display: none; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .p-filter { min-width: 0; width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}