/* ============================================================
   Hebei Hanyuan Trading - Website v3
   Modern B2B ingredient supplier design system
   Palette: deep forest green + amber (sugarcane / natural)
   ============================================================ */
:root {
  --green-deep: #0b3d2c;
  --green-dark: #105a3e;
  --green: #177e52;
  --green-mid: #2aa36f;
  --green-soft: #e8f5ee;
  --amber: #f2a93b;
  --amber-dark: #d98c1d;
  --amber-soft: #fdf1dc;
  --ink: #16231c;
  --body: #46574d;
  --muted: #7d8f84;
  --line: #e4ece7;
  --bg: #f6faf7;
  --white: #ffffff;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow-sm: 0 2px 10px rgba(11, 61, 44, .06);
  --shadow-md: 0 12px 32px rgba(11, 61, 44, .10);
  --shadow-lg: 0 24px 60px rgba(11, 61, 44, .16);
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--body);
  line-height: 1.68;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s; }
.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 16px; }
.logo { font-size: 1.08rem; font-weight: 800; letter-spacing: .04em; color: var(--green-deep); line-height: 1.12; }
.logo b { color: var(--green); }
.logo small { display: block; font-size: .6rem; font-weight: 600; letter-spacing: .2em; color: var(--muted); margin-top: 3px; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; }
.nav-links a { font-size: .94rem; font-weight: 500; color: #3d4e44; position: relative; padding: 4px 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2.5px;
  background: var(--green-mid); border-radius: 3px; transition: width .25s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a:hover, .nav-links a.active { color: var(--green-dark); font-weight: 700; }
.nav-cta { margin-left: 4px; }
.lang-select {
  border: 1px solid var(--line); border-radius: 12px; padding: 8px 12px;
  font-size: .86rem; background: var(--white); color: var(--ink); cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.nav-toggle { display: none; background: none; border: 0; font-size: 1.6rem; color: var(--green-deep); cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 30px; border-radius: 999px; font-weight: 700; font-size: .98rem;
  background: var(--amber); color: #3a2703; border: 0; cursor: pointer;
  box-shadow: 0 10px 24px rgba(242, 169, 59, .35);
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(242, 169, 59, .42); background: #ffb84e; }
.btn.secondary {
  background: rgba(255, 255, 255, .12); color: #fff; border: 1.5px solid rgba(255, 255, 255, .45);
  box-shadow: none;
}
.btn.secondary:hover { background: rgba(255, 255, 255, .2); }
.btn.ghost { background: var(--green-soft); color: var(--green-dark); box-shadow: none; }
.btn.ghost:hover { background: #d9efe3; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    linear-gradient(90deg, rgba(6, 36, 25, .86) 0%, rgba(8, 47, 34, .62) 34%, rgba(8, 47, 34, .32) 62%, rgba(8, 47, 34, .16) 100%),
    radial-gradient(900px 480px at 82% 12%, rgba(42, 163, 111, .30), transparent 62%),
    url("../images/hero-banner-fos-v2.jpg") center / cover no-repeat,
    linear-gradient(135deg, #082f22 0%, #0b3d2c 45%, #105a3e 100%);
  color: #fff; padding: 118px 0 170px;
}
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .22;
  background-image:
    linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(760px 460px at 22% 18%, #000 0%, transparent 74%);
}
.hero::after {
  content: ""; position: absolute; right: -140px; top: -140px; width: 520px; height: 520px;
  border: 2px solid rgba(255, 255, 255, .12); border-radius: 50%;
}
.hero .ring2 { position: absolute; right: -60px; top: -60px; width: 360px; height: 360px; border: 1.5px solid rgba(255,255,255,.10); border-radius: 50%; }
.hero .container { position: relative; z-index: 3; }
.hero .container { display: flex; align-items: center; gap: 48px; }
.hero .hero-copy { flex: 1 1 56%; }
.hero-art { flex: 0 1 44%; min-width: 0; }
.hero-art img {
  width: 100%; display: block; border-radius: 26px; background: transparent;
  object-fit: contain;
  box-shadow: 0 34px 70px rgba(0, 0, 0, .42);
}
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .28);
  padding: 8px 18px; border-radius: 999px; font-size: .84rem; letter-spacing: .12em;
  text-transform: uppercase; color: #d8f0e3;
}
.hero .eyebrow i { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); }
.hero h1 { font-size: clamp(2.5rem, 5.6vw, 4.1rem); line-height: 1.12; margin: 26px 0 20px; max-width: 860px; font-weight: 800; letter-spacing: -.01em; }
.hero .hero-copy h1 { max-width: 700px; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero .lead { font-size: 1.16rem; max-width: 660px; color: #cfe6d9; margin-bottom: 34px; }
.hero .btn-group { display: flex; gap: 16px; flex-wrap: wrap; }

/* floating trust bar */
.trust-bar {
  position: relative; z-index: 5; margin-top: -92px;
}
.trust-card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 34px 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.trust-card .stat { text-align: center; padding: 6px 8px; }
.trust-card .stat b { display: block; font-size: 2rem; font-weight: 800; color: var(--green-dark); line-height: 1.2; }
.trust-card .stat b small { font-size: 1rem; color: var(--amber-dark); }
.trust-card .stat span { font-size: .9rem; color: var(--muted); }
.trust-card .stat + .stat { border-left: 1px solid var(--line); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg); }
.section-head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.kicker {
  display: inline-block; font-size: .82rem; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--green-mid); margin-bottom: 12px;
}
.section-head h2, .block-title { font-size: clamp(1.8rem, 3.2vw, 2.5rem); color: var(--ink); line-height: 1.2; font-weight: 800; }
.section-head .lead { margin-top: 16px; font-size: 1.06rem; color: var(--muted); }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.card .icon-box {
  width: 58px; height: 58px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
  background: var(--green-soft); margin-bottom: 20px;
}
.card .icon-box svg { width: 28px; height: 28px; stroke: var(--green); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 1.12rem; color: var(--ink); margin-bottom: 10px; font-weight: 700; }
.card p { font-size: .96rem; color: var(--body); }
.card .tag {
  display: inline-block; margin-top: 14px; padding: 5px 14px; border-radius: 999px;
  background: var(--amber-soft); color: var(--amber-dark); font-size: .8rem; font-weight: 700;
}
.card-media {
  margin: -34px -30px 24px; border-radius: var(--radius) var(--radius) 0 0; overflow: hidden;
  background: var(--green-deep); line-height: 0; border-bottom: 1px solid var(--line);
}
.card-media img { width: 100%; height: 230px; object-fit: cover; }

/* product tiles (FOS powder / syrup) */
.prod-tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; margin: 30px 0 44px; }
.prod-tile {
  position: relative; overflow: hidden; border-radius: var(--radius); padding: 40px 36px;
  color: #fff; min-height: 250px; display: flex; flex-direction: column; justify-content: flex-end;
}
.prod-tile.powder { background: linear-gradient(135deg, #0b3d2c 0%, #177e52 100%); }
.prod-tile.syrup { background: linear-gradient(135deg, #6b3f08 0%, #d98c1d 100%); }
.prod-tile .tile-icon { position: absolute; right: 26px; top: 26px; opacity: .22; }
.prod-tile .tile-icon svg { width: 92px; height: 92px; stroke: #fff; fill: none; stroke-width: 1.2; }
.prod-tile .tile-art {
  position: absolute; right: 24px; bottom: 22px; width: 36%;
  border-radius: 18px; overflow: hidden; box-shadow: 0 16px 30px rgba(0, 0, 0, .28);
  line-height: 0; border: 4px solid #fff; background: #fff;
}
.prod-tile .tile-art img { width: 100%; height: 100%; object-fit: contain; }
.prod-tile h3 { font-size: 1.55rem; font-weight: 800; margin-bottom: 8px; }
.prod-tile .spec { font-size: .96rem; opacity: .92; max-width: 78%; }
.prod-tile .tag {
  align-self: flex-start; margin-top: 16px; padding: 6px 16px; border-radius: 999px;
  background: rgba(255, 255, 255, .18); border: 1px solid rgba(255, 255, 255, .35);
  font-size: .82rem; font-weight: 700;
}

/* ---------- Benefit items ---------- */
.benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.benefit {
  display: flex; gap: 16px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 22px 24px; box-shadow: var(--shadow-sm);
}
.benefit .dot { flex: 0 0 12px; width: 12px; height: 12px; border-radius: 50%; background: var(--amber); margin-top: 7px; }
.benefit b { display: block; color: var(--ink); font-size: 1.02rem; }
.benefit span { font-size: .9rem; color: var(--muted); }

/* ---------- App chips ---------- */
.app-chips { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; max-width: 900px; margin: 0 auto; }
.chip {
  display: inline-flex; align-items: center; gap: 10px; padding: 15px 26px;
  background: #fff; border: 1.5px solid var(--line); border-radius: 999px;
  font-weight: 700; color: var(--green-dark); font-size: .98rem; box-shadow: var(--shadow-sm);
  transition: transform .2s, border-color .2s, background .2s;
}
.chip:hover { transform: translateY(-3px); border-color: var(--green-mid); background: var(--green-soft); }
.chip svg { width: 20px; height: 20px; stroke: var(--green-mid); fill: none; stroke-width: 1.8; }

/* ---------- Why us ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.why-item { text-align: center; padding: 30px 22px; }
.why-item .num {
  width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--amber-soft); color: var(--amber-dark); font-weight: 800; font-size: 1.15rem;
}
.why-item b { display: block; color: var(--ink); font-size: 1.02rem; margin-bottom: 8px; }
.why-item span { font-size: .9rem; color: var(--muted); }

/* ---------- Visit / CTA bands ---------- */
.band {
  position: relative; overflow: hidden; color: #fff; padding: 90px 0;
  background:
    radial-gradient(800px 420px at 88% 10%, rgba(242, 169, 59, .22), transparent 60%),
    linear-gradient(135deg, #082f22 0%, #0b3d2c 55%, #105a3e 100%);
}
.band .container { position: relative; z-index: 2; }
.band h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin: 14px 0 16px; font-weight: 800; }
.band .lead { color: #cfe6d9; font-size: 1.08rem; max-width: 640px; }
.band .btn-group { margin-top: 30px; display: flex; gap: 16px; flex-wrap: wrap; }

.cta {
  background: var(--amber); color: #3a2703; text-align: center; padding: 74px 0;
}
.cta h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 12px; }
.cta p { max-width: 560px; margin: 0 auto 26px; color: #5c3e08; font-size: 1.05rem; }
.cta .btn { background: var(--green-deep); color: #fff; box-shadow: 0 10px 24px rgba(11, 61, 44, .35); }
.cta .btn:hover { background: #0d4b34; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th {
  text-align: left; padding: 16px 22px; background: var(--green-deep); color: #fff;
  font-weight: 700; font-size: .88rem; letter-spacing: .04em; white-space: nowrap;
}
td { padding: 15px 22px; border-top: 1px solid var(--line); color: var(--body); }
tbody tr:hover { background: var(--green-soft); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 30px; align-items: start; }
.info-block { display: grid; gap: 8px; }
.info-block h3 { color: var(--ink); font-size: 1.05rem; margin-top: 14px; }
.info-block p { color: var(--body); }
.info-block a { color: var(--green-dark); font-weight: 600; }
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px 34px; box-shadow: var(--shadow-md);
}
.form-card label { display: block; font-weight: 700; color: var(--ink); font-size: .9rem; margin: 16px 0 7px; }
.form-card input, .form-card textarea {
  width: 100%; padding: 13px 16px; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  font-size: .96rem; font-family: inherit; color: var(--ink); transition: border-color .2s, box-shadow .2s;
}
.form-card input:focus, .form-card textarea:focus { outline: none; border-color: var(--green-mid); box-shadow: 0 0 0 4px rgba(42, 163, 111, .12); }
.form-card textarea { min-height: 130px; resize: vertical; }
.form-note { margin-top: 14px; font-size: .84rem; color: var(--muted); }

/* ---------- Media rows ---------- */
.media-row { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.media-row img { border-radius: var(--radius); box-shadow: var(--shadow-md); width: 100%; object-fit: cover; }
.media-row .kicker { margin-bottom: 10px; }
.media-row h2 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); color: var(--ink); margin-bottom: 16px; font-weight: 800; }
.media-row p { color: var(--body); }

/* ---------- Brochure preview ---------- */
.brochure-card {
  display: grid; grid-template-columns: 340px 1fr; gap: 36px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-md);
}
.brochure-card .brochure-thumb {
  border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--line);
  box-shadow: var(--shadow-sm); line-height: 0; background: var(--bg);
}
.brochure-card .brochure-thumb img { width: 100%; height: auto; transition: transform .3s; }
.brochure-card:hover .brochure-thumb img { transform: scale(1.03); }

/* ---------- Clickable products ---------- */
[data-product] { cursor: pointer; transition: transform .2s, box-shadow .2s; }
.card[data-product]:hover, .prod-tile[data-product]:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.prod-tile[data-product]:hover { box-shadow: 0 22px 46px rgba(0, 0, 0, .35); }
.trow-name { color: var(--green-dark); font-weight: 700; }
tbody tr[data-product]:hover .trow-name { text-decoration: underline; }

/* ---------- Product modal ---------- */
.modal { position: fixed; inset: 0; z-index: 300; display: none; align-items: center; justify-content: center; padding: 24px; }
.modal.open { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(5, 28, 18, .66); backdrop-filter: blur(4px); }
.modal-panel {
  position: relative; width: min(780px, 100%); max-height: 88vh; overflow-y: auto;
  background: #fff; border-radius: 26px; padding: 42px 44px;
  box-shadow: 0 44px 100px rgba(0, 0, 0, .45);
}
.modal-close {
  position: absolute; top: 18px; right: 18px; width: 40px; height: 40px; border-radius: 50%;
  border: 0; background: var(--green-soft); color: var(--green-dark); font-size: 22px; line-height: 1;
  cursor: pointer; transition: background .2s;
}
.modal-close:hover { background: var(--amber-soft); }
.pm-name { font-size: 1.75rem; color: var(--ink); font-weight: 800; margin: 8px 0 10px; padding-right: 44px; }
.pm-tagline { color: var(--body); margin-bottom: 20px; font-size: 1.02rem; }
.pm-spec-box { background: var(--green-soft); border-radius: var(--radius-sm); padding: 15px 20px; font-weight: 700; color: var(--green-dark); margin-bottom: 24px; }
.pm-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 28px; margin-bottom: 8px; }
.pm-grid h4, .pm-apps-title { font-size: .84rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
#pm-points { list-style: none; }
#pm-points li { position: relative; padding-left: 22px; margin-bottom: 9px; color: var(--body); font-size: .95rem; }
#pm-points li::before { content: ""; position: absolute; left: 0; top: 9px; width: 9px; height: 9px; border-radius: 50%; background: var(--amber); }
.chip-sm { padding: 7px 15px; font-size: .84rem; margin: 0 8px 8px 0; }
.pm-foot {
  border-top: 1px solid var(--line); margin-top: 14px; padding-top: 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.pm-foot small { display: block; color: var(--muted); font-size: .84rem; margin-bottom: 5px; }
.pm-foot p { font-size: .94rem; color: var(--green-dark); font-weight: 700; }
@media (max-width: 760px) {
  .pm-grid { grid-template-columns: 1fr; }
  .modal-panel { padding: 30px 24px; }
}

/* ---------- Footer ---------- */
.site-footer { background: #082b1f; color: #b9d4c6; padding: 64px 0 36px; }
.site-footer .grid { grid-template-columns: 1.3fr 1fr 1fr; }
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 700; }
.site-footer p { font-size: .9rem; line-height: 1.8; }
.site-footer a { color: #d6ecdf; }
.site-footer a:hover { color: var(--amber); }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 44px; padding-top: 22px; font-size: .82rem; text-align: center; color: #7fa894; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .grid-3, .grid-4, .why-grid, .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-card { grid-template-columns: repeat(2, 1fr); }
  .trust-card .stat:nth-child(3) { border-left: 0; }
  .media-row { grid-template-columns: 1fr; gap: 26px; }
  .brochure-card { grid-template-columns: 1fr; }
  .hero .container { flex-direction: column; align-items: flex-start; }
  .hero-art { flex: 1 1 auto; max-width: 460px; margin-top: 8px; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff;
    flex-direction: column; align-items: flex-start; padding: 18px 6%; gap: 16px;
    box-shadow: var(--shadow-lg); border-top: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .hero { padding: 86px 0 150px; }
  .grid-2, .grid-3, .grid-4, .why-grid, .benefit-grid, .contact-grid { grid-template-columns: 1fr; }
  .prod-tiles { grid-template-columns: 1fr; }
  .trust-card { grid-template-columns: 1fr 1fr; padding: 24px; }
  .site-footer .grid { grid-template-columns: 1fr; }
}